[{"publication_status":"published","publication_identifier":{"issn":["2046-2069"]},"citation":{"ieee":"M. Wortmann <i>et al.</i>, “Hard carbon microspheres with bimodal size distribution and hierarchical porosity <i>via</i> hydrothermal carbonization of trehalose,” <i>RSC Advances</i>, vol. 13, no. 21, pp. 14181–14189, 2023, doi: <a href=\"https://doi.org/10.1039/d3ra01301d\">10.1039/d3ra01301d</a>.","chicago":"Wortmann, Martin, Waldemar Keil, Elise Diestelhorst, Michael Westphal, René Haverkamp, Bennet Brockhagen, Jan Biedinger, et al. “Hard Carbon Microspheres with Bimodal Size Distribution and Hierarchical Porosity <i>via</i> Hydrothermal Carbonization of Trehalose.” <i>RSC Advances</i> 13, no. 21 (2023): 14181–89. <a href=\"https://doi.org/10.1039/d3ra01301d\">https://doi.org/10.1039/d3ra01301d</a>.","ama":"Wortmann M, Keil W, Diestelhorst E, et al. Hard carbon microspheres with bimodal size distribution and hierarchical porosity <i>via</i> hydrothermal carbonization of trehalose. <i>RSC Advances</i>. 2023;13(21):14181-14189. doi:<a href=\"https://doi.org/10.1039/d3ra01301d\">10.1039/d3ra01301d</a>","short":"M. Wortmann, W. Keil, E. Diestelhorst, M. Westphal, R. Haverkamp, B. Brockhagen, J. Biedinger, L. Bondzio, C. Weinberger, D. Baier, M. Tiemann, A. Hütten, T. Hellweg, G. Reiss, C. Schmidt, K. Sattler, N. Frese, RSC Advances 13 (2023) 14181–14189.","mla":"Wortmann, Martin, et al. “Hard Carbon Microspheres with Bimodal Size Distribution and Hierarchical Porosity <i>via</i> Hydrothermal Carbonization of Trehalose.” <i>RSC Advances</i>, vol. 13, no. 21, Royal Society of Chemistry (RSC), 2023, pp. 14181–89, doi:<a href=\"https://doi.org/10.1039/d3ra01301d\">10.1039/d3ra01301d</a>.","bibtex":"@article{Wortmann_Keil_Diestelhorst_Westphal_Haverkamp_Brockhagen_Biedinger_Bondzio_Weinberger_Baier_et al._2023, title={Hard carbon microspheres with bimodal size distribution and hierarchical porosity <i>via</i> hydrothermal carbonization of trehalose}, volume={13}, DOI={<a href=\"https://doi.org/10.1039/d3ra01301d\">10.1039/d3ra01301d</a>}, number={21}, journal={RSC Advances}, publisher={Royal Society of Chemistry (RSC)}, author={Wortmann, Martin and Keil, Waldemar and Diestelhorst, Elise and Westphal, Michael and Haverkamp, René and Brockhagen, Bennet and Biedinger, Jan and Bondzio, Laila and Weinberger, Christian and Baier, Dominik and et al.}, year={2023}, pages={14181–14189} }","apa":"Wortmann, M., Keil, W., Diestelhorst, E., Westphal, M., Haverkamp, R., Brockhagen, B., Biedinger, J., Bondzio, L., Weinberger, C., Baier, D., Tiemann, M., Hütten, A., Hellweg, T., Reiss, G., Schmidt, C., Sattler, K., &#38; Frese, N. (2023). Hard carbon microspheres with bimodal size distribution and hierarchical porosity <i>via</i> hydrothermal carbonization of trehalose. <i>RSC Advances</i>, <i>13</i>(21), 14181–14189. <a href=\"https://doi.org/10.1039/d3ra01301d\">https://doi.org/10.1039/d3ra01301d</a>"},"page":"14181-14189","intvolume":"        13","author":[{"full_name":"Wortmann, Martin","last_name":"Wortmann","first_name":"Martin"},{"full_name":"Keil, Waldemar","last_name":"Keil","first_name":"Waldemar"},{"first_name":"Elise","full_name":"Diestelhorst, Elise","last_name":"Diestelhorst"},{"last_name":"Westphal","full_name":"Westphal, Michael","first_name":"Michael"},{"full_name":"Haverkamp, René","last_name":"Haverkamp","first_name":"René"},{"full_name":"Brockhagen, Bennet","last_name":"Brockhagen","first_name":"Bennet"},{"first_name":"Jan","last_name":"Biedinger","full_name":"Biedinger, Jan"},{"last_name":"Bondzio","full_name":"Bondzio, Laila","first_name":"Laila"},{"first_name":"Christian","last_name":"Weinberger","full_name":"Weinberger, Christian","id":"11848"},{"first_name":"Dominik","full_name":"Baier, Dominik","last_name":"Baier"},{"first_name":"Michael","orcid":"0000-0003-1711-2722","last_name":"Tiemann","id":"23547","full_name":"Tiemann, Michael"},{"last_name":"Hütten","full_name":"Hütten, Andreas","first_name":"Andreas"},{"first_name":"Thomas","full_name":"Hellweg, Thomas","last_name":"Hellweg"},{"first_name":"Günter","last_name":"Reiss","full_name":"Reiss, Günter"},{"last_name":"Schmidt","full_name":"Schmidt, Claudia","first_name":"Claudia"},{"last_name":"Sattler","full_name":"Sattler, Klaus","first_name":"Klaus"},{"first_name":"Natalie","last_name":"Frese","full_name":"Frese, Natalie"}],"volume":13,"date_updated":"2023-05-12T07:18:51Z","oa":"1","main_file_link":[{"open_access":"1"}],"doi":"10.1039/d3ra01301d","type":"journal_article","status":"public","user_id":"23547","department":[{"_id":"35"},{"_id":"2"},{"_id":"307"}],"_id":"44837","issue":"21","quality_controlled":"1","year":"2023","date_created":"2023-05-12T07:16:15Z","publisher":"Royal Society of Chemistry (RSC)","title":"Hard carbon microspheres with bimodal size distribution and hierarchical porosity <i>via</i> hydrothermal carbonization of trehalose","publication":"RSC Advances","abstract":[{"lang":"eng","text":"Hydrothermal carbonization (HTC) is an efficient thermochemical method for the conversion of organic feedstock to carbonaceous solids. HTC of different saccharides is known to produce microspheres (MS) with mostly Gaussian size distribution, which are utilized as functional materials in various applications, both as pristine MS and as a precursor for hard carbon MS. Although the average size of the MS can be influenced by adjusting the process parameters, there is no reliable mechanism to affect their size distribution. Our results demonstrate that HTC of trehalose, in contrast to other saccharides, results in a distinctly bimodal sphere diameter distribution consisting of small spheres with diameters of (2.1 ± 0.2) μm and of large spheres with diameters of (10.4 ± 2.6) μm. Remarkably, after pyrolytic post-carbonization at 1000 °C the MS develop a multimodal pore size distribution with abundant macropores > 100 nm, mesopores > 10 nm and micropores < 2 nm, which were examined by small-angle X-ray scattering and visualized by charge-compensated helium ion microscopy. The bimodal size distribution and hierarchical porosity provide an extraordinary set of properties and potential variables for the tailored synthesis of hierarchical porous carbons, making trehalose-derived hard carbon MS a highly promising material for applications in catalysis, filtration, and energy storage devices."}],"language":[{"iso":"eng"}],"keyword":["General Chemical Engineering","General Chemistry"]},{"oa":"1","date_updated":"2023-06-21T09:50:14Z","volume":62,"author":[{"last_name":"Wrogemann","full_name":"Wrogemann, Jens Matthies","first_name":"Jens Matthies"},{"first_name":"Marco Joes","last_name":"Lüther","full_name":"Lüther, Marco Joes"},{"full_name":"Bärmann, Peer","last_name":"Bärmann","first_name":"Peer"},{"first_name":"Mailis","last_name":"Lounasvuori","full_name":"Lounasvuori, Mailis"},{"first_name":"Ali","last_name":"Javed","full_name":"Javed, Ali"},{"full_name":"Tiemann, Michael","id":"23547","last_name":"Tiemann","orcid":"0000-0003-1711-2722","first_name":"Michael"},{"first_name":"Ronny","full_name":"Golnak, Ronny","last_name":"Golnak"},{"first_name":"Jie","last_name":"Xiao","full_name":"Xiao, Jie"},{"first_name":"Tristan","full_name":"Petit, Tristan","last_name":"Petit"},{"full_name":"Placke, Tobias","last_name":"Placke","first_name":"Tobias"},{"first_name":"Martin","full_name":"Winter, Martin","last_name":"Winter"}],"doi":"10.1002/anie.202303111","main_file_link":[{"open_access":"1"}],"publication_identifier":{"issn":["1433-7851","1521-3773"]},"publication_status":"published","page":"e202303111","intvolume":"        62","citation":{"apa":"Wrogemann, J. M., Lüther, M. J., Bärmann, P., Lounasvuori, M., Javed, A., Tiemann, M., Golnak, R., Xiao, J., Petit, T., Placke, T., &#38; Winter, M. (2023). Overcoming Diffusion Limitation of Faradaic Processes: Property‐Performance Relationships of 2D Conductive Metal‐Organic Framework Cu3(HHTP)2 for Reversible Lithium‐Ion Storage. <i>Angewandte Chemie International Edition</i>, <i>62</i>(26), e202303111. <a href=\"https://doi.org/10.1002/anie.202303111\">https://doi.org/10.1002/anie.202303111</a>","bibtex":"@article{Wrogemann_Lüther_Bärmann_Lounasvuori_Javed_Tiemann_Golnak_Xiao_Petit_Placke_et al._2023, title={Overcoming Diffusion Limitation of Faradaic Processes: Property‐Performance Relationships of 2D Conductive Metal‐Organic Framework Cu3(HHTP)2 for Reversible Lithium‐Ion Storage}, volume={62}, DOI={<a href=\"https://doi.org/10.1002/anie.202303111\">10.1002/anie.202303111</a>}, number={26}, journal={Angewandte Chemie International Edition}, publisher={Wiley}, author={Wrogemann, Jens Matthies and Lüther, Marco Joes and Bärmann, Peer and Lounasvuori, Mailis and Javed, Ali and Tiemann, Michael and Golnak, Ronny and Xiao, Jie and Petit, Tristan and Placke, Tobias and et al.}, year={2023}, pages={e202303111} }","short":"J.M. Wrogemann, M.J. Lüther, P. Bärmann, M. Lounasvuori, A. Javed, M. Tiemann, R. Golnak, J. Xiao, T. Petit, T. Placke, M. Winter, Angewandte Chemie International Edition 62 (2023) e202303111.","mla":"Wrogemann, Jens Matthies, et al. “Overcoming Diffusion Limitation of Faradaic Processes: Property‐Performance Relationships of 2D Conductive Metal‐Organic Framework Cu3(HHTP)2 for Reversible Lithium‐Ion Storage.” <i>Angewandte Chemie International Edition</i>, vol. 62, no. 26, Wiley, 2023, p. e202303111, doi:<a href=\"https://doi.org/10.1002/anie.202303111\">10.1002/anie.202303111</a>.","chicago":"Wrogemann, Jens Matthies, Marco Joes Lüther, Peer Bärmann, Mailis Lounasvuori, Ali Javed, Michael Tiemann, Ronny Golnak, et al. “Overcoming Diffusion Limitation of Faradaic Processes: Property‐Performance Relationships of 2D Conductive Metal‐Organic Framework Cu3(HHTP)2 for Reversible Lithium‐Ion Storage.” <i>Angewandte Chemie International Edition</i> 62, no. 26 (2023): e202303111. <a href=\"https://doi.org/10.1002/anie.202303111\">https://doi.org/10.1002/anie.202303111</a>.","ieee":"J. M. Wrogemann <i>et al.</i>, “Overcoming Diffusion Limitation of Faradaic Processes: Property‐Performance Relationships of 2D Conductive Metal‐Organic Framework Cu3(HHTP)2 for Reversible Lithium‐Ion Storage,” <i>Angewandte Chemie International Edition</i>, vol. 62, no. 26, p. e202303111, 2023, doi: <a href=\"https://doi.org/10.1002/anie.202303111\">10.1002/anie.202303111</a>.","ama":"Wrogemann JM, Lüther MJ, Bärmann P, et al. Overcoming Diffusion Limitation of Faradaic Processes: Property‐Performance Relationships of 2D Conductive Metal‐Organic Framework Cu3(HHTP)2 for Reversible Lithium‐Ion Storage. <i>Angewandte Chemie International Edition</i>. 2023;62(26):e202303111. doi:<a href=\"https://doi.org/10.1002/anie.202303111\">10.1002/anie.202303111</a>"},"_id":"44116","department":[{"_id":"35"},{"_id":"2"},{"_id":"307"}],"user_id":"23547","type":"journal_article","status":"public","publisher":"Wiley","date_created":"2023-04-22T06:17:33Z","title":"Overcoming Diffusion Limitation of Faradaic Processes: Property‐Performance Relationships of 2D Conductive Metal‐Organic Framework Cu3(HHTP)2 for Reversible Lithium‐Ion Storage","quality_controlled":"1","issue":"26","year":"2023","keyword":["General Chemistry","Catalysis"],"language":[{"iso":"eng"}],"publication":"Angewandte Chemie International Edition","abstract":[{"text":"Faradaic reactions including charge transfer are often accompanied with diffusion limitation inside the bulk. Conductive two-dimensional frameworks (2D MOFs) with a fast ion transport can combine both - charge transfer and fast diffusion inside their porous structure. To study remaining diffusion limitations caused by particle morphology, different synthesis routes of Cu-2,3,6,7,10,11-hexahydroxytriphenylene (Cu3(HHTP)2), a copper-based 2D MOF, are used to obtain flake- and rod-like MOF particles. Both morphologies are systematically characterized and evaluated for redox-active Li+ ion storage. The redox mechanism is investigated by means of X-ray absorption spectroscopy, FTIR spectroscopy and in situ XRD. Both types are compared regarding kinetic properties for Li+ ion storage via cyclic voltammetry and impedance spectroscopy. A significant influence of particle morphology for 2D MOFs on kinetic aspects of electrochemical Li+ ion storage can be observed. This study opens the path for optimization of redox active porous structures to overcome diffusion limitations of Faradaic processes.","lang":"eng"}]},{"intvolume":"        13","page":"437-443","citation":{"ama":"Javed A, Steinke F, Wöhlbrandt S, Bunzen H, Stock N, Tiemann M. The role of sulfonate groups and hydrogen bonding in the proton conductivity of two coordination networks. <i>Beilstein Journal of Nanotechnology</i>. 2022;13:437-443. doi:<a href=\"https://doi.org/10.3762/bjnano.13.36\">10.3762/bjnano.13.36</a>","ieee":"A. Javed, F. Steinke, S. Wöhlbrandt, H. Bunzen, N. Stock, and M. Tiemann, “The role of sulfonate groups and hydrogen bonding in the proton conductivity of two coordination networks,” <i>Beilstein Journal of Nanotechnology</i>, vol. 13, pp. 437–443, 2022, doi: <a href=\"https://doi.org/10.3762/bjnano.13.36\">10.3762/bjnano.13.36</a>.","chicago":"Javed, Ali, Felix Steinke, Stephan Wöhlbrandt, Hana Bunzen, Norbert Stock, and Michael Tiemann. “The Role of Sulfonate Groups and Hydrogen Bonding in the Proton Conductivity of Two Coordination Networks.” <i>Beilstein Journal of Nanotechnology</i> 13 (2022): 437–43. <a href=\"https://doi.org/10.3762/bjnano.13.36\">https://doi.org/10.3762/bjnano.13.36</a>.","bibtex":"@article{Javed_Steinke_Wöhlbrandt_Bunzen_Stock_Tiemann_2022, title={The role of sulfonate groups and hydrogen bonding in the proton conductivity of two coordination networks}, volume={13}, DOI={<a href=\"https://doi.org/10.3762/bjnano.13.36\">10.3762/bjnano.13.36</a>}, journal={Beilstein Journal of Nanotechnology}, publisher={Beilstein Institut}, author={Javed, Ali and Steinke, Felix and Wöhlbrandt, Stephan and Bunzen, Hana and Stock, Norbert and Tiemann, Michael}, year={2022}, pages={437–443} }","mla":"Javed, Ali, et al. “The Role of Sulfonate Groups and Hydrogen Bonding in the Proton Conductivity of Two Coordination Networks.” <i>Beilstein Journal of Nanotechnology</i>, vol. 13, Beilstein Institut, 2022, pp. 437–43, doi:<a href=\"https://doi.org/10.3762/bjnano.13.36\">10.3762/bjnano.13.36</a>.","short":"A. Javed, F. Steinke, S. Wöhlbrandt, H. Bunzen, N. Stock, M. Tiemann, Beilstein Journal of Nanotechnology 13 (2022) 437–443.","apa":"Javed, A., Steinke, F., Wöhlbrandt, S., Bunzen, H., Stock, N., &#38; Tiemann, M. (2022). The role of sulfonate groups and hydrogen bonding in the proton conductivity of two coordination networks. <i>Beilstein Journal of Nanotechnology</i>, <i>13</i>, 437–443. <a href=\"https://doi.org/10.3762/bjnano.13.36\">https://doi.org/10.3762/bjnano.13.36</a>"},"publication_identifier":{"issn":["2190-4286"]},"publication_status":"published","doi":"10.3762/bjnano.13.36","main_file_link":[{"open_access":"1","url":"https://www.beilstein-journals.org/bjnano/content/pdf/2190-4286-13-36.pdf"}],"volume":13,"author":[{"first_name":"Ali","full_name":"Javed, Ali","last_name":"Javed"},{"first_name":"Felix","last_name":"Steinke","full_name":"Steinke, Felix"},{"first_name":"Stephan","full_name":"Wöhlbrandt, Stephan","last_name":"Wöhlbrandt"},{"first_name":"Hana","last_name":"Bunzen","full_name":"Bunzen, Hana"},{"last_name":"Stock","full_name":"Stock, Norbert","first_name":"Norbert"},{"first_name":"Michael","last_name":"Tiemann","orcid":"0000-0003-1711-2722","id":"23547","full_name":"Tiemann, Michael"}],"oa":"1","date_updated":"2023-03-03T08:37:14Z","status":"public","type":"journal_article","article_type":"original","department":[{"_id":"35"},{"_id":"2"},{"_id":"307"}],"user_id":"23547","_id":"35707","year":"2022","quality_controlled":"1","title":"The role of sulfonate groups and hydrogen bonding in the proton conductivity of two coordination networks","date_created":"2023-01-10T09:12:54Z","publisher":"Beilstein Institut","abstract":[{"lang":"eng","text":"<jats:p>The proton conductivity of two coordination networks, [Mg(H<jats:sub>2</jats:sub>O)<jats:sub>2</jats:sub>(H<jats:sub>3</jats:sub>L)]·H<jats:sub>2</jats:sub>O and [Pb<jats:sub>2</jats:sub>(HL)]·H<jats:sub>2</jats:sub>O (H<jats:sub>5</jats:sub>L = (H<jats:sub>2</jats:sub>O<jats:sub>3</jats:sub>PCH<jats:sub>2</jats:sub>)<jats:sub>2</jats:sub>-NCH<jats:sub>2</jats:sub>-C<jats:sub>6</jats:sub>H<jats:sub>4</jats:sub>-SO<jats:sub>3</jats:sub>H), is investigated by AC impedance spectroscopy. Both materials contain the same phosphonato-sulfonate linker molecule, but have clearly different crystal structures, which has a strong effect on proton conductivity. In the Mg-based coordination network, dangling sulfonate groups are part of an extended hydrogen bonding network, facilitating a “proton hopping” with low activation energy; the material shows a moderate proton conductivity. In the Pb-based metal-organic framework, in contrast, no extended hydrogen bonding occurs, as the sulfonate groups coordinate to Pb<jats:sup>2+</jats:sup>, without forming hydrogen bonds; the proton conductivity is much lower in this material.</jats:p>"}],"publication":"Beilstein Journal of Nanotechnology","language":[{"iso":"eng"}],"keyword":["Electrical and Electronic Engineering","General Physics and Astronomy","General Materials Science"]},{"doi":"10.1016/j.apsusc.2022.154525","title":"Challenges in the interpretation of gas core levels for the determination of gas-solid interactions within dielectric porous films by ambient pressure XPS","volume":604,"author":[{"first_name":"Teresa","full_name":"de los Arcos, Teresa","last_name":"de los Arcos"},{"last_name":"Weinberger","id":"11848","full_name":"Weinberger, Christian","first_name":"Christian"},{"full_name":"Zysk, Frederik","id":"14757","last_name":"Zysk","first_name":"Frederik"},{"first_name":"Varun","last_name":"Raj Damerla","full_name":"Raj Damerla, Varun"},{"first_name":"Sabrina","full_name":"Kollmann, Sabrina","last_name":"Kollmann"},{"last_name":"Vieth","full_name":"Vieth, Pascal","first_name":"Pascal"},{"first_name":"Michael","orcid":"0000-0003-1711-2722","last_name":"Tiemann","full_name":"Tiemann, Michael","id":"23547"},{"first_name":"Thomas","last_name":"Kühne","full_name":"Kühne, Thomas","id":"49079"},{"first_name":"Guido","full_name":"Grundmeier, Guido","id":"194","last_name":"Grundmeier"}],"date_created":"2022-10-11T08:22:25Z","date_updated":"2023-03-03T11:32:04Z","publisher":"Elsevier BV","intvolume":"       604","citation":{"bibtex":"@article{de los Arcos_Weinberger_Zysk_Raj Damerla_Kollmann_Vieth_Tiemann_Kühne_Grundmeier_2022, title={Challenges in the interpretation of gas core levels for the determination of gas-solid interactions within dielectric porous films by ambient pressure XPS}, volume={604}, DOI={<a href=\"https://doi.org/10.1016/j.apsusc.2022.154525\">10.1016/j.apsusc.2022.154525</a>}, number={154525}, journal={Applied Surface Science}, publisher={Elsevier BV}, author={de los Arcos, Teresa and Weinberger, Christian and Zysk, Frederik and Raj Damerla, Varun and Kollmann, Sabrina and Vieth, Pascal and Tiemann, Michael and Kühne, Thomas and Grundmeier, Guido}, year={2022} }","short":"T. de los Arcos, C. Weinberger, F. Zysk, V. Raj Damerla, S. Kollmann, P. Vieth, M. Tiemann, T. Kühne, G. Grundmeier, Applied Surface Science 604 (2022).","mla":"de los Arcos, Teresa, et al. “Challenges in the Interpretation of Gas Core Levels for the Determination of Gas-Solid Interactions within Dielectric Porous Films by Ambient Pressure XPS.” <i>Applied Surface Science</i>, vol. 604, 154525, Elsevier BV, 2022, doi:<a href=\"https://doi.org/10.1016/j.apsusc.2022.154525\">10.1016/j.apsusc.2022.154525</a>.","apa":"de los Arcos, T., Weinberger, C., Zysk, F., Raj Damerla, V., Kollmann, S., Vieth, P., Tiemann, M., Kühne, T., &#38; Grundmeier, G. (2022). Challenges in the interpretation of gas core levels for the determination of gas-solid interactions within dielectric porous films by ambient pressure XPS. <i>Applied Surface Science</i>, <i>604</i>, Article 154525. <a href=\"https://doi.org/10.1016/j.apsusc.2022.154525\">https://doi.org/10.1016/j.apsusc.2022.154525</a>","ama":"de los Arcos T, Weinberger C, Zysk F, et al. Challenges in the interpretation of gas core levels for the determination of gas-solid interactions within dielectric porous films by ambient pressure XPS. <i>Applied Surface Science</i>. 2022;604. doi:<a href=\"https://doi.org/10.1016/j.apsusc.2022.154525\">10.1016/j.apsusc.2022.154525</a>","chicago":"Arcos, Teresa de los, Christian Weinberger, Frederik Zysk, Varun Raj Damerla, Sabrina Kollmann, Pascal Vieth, Michael Tiemann, Thomas Kühne, and Guido Grundmeier. “Challenges in the Interpretation of Gas Core Levels for the Determination of Gas-Solid Interactions within Dielectric Porous Films by Ambient Pressure XPS.” <i>Applied Surface Science</i> 604 (2022). <a href=\"https://doi.org/10.1016/j.apsusc.2022.154525\">https://doi.org/10.1016/j.apsusc.2022.154525</a>.","ieee":"T. de los Arcos <i>et al.</i>, “Challenges in the interpretation of gas core levels for the determination of gas-solid interactions within dielectric porous films by ambient pressure XPS,” <i>Applied Surface Science</i>, vol. 604, Art. no. 154525, 2022, doi: <a href=\"https://doi.org/10.1016/j.apsusc.2022.154525\">10.1016/j.apsusc.2022.154525</a>."},"year":"2022","quality_controlled":"1","publication_identifier":{"issn":["0169-4332"]},"publication_status":"published","language":[{"iso":"eng"}],"keyword":["Surfaces","Coatings and Films","Condensed Matter Physics","Surfaces and Interfaces","General Physics and Astronomy","General Chemistry"],"article_type":"original","article_number":"154525","department":[{"_id":"613"},{"_id":"35"},{"_id":"2"},{"_id":"307"},{"_id":"302"},{"_id":"304"}],"user_id":"23547","_id":"33691","status":"public","abstract":[{"lang":"eng","text":"Near ambient pressure XPS in nitrogen atmosphere was utilized to investigate gas-solid interactions within porous SiO2 films ranging from 30 to 75 nm thickness. The films were differentiated in terms of porosity and roughness. The XPS N1s core levels of the N2 gas in presence of the SiO2 samples showed variations in width, binding energy and line shape. The width correlated with the surface charge induced in the dielectric films upon X-ray irradiation. The observed different binding energies observed for the N1s peak can only partly be associated with intrinsic work function differences between the samples, opening the possibility that the effect of physisorption at room temperature could be detected by a shift in the measured binding energy. However, the signals also show an increasing asymmetry with rising surface charge. This might be associated with the formation of vertical electrical gradients within the dielectric porous thin films, which complicates the assignment of binding energy positions to specific surface-related effects. With the support of Monte Carlo and first principles density functional theory calculations, the observed shifts were discussed in terms of the possible formation of transitory dipoles upon N2 physisorption within the porous SiO2 films."}],"publication":"Applied Surface Science","type":"journal_article"},{"citation":{"ama":"Weinberger C, Zysk F, Hartmann M, et al. The Structure of Water in Silica Mesopores – Influence of the Pore Wall Polarity. <i>Advanced Materials Interfaces</i>. 2022;9(20). doi:<a href=\"https://doi.org/10.1002/admi.202200245\">10.1002/admi.202200245</a>","ieee":"C. Weinberger <i>et al.</i>, “The Structure of Water in Silica Mesopores – Influence of the Pore Wall Polarity,” <i>Advanced Materials Interfaces</i>, vol. 9, no. 20, Art. no. 2200245, 2022, doi: <a href=\"https://doi.org/10.1002/admi.202200245\">10.1002/admi.202200245</a>.","chicago":"Weinberger, Christian, Frederik Zysk, Marc Hartmann, Naveen Kaliannan, Waldemar Keil, Thomas Kühne, and Michael Tiemann. “The Structure of Water in Silica Mesopores – Influence of the Pore Wall Polarity.” <i>Advanced Materials Interfaces</i> 9, no. 20 (2022). <a href=\"https://doi.org/10.1002/admi.202200245\">https://doi.org/10.1002/admi.202200245</a>.","short":"C. Weinberger, F. Zysk, M. Hartmann, N. Kaliannan, W. Keil, T. Kühne, M. Tiemann, Advanced Materials Interfaces 9 (2022).","bibtex":"@article{Weinberger_Zysk_Hartmann_Kaliannan_Keil_Kühne_Tiemann_2022, title={The Structure of Water in Silica Mesopores – Influence of the Pore Wall Polarity}, volume={9}, DOI={<a href=\"https://doi.org/10.1002/admi.202200245\">10.1002/admi.202200245</a>}, number={202200245}, journal={Advanced Materials Interfaces}, publisher={Wiley}, author={Weinberger, Christian and Zysk, Frederik and Hartmann, Marc and Kaliannan, Naveen and Keil, Waldemar and Kühne, Thomas and Tiemann, Michael}, year={2022} }","mla":"Weinberger, Christian, et al. “The Structure of Water in Silica Mesopores – Influence of the Pore Wall Polarity.” <i>Advanced Materials Interfaces</i>, vol. 9, no. 20, 2200245, Wiley, 2022, doi:<a href=\"https://doi.org/10.1002/admi.202200245\">10.1002/admi.202200245</a>.","apa":"Weinberger, C., Zysk, F., Hartmann, M., Kaliannan, N., Keil, W., Kühne, T., &#38; Tiemann, M. (2022). The Structure of Water in Silica Mesopores – Influence of the Pore Wall Polarity. <i>Advanced Materials Interfaces</i>, <i>9</i>(20), Article 2200245. <a href=\"https://doi.org/10.1002/admi.202200245\">https://doi.org/10.1002/admi.202200245</a>"},"intvolume":"         9","publication_status":"published","publication_identifier":{"issn":["2196-7350","2196-7350"]},"main_file_link":[{"url":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/admi.202200245","open_access":"1"}],"doi":"10.1002/admi.202200245","author":[{"first_name":"Christian","last_name":"Weinberger","full_name":"Weinberger, Christian","id":"11848"},{"full_name":"Zysk, Frederik","id":"14757","last_name":"Zysk","first_name":"Frederik"},{"first_name":"Marc","last_name":"Hartmann","full_name":"Hartmann, Marc"},{"first_name":"Naveen","last_name":"Kaliannan","full_name":"Kaliannan, Naveen"},{"full_name":"Keil, Waldemar","last_name":"Keil","first_name":"Waldemar"},{"last_name":"Kühne","full_name":"Kühne, Thomas","id":"49079","first_name":"Thomas"},{"full_name":"Tiemann, Michael","id":"23547","orcid":"0000-0003-1711-2722","last_name":"Tiemann","first_name":"Michael"}],"volume":9,"date_updated":"2023-03-03T11:33:24Z","oa":"1","status":"public","type":"journal_article","article_number":"2200245","article_type":"original","user_id":"23547","department":[{"_id":"613"},{"_id":"35"},{"_id":"2"},{"_id":"307"},{"_id":"304"}],"_id":"33685","year":"2022","issue":"20","quality_controlled":"1","title":"The Structure of Water in Silica Mesopores – Influence of the Pore Wall Polarity","date_created":"2022-10-11T08:17:57Z","publisher":"Wiley","abstract":[{"lang":"eng","text":"In the spatial confinement of cylindrical mesopores with diameters of a few nanometers, water molecules experience restrictions in hydrogen bonding. This leads to a different behavior regarding the molecular orientational freedom (‘structure of water') compared to the bulk liquid state. In addition to the pore size, the behavior is also strongly affected by the strength of the pore wall-to-water interactions, that is, the pore wall polarity. In this work, this is studied both experimentally and theoretically. The surface polarity of mesoporous silica (SiO2) is modified by functionalization with trimethylsilyl moieties, resulting in a change from a hydrophilic (pristine) to a hydrophobic pore wall. The mesopore surface is characterized by N2 and H2O sorption experiments. Those results are combined with IR spectroscopy to investigate pore wall-to-water interactions leading to different structures of water in the mesopore. Furthermore, the water's structure is studied theoretically to gain deeper insight into the interfacial interactions. For this purpose, the structure of water is analyzed by pairing densities, coordination, and angular distributions with a novel adaptation of surface-specific sum-frequency generation calculation for pore environments."}],"publication":"Advanced Materials Interfaces","language":[{"iso":"eng"}],"keyword":["Mechanical Engineering","Mechanics of Materials"]},{"intvolume":"       161","citation":{"mla":"Wortmann, Martin, et al. “Pyrolysis of Sucrose-Derived Hydrochar.” <i>Journal of Analytical and Applied Pyrolysis</i>, vol. 161, 105404, Elsevier BV, 2022, doi:<a href=\"https://doi.org/10.1016/j.jaap.2021.105404\">10.1016/j.jaap.2021.105404</a>.","short":"M. Wortmann, W. Keil, B. Brockhagen, J. Biedinger, M. Westphal, C. Weinberger, E. Diestelhorst, W. Hachmann, Y. Zhao, M. Tiemann, G. Reiss, B. Hüsgen, C. Schmidt, K. Sattler, N. Frese, Journal of Analytical and Applied Pyrolysis 161 (2022).","bibtex":"@article{Wortmann_Keil_Brockhagen_Biedinger_Westphal_Weinberger_Diestelhorst_Hachmann_Zhao_Tiemann_et al._2022, title={Pyrolysis of sucrose-derived hydrochar}, volume={161}, DOI={<a href=\"https://doi.org/10.1016/j.jaap.2021.105404\">10.1016/j.jaap.2021.105404</a>}, number={105404}, journal={Journal of Analytical and Applied Pyrolysis}, publisher={Elsevier BV}, author={Wortmann, Martin and Keil, Waldemar and Brockhagen, Bennet and Biedinger, Jan and Westphal, Michael and Weinberger, Christian and Diestelhorst, Elise and Hachmann, Wiebke and Zhao, Yanjing and Tiemann, Michael and et al.}, year={2022} }","apa":"Wortmann, M., Keil, W., Brockhagen, B., Biedinger, J., Westphal, M., Weinberger, C., Diestelhorst, E., Hachmann, W., Zhao, Y., Tiemann, M., Reiss, G., Hüsgen, B., Schmidt, C., Sattler, K., &#38; Frese, N. (2022). Pyrolysis of sucrose-derived hydrochar. <i>Journal of Analytical and Applied Pyrolysis</i>, <i>161</i>, Article 105404. <a href=\"https://doi.org/10.1016/j.jaap.2021.105404\">https://doi.org/10.1016/j.jaap.2021.105404</a>","ieee":"M. Wortmann <i>et al.</i>, “Pyrolysis of sucrose-derived hydrochar,” <i>Journal of Analytical and Applied Pyrolysis</i>, vol. 161, Art. no. 105404, 2022, doi: <a href=\"https://doi.org/10.1016/j.jaap.2021.105404\">10.1016/j.jaap.2021.105404</a>.","chicago":"Wortmann, Martin, Waldemar Keil, Bennet Brockhagen, Jan Biedinger, Michael Westphal, Christian Weinberger, Elise Diestelhorst, et al. “Pyrolysis of Sucrose-Derived Hydrochar.” <i>Journal of Analytical and Applied Pyrolysis</i> 161 (2022). <a href=\"https://doi.org/10.1016/j.jaap.2021.105404\">https://doi.org/10.1016/j.jaap.2021.105404</a>.","ama":"Wortmann M, Keil W, Brockhagen B, et al. Pyrolysis of sucrose-derived hydrochar. <i>Journal of Analytical and Applied Pyrolysis</i>. 2022;161. doi:<a href=\"https://doi.org/10.1016/j.jaap.2021.105404\">10.1016/j.jaap.2021.105404</a>"},"publication_identifier":{"issn":["0165-2370"]},"publication_status":"published","doi":"10.1016/j.jaap.2021.105404","volume":161,"author":[{"full_name":"Wortmann, Martin","last_name":"Wortmann","first_name":"Martin"},{"first_name":"Waldemar","last_name":"Keil","full_name":"Keil, Waldemar"},{"last_name":"Brockhagen","full_name":"Brockhagen, Bennet","first_name":"Bennet"},{"first_name":"Jan","last_name":"Biedinger","full_name":"Biedinger, Jan"},{"full_name":"Westphal, Michael","last_name":"Westphal","first_name":"Michael"},{"id":"11848","full_name":"Weinberger, Christian","last_name":"Weinberger","first_name":"Christian"},{"full_name":"Diestelhorst, Elise","last_name":"Diestelhorst","first_name":"Elise"},{"full_name":"Hachmann, Wiebke","last_name":"Hachmann","first_name":"Wiebke"},{"first_name":"Yanjing","last_name":"Zhao","full_name":"Zhao, Yanjing"},{"last_name":"Tiemann","orcid":"0000-0003-1711-2722","full_name":"Tiemann, Michael","id":"23547","first_name":"Michael"},{"full_name":"Reiss, Günter","last_name":"Reiss","first_name":"Günter"},{"full_name":"Hüsgen, Bruno","last_name":"Hüsgen","first_name":"Bruno"},{"full_name":"Schmidt, Claudia","id":"466","last_name":"Schmidt","orcid":"0000-0003-3179-9997","first_name":"Claudia"},{"last_name":"Sattler","full_name":"Sattler, Klaus","first_name":"Klaus"},{"last_name":"Frese","full_name":"Frese, Natalie","first_name":"Natalie"}],"date_updated":"2023-03-08T08:15:24Z","status":"public","type":"journal_article","article_number":"105404","article_type":"original","department":[{"_id":"35"},{"_id":"2"},{"_id":"307"},{"_id":"315"}],"user_id":"23547","_id":"29376","year":"2022","quality_controlled":"1","title":"Pyrolysis of sucrose-derived hydrochar","date_created":"2022-01-18T06:25:06Z","publisher":"Elsevier BV","abstract":[{"text":"The electrochemical properties of carbonaceous materials produced by hydrothermal carbonization, referred to as hydrochar, can be substantially improved by post-carbonization via pyrolysis. Although these materials have been widely studied for a variety of applications, the mechanisms underlying the pyrolysis are yet poorly understood. This study provides a comprehensive temperature-resolved characterization of the chemical composition, morphology and crystallinity of sucrose-derived hydrochar during pyrolysis. Thermogravimetric analysis, differential scanning calorimetry, and elemental analysis have shown that the dry hydrochar loses about 41% of its dry mass due to the exothermic disintegration of oxygen-containing groups until the carbonization is completed at about 850 °C with a total carbon yield of 93%. The carbonization and aromatization of the initially furanic and keto-aliphatic structure were analyzed by 13C solid-state nuclear magnetic resonance spectroscopy, X-ray photoelectron spectroscopy, and Fourier transform infrared spectroscopy. The transition from an amorphous to a nanocrystalline graphitic structure was analyzed using X-ray diffraction and Raman spectroscopy. The pore formation mechanism was examined by helium ion microscopy, transmission electron microscopy, and nitrogen adsorption measurements. The results indicate the formation of oxygen-rich nanoclusters up to 700 °C, which decompose up to 750 °C leaving behind equally sized pores, resulting in a surface area of up to 480 m2/g.","lang":"eng"}],"publication":"Journal of Analytical and Applied Pyrolysis","language":[{"iso":"eng"}],"keyword":["Analytical Chemistry","Fuel Technology"]},{"publication":"Optical Materials Express","abstract":[{"lang":"eng","text":"With the rapid advances of functional dielectric metasurfaces and their integration on on-chip nanophotonic devices, the necessity of metasurfaces working in different environments, especially in biological applications, arose. However, the metasurfaces’ performance is tied to the unit cell’s efficiency and ultimately the surrounding environment it was designed for, thus reducing its applicability if exposed to altering refractive index media. Here, we report a method to increase a metasurface’s versatility by covering the high-index metasurface with a low index porous SiO2 film, protecting the metasurface from environmental changes while keeping the working efficiency unchanged. We show, that a covered metasurface retains its functionality even when exposed to fluidic environments."}],"language":[{"iso":"eng"}],"issue":"1","quality_controlled":"1","year":"2022","date_created":"2021-12-02T18:47:42Z","publisher":"Optica","title":"Porous SiO2 coated dielectric metasurface with consistent performance independent of environmental conditions","type":"journal_article","status":"public","department":[{"_id":"15"},{"_id":"230"},{"_id":"289"},{"_id":"623"},{"_id":"2"},{"_id":"35"},{"_id":"307"}],"user_id":"23547","_id":"28254","article_type":"original","publication_identifier":{"issn":["2159-3930"]},"publication_status":"published","page":"13-21","intvolume":"        12","citation":{"mla":"Geromel, René, et al. “Porous SiO2 Coated Dielectric Metasurface with Consistent Performance Independent of Environmental Conditions.” <i>Optical Materials Express</i>, vol. 12, no. 1, Optica, 2022, pp. 13–21, doi:<a href=\"https://doi.org/10.1364/ome.444264\">10.1364/ome.444264</a>.","bibtex":"@article{Geromel_Weinberger_Brormann_Tiemann_Zentgraf_2022, title={Porous SiO2 coated dielectric metasurface with consistent performance independent of environmental conditions}, volume={12}, DOI={<a href=\"https://doi.org/10.1364/ome.444264\">10.1364/ome.444264</a>}, number={1}, journal={Optical Materials Express}, publisher={Optica}, author={Geromel, René and Weinberger, Christian and Brormann, Katja and Tiemann, Michael and Zentgraf, Thomas}, year={2022}, pages={13–21} }","short":"R. Geromel, C. Weinberger, K. Brormann, M. Tiemann, T. Zentgraf, Optical Materials Express 12 (2022) 13–21.","apa":"Geromel, R., Weinberger, C., Brormann, K., Tiemann, M., &#38; Zentgraf, T. (2022). Porous SiO2 coated dielectric metasurface with consistent performance independent of environmental conditions. <i>Optical Materials Express</i>, <i>12</i>(1), 13–21. <a href=\"https://doi.org/10.1364/ome.444264\">https://doi.org/10.1364/ome.444264</a>","chicago":"Geromel, René, Christian Weinberger, Katja Brormann, Michael Tiemann, and Thomas Zentgraf. “Porous SiO2 Coated Dielectric Metasurface with Consistent Performance Independent of Environmental Conditions.” <i>Optical Materials Express</i> 12, no. 1 (2022): 13–21. <a href=\"https://doi.org/10.1364/ome.444264\">https://doi.org/10.1364/ome.444264</a>.","ieee":"R. Geromel, C. Weinberger, K. Brormann, M. Tiemann, and T. Zentgraf, “Porous SiO2 coated dielectric metasurface with consistent performance independent of environmental conditions,” <i>Optical Materials Express</i>, vol. 12, no. 1, pp. 13–21, 2022, doi: <a href=\"https://doi.org/10.1364/ome.444264\">10.1364/ome.444264</a>.","ama":"Geromel R, Weinberger C, Brormann K, Tiemann M, Zentgraf T. Porous SiO2 coated dielectric metasurface with consistent performance independent of environmental conditions. <i>Optical Materials Express</i>. 2022;12(1):13-21. doi:<a href=\"https://doi.org/10.1364/ome.444264\">10.1364/ome.444264</a>"},"volume":12,"author":[{"full_name":"Geromel, René","last_name":"Geromel","first_name":"René"},{"first_name":"Christian","full_name":"Weinberger, Christian","id":"11848","last_name":"Weinberger"},{"first_name":"Katja","last_name":"Brormann","full_name":"Brormann, Katja"},{"first_name":"Michael","orcid":"0000-0003-1711-2722","last_name":"Tiemann","id":"23547","full_name":"Tiemann, Michael"},{"first_name":"Thomas","id":"30525","full_name":"Zentgraf, Thomas","orcid":"0000-0002-8662-1101","last_name":"Zentgraf"}],"oa":"1","date_updated":"2023-03-08T08:13:58Z","doi":"10.1364/ome.444264","main_file_link":[{"url":"https://www.osapublishing.org/ome/fulltext.cfm?uri=ome-12-1-13&id=465602","open_access":"1"}]},{"title":"Stimulation and Enhancement of Near‐Band‐Edge Emission in Zinc Oxide by Distributed Bragg Reflectors","publisher":"Wiley","date_created":"2022-02-08T15:24:58Z","year":"2022","quality_controlled":"1","keyword":["Mechanical Engineering","Mechanics of Materials"],"language":[{"iso":"eng"}],"abstract":[{"text":"The free exciton transition (near-band-edge emission, NBE) of ZnO at ≈388 nm can be strongly enhanced and even stimulated by an underlying photonic structure. 1D Photonic crystals, so-called distributed Bragg reflectors, are utilized to suppress the deep-level emission of ZnO (DLE, ≈500–530 nm). The reflector stacks are fabricated in a layer-by-layer procedure by wet-chemical synthesis. They consist of low-ε porous SiO2 layers and high-ε TiO2 layers. Varying the thickness of the SiO2 layers allows tuning the optical bandgap in a wide range between ≈420 and 800 nm. A ZnO layer is deposited on top of the reflector stacks by sol–gel synthesis. The spontaneous photoluminescence (PL) emission of the ZnO film is modulated by the photonic structure. When the optical bandgap of the reflector is in resonance with the deep-level emission of ZnO (DLE, ≈500–530 nm), then this defect-related emission mode is suppressed. Strong NBE emission is observed even when the ZnO layer does not show any NBE emission (due to low crystallinity) in the absence of the photonic structure. With this cost-efficient synthesis method, emitters for, e.g., luminescent gas sensors can be fabricated.","lang":"eng"}],"publication":"Advanced Materials Interfaces","main_file_link":[{"open_access":"1","url":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/admi.202102357"}],"doi":"10.1002/admi.202102357","date_updated":"2025-05-27T07:42:58Z","oa":"1","author":[{"full_name":"Kothe, Linda","last_name":"Kothe","first_name":"Linda"},{"first_name":"Maximilian","full_name":"Albert, Maximilian","last_name":"Albert"},{"first_name":"Cedrik","full_name":"Meier, Cedrik","id":"20798","last_name":"Meier","orcid":"https://orcid.org/0000-0002-3787-3572"},{"full_name":"Wagner, Thorsten","last_name":"Wagner","first_name":"Thorsten"},{"first_name":"Michael","orcid":"0000-0003-1711-2722","last_name":"Tiemann","full_name":"Tiemann, Michael","id":"23547"}],"volume":9,"citation":{"short":"L. Kothe, M. Albert, C. Meier, T. Wagner, M. Tiemann, Advanced Materials Interfaces 9 (2022).","mla":"Kothe, Linda, et al. “Stimulation and Enhancement of Near‐Band‐Edge Emission in Zinc Oxide by Distributed Bragg Reflectors.” <i>Advanced Materials Interfaces</i>, vol. 9, 2102357, Wiley, 2022, doi:<a href=\"https://doi.org/10.1002/admi.202102357\">10.1002/admi.202102357</a>.","bibtex":"@article{Kothe_Albert_Meier_Wagner_Tiemann_2022, title={Stimulation and Enhancement of Near‐Band‐Edge Emission in Zinc Oxide by Distributed Bragg Reflectors}, volume={9}, DOI={<a href=\"https://doi.org/10.1002/admi.202102357\">10.1002/admi.202102357</a>}, number={2102357}, journal={Advanced Materials Interfaces}, publisher={Wiley}, author={Kothe, Linda and Albert, Maximilian and Meier, Cedrik and Wagner, Thorsten and Tiemann, Michael}, year={2022} }","apa":"Kothe, L., Albert, M., Meier, C., Wagner, T., &#38; Tiemann, M. (2022). Stimulation and Enhancement of Near‐Band‐Edge Emission in Zinc Oxide by Distributed Bragg Reflectors. <i>Advanced Materials Interfaces</i>, <i>9</i>, Article 2102357. <a href=\"https://doi.org/10.1002/admi.202102357\">https://doi.org/10.1002/admi.202102357</a>","ama":"Kothe L, Albert M, Meier C, Wagner T, Tiemann M. Stimulation and Enhancement of Near‐Band‐Edge Emission in Zinc Oxide by Distributed Bragg Reflectors. <i>Advanced Materials Interfaces</i>. 2022;9. doi:<a href=\"https://doi.org/10.1002/admi.202102357\">10.1002/admi.202102357</a>","chicago":"Kothe, Linda, Maximilian Albert, Cedrik Meier, Thorsten Wagner, and Michael Tiemann. “Stimulation and Enhancement of Near‐Band‐Edge Emission in Zinc Oxide by Distributed Bragg Reflectors.” <i>Advanced Materials Interfaces</i> 9 (2022). <a href=\"https://doi.org/10.1002/admi.202102357\">https://doi.org/10.1002/admi.202102357</a>.","ieee":"L. Kothe, M. Albert, C. Meier, T. Wagner, and M. Tiemann, “Stimulation and Enhancement of Near‐Band‐Edge Emission in Zinc Oxide by Distributed Bragg Reflectors,” <i>Advanced Materials Interfaces</i>, vol. 9, Art. no. 2102357, 2022, doi: <a href=\"https://doi.org/10.1002/admi.202102357\">10.1002/admi.202102357</a>."},"intvolume":"         9","publication_status":"published","publication_identifier":{"issn":["2196-7350","2196-7350"]},"article_type":"original","article_number":"2102357","_id":"29790","user_id":"23547","department":[{"_id":"15"},{"_id":"35"},{"_id":"2"},{"_id":"307"},{"_id":"230"}],"status":"public","type":"journal_article"},{"author":[{"first_name":"Bertram","full_name":"Schwind, Bertram","last_name":"Schwind"},{"first_name":"Jan-Henrik","full_name":"Smått, Jan-Henrik","last_name":"Smått"},{"full_name":"Tiemann, Michael","id":"23547","last_name":"Tiemann","orcid":"0000-0003-1711-2722","first_name":"Michael"},{"last_name":"Weinberger","full_name":"Weinberger, Christian","id":"11848","first_name":"Christian"}],"date_created":"2021-10-08T10:02:31Z","date_updated":"2023-03-07T10:44:44Z","doi":"10.1016/j.micromeso.2020.110330","title":"Modeling of gyroidal mesoporous CMK-8 and CMK-9 carbon nanostructures and their X-Ray diffraction patterns","publication_status":"published","publication_identifier":{"issn":["1387-1811"]},"quality_controlled":"1","citation":{"ama":"Schwind B, Smått J-H, Tiemann M, Weinberger C. Modeling of gyroidal mesoporous CMK-8 and CMK-9 carbon nanostructures and their X-Ray diffraction patterns. <i>Microporous and Mesoporous Materials</i>. Published online 2021. doi:<a href=\"https://doi.org/10.1016/j.micromeso.2020.110330\">10.1016/j.micromeso.2020.110330</a>","ieee":"B. Schwind, J.-H. Smått, M. Tiemann, and C. Weinberger, “Modeling of gyroidal mesoporous CMK-8 and CMK-9 carbon nanostructures and their X-Ray diffraction patterns,” <i>Microporous and Mesoporous Materials</i>, Art. no. 110330, 2021, doi: <a href=\"https://doi.org/10.1016/j.micromeso.2020.110330\">10.1016/j.micromeso.2020.110330</a>.","chicago":"Schwind, Bertram, Jan-Henrik Smått, Michael Tiemann, and Christian Weinberger. “Modeling of Gyroidal Mesoporous CMK-8 and CMK-9 Carbon Nanostructures and Their X-Ray Diffraction Patterns.” <i>Microporous and Mesoporous Materials</i>, 2021. <a href=\"https://doi.org/10.1016/j.micromeso.2020.110330\">https://doi.org/10.1016/j.micromeso.2020.110330</a>.","mla":"Schwind, Bertram, et al. “Modeling of Gyroidal Mesoporous CMK-8 and CMK-9 Carbon Nanostructures and Their X-Ray Diffraction Patterns.” <i>Microporous and Mesoporous Materials</i>, 110330, 2021, doi:<a href=\"https://doi.org/10.1016/j.micromeso.2020.110330\">10.1016/j.micromeso.2020.110330</a>.","short":"B. Schwind, J.-H. Smått, M. Tiemann, C. Weinberger, Microporous and Mesoporous Materials (2021).","bibtex":"@article{Schwind_Smått_Tiemann_Weinberger_2021, title={Modeling of gyroidal mesoporous CMK-8 and CMK-9 carbon nanostructures and their X-Ray diffraction patterns}, DOI={<a href=\"https://doi.org/10.1016/j.micromeso.2020.110330\">10.1016/j.micromeso.2020.110330</a>}, number={110330}, journal={Microporous and Mesoporous Materials}, author={Schwind, Bertram and Smått, Jan-Henrik and Tiemann, Michael and Weinberger, Christian}, year={2021} }","apa":"Schwind, B., Smått, J.-H., Tiemann, M., &#38; Weinberger, C. (2021). Modeling of gyroidal mesoporous CMK-8 and CMK-9 carbon nanostructures and their X-Ray diffraction patterns. <i>Microporous and Mesoporous Materials</i>, Article 110330. <a href=\"https://doi.org/10.1016/j.micromeso.2020.110330\">https://doi.org/10.1016/j.micromeso.2020.110330</a>"},"year":"2021","user_id":"23547","department":[{"_id":"35"},{"_id":"2"},{"_id":"307"}],"_id":"25894","language":[{"iso":"eng"}],"article_number":"110330","article_type":"original","type":"journal_article","publication":"Microporous and Mesoporous Materials","status":"public","abstract":[{"lang":"eng","text":"Powder X-ray diffraction (XRD) patterns of ordered mesoporous CMK-8 and CMK-9 carbon materials are simulated by geometric modeling. The materials are amorphous at the atomic length scale but exhibit highly symmetric gyroidal structures at the nanometer scale, corresponding to regular, continuous nanopore systems with cubic symmetry. Their structures lead to characteristic low-angle XRD signatures. We introduce a model based on geometrical considerations to simulate CMK-8 and CMK-9 structures with variable volume fraction of carbon (vs. pore volume, i.e., variable 'pore wall thickness'). In addition, we also simulate carbon materials with variable amounts of guest species (e.g., sulfur) residing in their pores. The corresponding XRD patterns are calculated. The carbon volume fraction turns out to have a significant impact on the relative diffraction peak intensities, especially in case of CMK-9 carbon that features a bimodal porosity. Likewise, the presence of guest species in the pores may also strongly affect the relative peak intensities. Our study suggests that careful evaluation of experimental low-angle XRD patterns of (real) CMK-8 or CMK-9 materials offers an opportunity to obtain detailed information about the nanostructural properties in addition to the mere identification of the pore systems geometry."}]},{"abstract":[{"lang":"eng","text":"A comparison of infrared spectroscopic analytical approaches was made in order to assess their applicability for internal structure characterization of SiO2 thin films. Markers for porosity and/or disorder based on the analysis of the asymmetric stretching absorption band of SiO2 between 900−1350 cm−1 were discussed. The shape of this band, which shows a well-defined LO–TO splitting, depends not only on the inherent characteristics of the film under analysis but also on the particular geometry of the IR experiment and the specific surface selection rules of the substrate. Three types of SiO2 thin films with clearly defined porosity ranging from dense films to mesoporous films were investigated by transmission (at different incidence angles), direct specular reflection (at different angles), and diffuse reflection. Two different types of substrate, metallic and semiconducting, were used. The combined effect of substrate and specific technique in the final shape of the band, was discussed, and the efficacy for their applicability to the determination of porosity in thin SiO2 films was critically evaluated."}],"status":"public","type":"journal_article","publication":"Vibrational Spectroscopy","article_type":"original","article_number":"103256","language":[{"iso":"eng"}],"_id":"25897","user_id":"23547","department":[{"_id":"35"},{"_id":"2"},{"_id":"307"},{"_id":"302"}],"year":"2021","citation":{"chicago":"Arcos, Teresa de los, Hendrik Müller, Fuzeng Wang, Varun Raj Damerla, Christian Hoppe, Christian Weinberger, Michael Tiemann, and Guido Grundmeier. “Review of Infrared Spectroscopy Techniques for the Determination of Internal Structure in Thin SiO2 Films.” <i>Vibrational Spectroscopy</i>, 2021. <a href=\"https://doi.org/10.1016/j.vibspec.2021.103256\">https://doi.org/10.1016/j.vibspec.2021.103256</a>.","ieee":"T. de los Arcos <i>et al.</i>, “Review of infrared spectroscopy techniques for the determination of internal structure in thin SiO2 films,” <i>Vibrational Spectroscopy</i>, Art. no. 103256, 2021, doi: <a href=\"https://doi.org/10.1016/j.vibspec.2021.103256\">10.1016/j.vibspec.2021.103256</a>.","ama":"de los Arcos T, Müller H, Wang F, et al. Review of infrared spectroscopy techniques for the determination of internal structure in thin SiO2 films. <i>Vibrational Spectroscopy</i>. Published online 2021. doi:<a href=\"https://doi.org/10.1016/j.vibspec.2021.103256\">10.1016/j.vibspec.2021.103256</a>","apa":"de los Arcos, T., Müller, H., Wang, F., Damerla, V. R., Hoppe, C., Weinberger, C., Tiemann, M., &#38; Grundmeier, G. (2021). Review of infrared spectroscopy techniques for the determination of internal structure in thin SiO2 films. <i>Vibrational Spectroscopy</i>, Article 103256. <a href=\"https://doi.org/10.1016/j.vibspec.2021.103256\">https://doi.org/10.1016/j.vibspec.2021.103256</a>","bibtex":"@article{de los Arcos_Müller_Wang_Damerla_Hoppe_Weinberger_Tiemann_Grundmeier_2021, title={Review of infrared spectroscopy techniques for the determination of internal structure in thin SiO2 films}, DOI={<a href=\"https://doi.org/10.1016/j.vibspec.2021.103256\">10.1016/j.vibspec.2021.103256</a>}, number={103256}, journal={Vibrational Spectroscopy}, author={de los Arcos, Teresa and Müller, Hendrik and Wang, Fuzeng and Damerla, Varun Raj and Hoppe, Christian and Weinberger, Christian and Tiemann, Michael and Grundmeier, Guido}, year={2021} }","short":"T. de los Arcos, H. Müller, F. Wang, V.R. Damerla, C. Hoppe, C. Weinberger, M. Tiemann, G. Grundmeier, Vibrational Spectroscopy (2021).","mla":"de los Arcos, Teresa, et al. “Review of Infrared Spectroscopy Techniques for the Determination of Internal Structure in Thin SiO2 Films.” <i>Vibrational Spectroscopy</i>, 103256, 2021, doi:<a href=\"https://doi.org/10.1016/j.vibspec.2021.103256\">10.1016/j.vibspec.2021.103256</a>."},"publication_status":"published","publication_identifier":{"issn":["0924-2031"]},"quality_controlled":"1","title":"Review of infrared spectroscopy techniques for the determination of internal structure in thin SiO2 films","doi":"10.1016/j.vibspec.2021.103256","date_updated":"2023-03-07T10:44:06Z","date_created":"2021-10-08T10:09:45Z","author":[{"last_name":"de los Arcos","full_name":"de los Arcos, Teresa","first_name":"Teresa"},{"first_name":"Hendrik","full_name":"Müller, Hendrik","last_name":"Müller"},{"full_name":"Wang, Fuzeng","last_name":"Wang","first_name":"Fuzeng"},{"first_name":"Varun Raj","last_name":"Damerla","full_name":"Damerla, Varun Raj"},{"first_name":"Christian","last_name":"Hoppe","full_name":"Hoppe, Christian"},{"first_name":"Christian","last_name":"Weinberger","id":"11848","full_name":"Weinberger, Christian"},{"first_name":"Michael","id":"23547","full_name":"Tiemann, Michael","last_name":"Tiemann","orcid":"0000-0003-1711-2722"},{"last_name":"Grundmeier","id":"194","full_name":"Grundmeier, Guido","first_name":"Guido"}]},{"quality_controlled":"1","publication_identifier":{"issn":["2196-7350","2196-7350"]},"publication_status":"published","year":"2021","citation":{"mla":"Tiemann, Michael, and Christian Weinberger. “Selective Modification of Hierarchical Pores and Surfaces in Nanoporous Materials.” <i>Advanced Materials Interfaces</i>, 2001153, 2021, doi:<a href=\"https://doi.org/10.1002/admi.202001153\">10.1002/admi.202001153</a>.","short":"M. Tiemann, C. Weinberger, Advanced Materials Interfaces (2021).","bibtex":"@article{Tiemann_Weinberger_2021, title={Selective Modification of Hierarchical Pores and Surfaces in Nanoporous Materials}, DOI={<a href=\"https://doi.org/10.1002/admi.202001153\">10.1002/admi.202001153</a>}, number={2001153}, journal={Advanced Materials Interfaces}, author={Tiemann, Michael and Weinberger, Christian}, year={2021} }","apa":"Tiemann, M., &#38; Weinberger, C. (2021). Selective Modification of Hierarchical Pores and Surfaces in Nanoporous Materials. <i>Advanced Materials Interfaces</i>, Article 2001153. <a href=\"https://doi.org/10.1002/admi.202001153\">https://doi.org/10.1002/admi.202001153</a>","ama":"Tiemann M, Weinberger C. Selective Modification of Hierarchical Pores and Surfaces in Nanoporous Materials. <i>Advanced Materials Interfaces</i>. Published online 2021. doi:<a href=\"https://doi.org/10.1002/admi.202001153\">10.1002/admi.202001153</a>","ieee":"M. Tiemann and C. Weinberger, “Selective Modification of Hierarchical Pores and Surfaces in Nanoporous Materials,” <i>Advanced Materials Interfaces</i>, Art. no. 2001153, 2021, doi: <a href=\"https://doi.org/10.1002/admi.202001153\">10.1002/admi.202001153</a>.","chicago":"Tiemann, Michael, and Christian Weinberger. “Selective Modification of Hierarchical Pores and Surfaces in Nanoporous Materials.” <i>Advanced Materials Interfaces</i>, 2021. <a href=\"https://doi.org/10.1002/admi.202001153\">https://doi.org/10.1002/admi.202001153</a>."},"date_updated":"2023-03-07T10:45:40Z","oa":"1","author":[{"first_name":"Michael","id":"23547","full_name":"Tiemann, Michael","last_name":"Tiemann","orcid":"0000-0003-1711-2722"},{"full_name":"Weinberger, Christian","id":"11848","last_name":"Weinberger","first_name":"Christian"}],"date_created":"2021-10-08T10:01:21Z","title":"Selective Modification of Hierarchical Pores and Surfaces in Nanoporous Materials","doi":"10.1002/admi.202001153","main_file_link":[{"url":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/admi.202001153","open_access":"1"}],"publication":"Advanced Materials Interfaces","type":"journal_article","abstract":[{"text":"Tailor-made ordered mesoporous materials bear great potential in numerous fields of application where large interfaces are required. However, the inherent surfacechemical properties of conventional materials, such as silica, carbon or organosilica, poses some limitations with respect to their application. Surface manipulation by functionalization with chemically more reactive groups is one way to improve materials for their desired purpose. Another approach is the design of high surface-area composite materials. The surface manipulation, either by functionalization or by introducing guest species, can be performed selectively. This means that when several distinct, i.e. , hierarchical, types of surfaces or pore systems exist in a material, each of them may be chosen for manipulation. Several strategies can be identified to achieve this goal. Molecules or molecule assemblies can be utilized to temporarily protect pores or surfaces (soft protection), while manipulation occurs at the accessible sites. This approach is a recurring motive in this review and can also be applied to rigid template matrices (hard protection). Furthermore, the size of functionalization agents (size protection) and their reactivity/diffusion (kinetic protection) into the pores can also be utilized to achieve selectivity. In addition, challenges in the synthesis and characterization of selectively manipulated ordered mesoporous materials are discussed.","lang":"eng"}],"status":"public","_id":"25893","department":[{"_id":"35"},{"_id":"2"},{"_id":"307"}],"user_id":"23547","article_number":"2001153","article_type":"review","language":[{"iso":"eng"}]},{"language":[{"iso":"eng"}],"article_number":"105722","article_type":"original","user_id":"23547","department":[{"_id":"9"},{"_id":"35"},{"_id":"2"},{"_id":"307"}],"_id":"25896","status":"public","abstract":[{"lang":"eng","text":"In this report, a flame spray pyrolysis setup has been examined with various in situ extraction methods of particle samples along the flame axis. First, two precursor formulations leading to the formation of iron oxide nanoparticles were used in a standardized SpraySyn burner system, and the final particle outcome was characterized by a broad range of established powder characterization techniques (TEM/HRTEM, SAXS, XRD, BET). The characterization of the powder products evidenced that mostly homogeneous gas-to-particle conversion takes place when applying an acidic precursor solution, whereas the absence of the acid leads to a dominant droplet-to-particle pathway. Our study indicates that a droplet-to-particle-pathway could be present even when processing the acidic formulation. However, even if a secondary pathway might take place in this case as well, it is not dominant and nearly negligible. Subsequently, the in situ particle structure evolution was investigated for the dominant gas-to-particle pathway, and particles were extracted along the flame axis for online SMPS and offline TEM/HRTEM analysis. Due to the highly reactive conditions within the flame (high temperatures, turbulent flow field, high particle number concentrations), the extraction of representative samples from spray flames is challenging. In order to handle the reactive conditions, two extraction techniques were tailored in this report. To extract an aerosol sample within the flame for SMPS measurement, a Hole in a Tube probe was adjusted. Thus, the mobility particle diameter as well as the corresponding distribution widths were obtained at different heights above the burner along the flame axis. For TEM/HRTEM image analysis, particle samples were collected thermophoretically by means of a tailored shutter system. Since all sampling grids were protected until reaching the flame axis and due to the low sampling time, momentary captures of local particle structures could be extracted precisely. The particle morphologies have clearly shown an evolution from spherical and paired particles in the flame center to fractal and compact agglomerates at later synthesis stages."}],"type":"journal_article","publication":"Journal of Aerosol Science","doi":"10.1016/j.jaerosci.2020.105722","title":"Examination of the evolution of iron oxide nanoparticles in flame spray pyrolysis by tailored in situ particle sampling techniques","date_created":"2021-10-08T10:07:18Z","author":[{"first_name":"R.","last_name":"Tischendorf","full_name":"Tischendorf, R."},{"first_name":"M.","full_name":"Simmler, M.","last_name":"Simmler"},{"last_name":"Weinberger","full_name":"Weinberger, Christian","id":"11848","first_name":"Christian"},{"full_name":"Bieber, M.","last_name":"Bieber","first_name":"M."},{"first_name":"M.","last_name":"Reddemann","full_name":"Reddemann, M."},{"first_name":"F.","full_name":"Fröde, F.","last_name":"Fröde"},{"first_name":"J.","full_name":"Lindner, J.","last_name":"Lindner"},{"full_name":"Pitsch, H.","last_name":"Pitsch","first_name":"H."},{"first_name":"R.","last_name":"Kneer","full_name":"Kneer, R."},{"first_name":"Michael","last_name":"Tiemann","orcid":"0000-0003-1711-2722","full_name":"Tiemann, Michael","id":"23547"},{"first_name":"H.","last_name":"Nirschl","full_name":"Nirschl, H."},{"full_name":"Schmid, H.-J.","last_name":"Schmid","first_name":"H.-J."}],"date_updated":"2023-03-08T08:07:30Z","citation":{"chicago":"Tischendorf, R., M. Simmler, Christian Weinberger, M. Bieber, M. Reddemann, F. Fröde, J. Lindner, et al. “Examination of the Evolution of Iron Oxide Nanoparticles in Flame Spray Pyrolysis by Tailored in Situ Particle Sampling Techniques.” <i>Journal of Aerosol Science</i>, 2021. <a href=\"https://doi.org/10.1016/j.jaerosci.2020.105722\">https://doi.org/10.1016/j.jaerosci.2020.105722</a>.","ieee":"R. Tischendorf <i>et al.</i>, “Examination of the evolution of iron oxide nanoparticles in flame spray pyrolysis by tailored in situ particle sampling techniques,” <i>Journal of Aerosol Science</i>, Art. no. 105722, 2021, doi: <a href=\"https://doi.org/10.1016/j.jaerosci.2020.105722\">10.1016/j.jaerosci.2020.105722</a>.","ama":"Tischendorf R, Simmler M, Weinberger C, et al. Examination of the evolution of iron oxide nanoparticles in flame spray pyrolysis by tailored in situ particle sampling techniques. <i>Journal of Aerosol Science</i>. Published online 2021. doi:<a href=\"https://doi.org/10.1016/j.jaerosci.2020.105722\">10.1016/j.jaerosci.2020.105722</a>","apa":"Tischendorf, R., Simmler, M., Weinberger, C., Bieber, M., Reddemann, M., Fröde, F., Lindner, J., Pitsch, H., Kneer, R., Tiemann, M., Nirschl, H., &#38; Schmid, H.-J. (2021). Examination of the evolution of iron oxide nanoparticles in flame spray pyrolysis by tailored in situ particle sampling techniques. <i>Journal of Aerosol Science</i>, Article 105722. <a href=\"https://doi.org/10.1016/j.jaerosci.2020.105722\">https://doi.org/10.1016/j.jaerosci.2020.105722</a>","short":"R. Tischendorf, M. Simmler, C. Weinberger, M. Bieber, M. Reddemann, F. Fröde, J. Lindner, H. Pitsch, R. Kneer, M. Tiemann, H. Nirschl, H.-J. Schmid, Journal of Aerosol Science (2021).","bibtex":"@article{Tischendorf_Simmler_Weinberger_Bieber_Reddemann_Fröde_Lindner_Pitsch_Kneer_Tiemann_et al._2021, title={Examination of the evolution of iron oxide nanoparticles in flame spray pyrolysis by tailored in situ particle sampling techniques}, DOI={<a href=\"https://doi.org/10.1016/j.jaerosci.2020.105722\">10.1016/j.jaerosci.2020.105722</a>}, number={105722}, journal={Journal of Aerosol Science}, author={Tischendorf, R. and Simmler, M. and Weinberger, Christian and Bieber, M. and Reddemann, M. and Fröde, F. and Lindner, J. and Pitsch, H. and Kneer, R. and Tiemann, Michael and et al.}, year={2021} }","mla":"Tischendorf, R., et al. “Examination of the Evolution of Iron Oxide Nanoparticles in Flame Spray Pyrolysis by Tailored in Situ Particle Sampling Techniques.” <i>Journal of Aerosol Science</i>, 105722, 2021, doi:<a href=\"https://doi.org/10.1016/j.jaerosci.2020.105722\">10.1016/j.jaerosci.2020.105722</a>."},"year":"2021","publication_status":"published","publication_identifier":{"issn":["0021-8502"]},"quality_controlled":"1"},{"status":"public","type":"journal_article","article_type":"original","user_id":"23547","department":[{"_id":"302"},{"_id":"307"},{"_id":"35"},{"_id":"2"}],"_id":"22635","citation":{"mla":"Garcia Diosa, Jaime Andres, et al. “TiO2 Nanoparticle Coatings on Glass Surfaces for the Selective Trapping of Leukemia Cells from Peripheral Blood.” <i>Journal of Biomedical Materials Research Part B: Applied Biomaterials</i>, vol. 109, 2021, pp. 2142–2153, doi:<a href=\"https://doi.org/10.1002/jbm.b.34862\">10.1002/jbm.b.34862</a>.","short":"J.A. Garcia Diosa, A. Gonzalez Orive, C. Weinberger, S. Schwiderek, S. Knust, M. Tiemann, G. Grundmeier, A. Keller, R.J. Camargo Amado, Journal of Biomedical Materials Research Part B: Applied Biomaterials 109 (2021) 2142–2153.","bibtex":"@article{Garcia Diosa_Gonzalez Orive_Weinberger_Schwiderek_Knust_Tiemann_Grundmeier_Keller_Camargo Amado_2021, title={TiO2 nanoparticle coatings on glass surfaces for the selective trapping of leukemia cells from peripheral blood}, volume={109}, DOI={<a href=\"https://doi.org/10.1002/jbm.b.34862\">10.1002/jbm.b.34862</a>}, journal={Journal of Biomedical Materials Research Part B: Applied Biomaterials}, author={Garcia Diosa, Jaime Andres and Gonzalez Orive, Alejandro and Weinberger, Christian and Schwiderek, Sabrina and Knust, Steffen and Tiemann, Michael and Grundmeier, Guido and Keller, Adrian and Camargo Amado, Ruben Jesus}, year={2021}, pages={2142–2153} }","apa":"Garcia Diosa, J. A., Gonzalez Orive, A., Weinberger, C., Schwiderek, S., Knust, S., Tiemann, M., Grundmeier, G., Keller, A., &#38; Camargo Amado, R. J. (2021). TiO2 nanoparticle coatings on glass surfaces for the selective trapping of leukemia cells from peripheral blood. <i>Journal of Biomedical Materials Research Part B: Applied Biomaterials</i>, <i>109</i>, 2142–2153. <a href=\"https://doi.org/10.1002/jbm.b.34862\">https://doi.org/10.1002/jbm.b.34862</a>","chicago":"Garcia Diosa, Jaime Andres, Alejandro Gonzalez Orive, Christian Weinberger, Sabrina Schwiderek, Steffen Knust, Michael Tiemann, Guido Grundmeier, Adrian Keller, and Ruben Jesus Camargo Amado. “TiO2 Nanoparticle Coatings on Glass Surfaces for the Selective Trapping of Leukemia Cells from Peripheral Blood.” <i>Journal of Biomedical Materials Research Part B: Applied Biomaterials</i> 109 (2021): 2142–2153. <a href=\"https://doi.org/10.1002/jbm.b.34862\">https://doi.org/10.1002/jbm.b.34862</a>.","ieee":"J. A. Garcia Diosa <i>et al.</i>, “TiO2 nanoparticle coatings on glass surfaces for the selective trapping of leukemia cells from peripheral blood,” <i>Journal of Biomedical Materials Research Part B: Applied Biomaterials</i>, vol. 109, pp. 2142–2153, 2021, doi: <a href=\"https://doi.org/10.1002/jbm.b.34862\">10.1002/jbm.b.34862</a>.","ama":"Garcia Diosa JA, Gonzalez Orive A, Weinberger C, et al. TiO2 nanoparticle coatings on glass surfaces for the selective trapping of leukemia cells from peripheral blood. <i>Journal of Biomedical Materials Research Part B: Applied Biomaterials</i>. 2021;109:2142–2153. doi:<a href=\"https://doi.org/10.1002/jbm.b.34862\">10.1002/jbm.b.34862</a>"},"intvolume":"       109","page":"2142–2153","publication_status":"published","publication_identifier":{"issn":["1552-4973","1552-4981"]},"doi":"10.1002/jbm.b.34862","author":[{"first_name":"Jaime Andres","full_name":"Garcia Diosa, Jaime Andres","last_name":"Garcia Diosa"},{"last_name":"Gonzalez Orive","full_name":"Gonzalez Orive, Alejandro","first_name":"Alejandro"},{"id":"11848","full_name":"Weinberger, Christian","last_name":"Weinberger","first_name":"Christian"},{"first_name":"Sabrina","full_name":"Schwiderek, Sabrina","last_name":"Schwiderek"},{"first_name":"Steffen","full_name":"Knust, Steffen","last_name":"Knust"},{"first_name":"Michael","id":"23547","full_name":"Tiemann, Michael","last_name":"Tiemann","orcid":"0000-0003-1711-2722"},{"full_name":"Grundmeier, Guido","id":"194","last_name":"Grundmeier","first_name":"Guido"},{"first_name":"Adrian","id":"48864","full_name":"Keller, Adrian","orcid":"0000-0001-7139-3110","last_name":"Keller"},{"last_name":"Camargo Amado","full_name":"Camargo Amado, Ruben Jesus","first_name":"Ruben Jesus"}],"volume":109,"date_updated":"2023-03-08T08:10:25Z","abstract":[{"lang":"eng","text":"Photodynamic therapy (PDT) using TiO2 nanoparticles has become an important alternative treatment for different types of cancer due to their high photocatalytic activity and high absorption of UV-A light. To potentiate this treatment, we have coated commercial glass plates with TiO2 nanoparticles prepared by the sol–gel method (TiO2-m), which exhibit a remarkable selectivity for the irreversible trapping of cancer cells. The physicochemical properties of the deposited TiO2-m nanoparticle coatings have been characterized by a number of complementary surface-analytical techniques and their interaction with leukemia and healthy blood cells were investigated. Scanning electron and atomic force microscopy verify the formation of a compact layer of TiO2-m nanoparticles. The particles are predominantly in the anatase phase and have hydroxyl-terminated surfaces as revealed by Raman, X-ray photoelectron, and infrared spectroscopy, as well as X-ray diffraction. We find that lymphoblastic leukemia cells adhere to the TiO2-m coating and undergo amoeboid-like migration, whereas lymphocytic cells show distinctly weaker interactions with the coating. This evidences the potential of this nanomaterial coating to selectively trap cancer cells and renders it a promising candidate for the development of future prototypes of PDT devices for the treatment of leukemia and other types of cancers with non-adherent cells."}],"publication":"Journal of Biomedical Materials Research Part B: Applied Biomaterials","language":[{"iso":"eng"}],"year":"2021","quality_controlled":"1","title":"TiO2 nanoparticle coatings on glass surfaces for the selective trapping of leukemia cells from peripheral blood","date_created":"2021-07-08T11:34:21Z"},{"quality_controlled":"1","publication_identifier":{"issn":["1477-9226","1477-9234"]},"publication_status":"published","year":"2021","page":"13572-13579","citation":{"bibtex":"@article{Steinke_Javed_Wöhlbrandt_Tiemann_Stock_2021, title={New isoreticular phosphonate MOFs based on a tetratopic linker}, DOI={<a href=\"https://doi.org/10.1039/d1dt02610k\">10.1039/d1dt02610k</a>}, journal={Dalton Transactions}, author={Steinke, Felix and Javed, Ali and Wöhlbrandt, Stephan and Tiemann, Michael and Stock, Norbert}, year={2021}, pages={13572–13579} }","short":"F. Steinke, A. Javed, S. Wöhlbrandt, M. Tiemann, N. Stock, Dalton Transactions (2021) 13572–13579.","mla":"Steinke, Felix, et al. “New Isoreticular Phosphonate MOFs Based on a Tetratopic Linker.” <i>Dalton Transactions</i>, 2021, pp. 13572–79, doi:<a href=\"https://doi.org/10.1039/d1dt02610k\">10.1039/d1dt02610k</a>.","apa":"Steinke, F., Javed, A., Wöhlbrandt, S., Tiemann, M., &#38; Stock, N. (2021). New isoreticular phosphonate MOFs based on a tetratopic linker. <i>Dalton Transactions</i>, 13572–13579. <a href=\"https://doi.org/10.1039/d1dt02610k\">https://doi.org/10.1039/d1dt02610k</a>","ama":"Steinke F, Javed A, Wöhlbrandt S, Tiemann M, Stock N. New isoreticular phosphonate MOFs based on a tetratopic linker. <i>Dalton Transactions</i>. Published online 2021:13572-13579. doi:<a href=\"https://doi.org/10.1039/d1dt02610k\">10.1039/d1dt02610k</a>","chicago":"Steinke, Felix, Ali Javed, Stephan Wöhlbrandt, Michael Tiemann, and Norbert Stock. “New Isoreticular Phosphonate MOFs Based on a Tetratopic Linker.” <i>Dalton Transactions</i>, 2021, 13572–79. <a href=\"https://doi.org/10.1039/d1dt02610k\">https://doi.org/10.1039/d1dt02610k</a>.","ieee":"F. Steinke, A. Javed, S. Wöhlbrandt, M. Tiemann, and N. Stock, “New isoreticular phosphonate MOFs based on a tetratopic linker,” <i>Dalton Transactions</i>, pp. 13572–13579, 2021, doi: <a href=\"https://doi.org/10.1039/d1dt02610k\">10.1039/d1dt02610k</a>."},"date_updated":"2023-03-08T08:08:22Z","date_created":"2021-10-08T09:57:34Z","author":[{"first_name":"Felix","full_name":"Steinke, Felix","last_name":"Steinke"},{"first_name":"Ali","full_name":"Javed, Ali","last_name":"Javed"},{"first_name":"Stephan","last_name":"Wöhlbrandt","full_name":"Wöhlbrandt, Stephan"},{"id":"23547","full_name":"Tiemann, Michael","orcid":"0000-0003-1711-2722","last_name":"Tiemann","first_name":"Michael"},{"last_name":"Stock","full_name":"Stock, Norbert","first_name":"Norbert"}],"title":"New isoreticular phosphonate MOFs based on a tetratopic linker","doi":"10.1039/d1dt02610k","publication":"Dalton Transactions","type":"journal_article","abstract":[{"text":"The tetratopic linker 1,1,2,2-tetrakis(4-phosphonophenyl)ethylene (H8TPPE) was used to synthesize the three new porous metal–organic frameworks of composition [M2(H2O)2(H2TPPE)]·xH2O (M = Al3+, Ga3+, Fe3+), denoted as M-CAU-53 under hydrothermal reaction conditions, using the corresponding metal nitrates as starting materials. The crystal structures of the compounds were determined ab initio from powder X-ray diffraction data, revealing small structural differences. Proton conductivity measurements were carried out, indicating different conductivity mechanisms. The differences in proton conductivity could be linked to the individual structures. In addition, a thorough characterization via thermogravimetry, elemental analysis, IR-spectroscopy as well as N2- and H2O-sorption is given.","lang":"eng"}],"status":"public","_id":"25892","department":[{"_id":"2"},{"_id":"307"}],"user_id":"23547","article_type":"original","language":[{"iso":"eng"}]},{"abstract":[{"text":"Thermally stabilized and subsequently carbonized nanofibers are a promising material for many technical applications in fields such as tissue engineering or energy storage. They can be obtained from a variety of different polymer precursors via electrospinning. While some methods have been tested for post-carbonization doping of nanofibers with the desired ingredients, very little is known about carbonization of blend nanofibers from two or more polymeric precursors. In this paper, we report on the preparation, thermal treatment and resulting properties of poly(acrylonitrile) (PAN)/poly(vinylidene fluoride) (PVDF) blend nanofibers produced by wire-based electrospinning of binary polymer solutions. Using a wide variety of spectroscopic, microscopic and thermal characterization methods, the chemical and morphological transition during oxidative stabilization (280 °C) and incipient carbonization (500 °C) was thoroughly investigated. Both PAN and PVDF precursor polymers were detected and analyzed qualitatively and quantitatively during all stages of thermal treatment. Compared to pure PAN nanofibers, the blend nanofibers showed increased fiber diameters, strong reduction of undesired morphological changes during oxidative stabilization and increased conductivity after carbonization.","lang":"eng"}],"status":"public","type":"journal_article","publication":"Nanomaterials","article_number":"1210","article_type":"original","language":[{"iso":"eng"}],"_id":"25901","user_id":"23547","department":[{"_id":"35"},{"_id":"2"},{"_id":"307"},{"_id":"315"},{"_id":"232"}],"year":"2020","citation":{"short":"M. Wortmann, N. Frese, A. Mamun, M. Trabelsi, W. Keil, B. Büker, A. Javed, M. Tiemann, E. Moritzer, A. Ehrmann, A. Hütten, C. Schmidt, A. Gölzhäuser, B. Hüsgen, L. Sabantina, Nanomaterials (2020).","mla":"Wortmann, Martin, et al. “Chemical and Morphological Transition of Poly(Acrylonitrile)/Poly(Vinylidene Fluoride) Blend Nanofibers during Oxidative Stabilization and Incipient Carbonization.” <i>Nanomaterials</i>, 1210, 2020, doi:<a href=\"https://doi.org/10.3390/nano10061210\">10.3390/nano10061210</a>.","bibtex":"@article{Wortmann_Frese_Mamun_Trabelsi_Keil_Büker_Javed_Tiemann_Moritzer_Ehrmann_et al._2020, title={Chemical and Morphological Transition of Poly(acrylonitrile)/Poly(vinylidene Fluoride) Blend Nanofibers during Oxidative Stabilization and Incipient Carbonization}, DOI={<a href=\"https://doi.org/10.3390/nano10061210\">10.3390/nano10061210</a>}, number={1210}, journal={Nanomaterials}, author={Wortmann, Martin and Frese, Natalie and Mamun, Al and Trabelsi, Marah and Keil, Waldemar and Büker, Björn and Javed, Ali and Tiemann, Michael and Moritzer, Elmar and Ehrmann, Andrea and et al.}, year={2020} }","apa":"Wortmann, M., Frese, N., Mamun, A., Trabelsi, M., Keil, W., Büker, B., Javed, A., Tiemann, M., Moritzer, E., Ehrmann, A., Hütten, A., Schmidt, C., Gölzhäuser, A., Hüsgen, B., &#38; Sabantina, L. (2020). Chemical and Morphological Transition of Poly(acrylonitrile)/Poly(vinylidene Fluoride) Blend Nanofibers during Oxidative Stabilization and Incipient Carbonization. <i>Nanomaterials</i>, Article 1210. <a href=\"https://doi.org/10.3390/nano10061210\">https://doi.org/10.3390/nano10061210</a>","ama":"Wortmann M, Frese N, Mamun A, et al. Chemical and Morphological Transition of Poly(acrylonitrile)/Poly(vinylidene Fluoride) Blend Nanofibers during Oxidative Stabilization and Incipient Carbonization. <i>Nanomaterials</i>. Published online 2020. doi:<a href=\"https://doi.org/10.3390/nano10061210\">10.3390/nano10061210</a>","chicago":"Wortmann, Martin, Natalie Frese, Al Mamun, Marah Trabelsi, Waldemar Keil, Björn Büker, Ali Javed, et al. “Chemical and Morphological Transition of Poly(Acrylonitrile)/Poly(Vinylidene Fluoride) Blend Nanofibers during Oxidative Stabilization and Incipient Carbonization.” <i>Nanomaterials</i>, 2020. <a href=\"https://doi.org/10.3390/nano10061210\">https://doi.org/10.3390/nano10061210</a>.","ieee":"M. Wortmann <i>et al.</i>, “Chemical and Morphological Transition of Poly(acrylonitrile)/Poly(vinylidene Fluoride) Blend Nanofibers during Oxidative Stabilization and Incipient Carbonization,” <i>Nanomaterials</i>, Art. no. 1210, 2020, doi: <a href=\"https://doi.org/10.3390/nano10061210\">10.3390/nano10061210</a>."},"publication_status":"published","publication_identifier":{"issn":["2079-4991"]},"quality_controlled":"1","title":"Chemical and Morphological Transition of Poly(acrylonitrile)/Poly(vinylidene Fluoride) Blend Nanofibers during Oxidative Stabilization and Incipient Carbonization","main_file_link":[{"url":"https://www.mdpi.com/2079-4991/10/6/1210/pdf?version=1592726383","open_access":"1"}],"doi":"10.3390/nano10061210","date_updated":"2023-03-08T08:18:03Z","oa":"1","author":[{"first_name":"Martin","full_name":"Wortmann, Martin","last_name":"Wortmann"},{"full_name":"Frese, Natalie","last_name":"Frese","first_name":"Natalie"},{"last_name":"Mamun","full_name":"Mamun, Al","first_name":"Al"},{"first_name":"Marah","last_name":"Trabelsi","full_name":"Trabelsi, Marah"},{"first_name":"Waldemar","full_name":"Keil, Waldemar","last_name":"Keil"},{"first_name":"Björn","full_name":"Büker, Björn","last_name":"Büker"},{"first_name":"Ali","last_name":"Javed","full_name":"Javed, Ali"},{"id":"23547","full_name":"Tiemann, Michael","orcid":"0000-0003-1711-2722","last_name":"Tiemann","first_name":"Michael"},{"first_name":"Elmar","full_name":"Moritzer, Elmar","id":"20531","last_name":"Moritzer"},{"full_name":"Ehrmann, Andrea","last_name":"Ehrmann","first_name":"Andrea"},{"first_name":"Andreas","full_name":"Hütten, Andreas","last_name":"Hütten"},{"id":"466","full_name":"Schmidt, Claudia","orcid":"0000-0003-3179-9997","last_name":"Schmidt","first_name":"Claudia"},{"first_name":"Armin","last_name":"Gölzhäuser","full_name":"Gölzhäuser, Armin"},{"first_name":"Bruno","last_name":"Hüsgen","full_name":"Hüsgen, Bruno"},{"full_name":"Sabantina, Lilia","last_name":"Sabantina","first_name":"Lilia"}],"date_created":"2021-10-08T10:36:26Z"},{"publication_status":"published","publication_identifier":{"issn":["2079-4991"]},"citation":{"ieee":"A. Javed, I. Strauss, H. Bunzen, J. Caro, and M. Tiemann, “Humidity-Mediated Anisotropic Proton Conductivity through the 1D Channels of Co-MOF-74,” <i>Nanomaterials</i>, Art. no. 1263, 2020, doi: <a href=\"https://doi.org/10.3390/nano10071263\">10.3390/nano10071263</a>.","chicago":"Javed, Ali, Ina Strauss, Hana Bunzen, Jürgen Caro, and Michael Tiemann. “Humidity-Mediated Anisotropic Proton Conductivity through the 1D Channels of Co-MOF-74.” <i>Nanomaterials</i>, 2020. <a href=\"https://doi.org/10.3390/nano10071263\">https://doi.org/10.3390/nano10071263</a>.","ama":"Javed A, Strauss I, Bunzen H, Caro J, Tiemann M. Humidity-Mediated Anisotropic Proton Conductivity through the 1D Channels of Co-MOF-74. <i>Nanomaterials</i>. Published online 2020. doi:<a href=\"https://doi.org/10.3390/nano10071263\">10.3390/nano10071263</a>","bibtex":"@article{Javed_Strauss_Bunzen_Caro_Tiemann_2020, title={Humidity-Mediated Anisotropic Proton Conductivity through the 1D Channels of Co-MOF-74}, DOI={<a href=\"https://doi.org/10.3390/nano10071263\">10.3390/nano10071263</a>}, number={1263}, journal={Nanomaterials}, author={Javed, Ali and Strauss, Ina and Bunzen, Hana and Caro, Jürgen and Tiemann, Michael}, year={2020} }","short":"A. Javed, I. Strauss, H. Bunzen, J. Caro, M. Tiemann, Nanomaterials (2020).","mla":"Javed, Ali, et al. “Humidity-Mediated Anisotropic Proton Conductivity through the 1D Channels of Co-MOF-74.” <i>Nanomaterials</i>, 1263, 2020, doi:<a href=\"https://doi.org/10.3390/nano10071263\">10.3390/nano10071263</a>.","apa":"Javed, A., Strauss, I., Bunzen, H., Caro, J., &#38; Tiemann, M. (2020). Humidity-Mediated Anisotropic Proton Conductivity through the 1D Channels of Co-MOF-74. <i>Nanomaterials</i>, Article 1263. <a href=\"https://doi.org/10.3390/nano10071263\">https://doi.org/10.3390/nano10071263</a>"},"author":[{"first_name":"Ali","last_name":"Javed","full_name":"Javed, Ali"},{"full_name":"Strauss, Ina","last_name":"Strauss","first_name":"Ina"},{"last_name":"Bunzen","full_name":"Bunzen, Hana","first_name":"Hana"},{"first_name":"Jürgen","full_name":"Caro, Jürgen","last_name":"Caro"},{"full_name":"Tiemann, Michael","id":"23547","orcid":"0000-0003-1711-2722","last_name":"Tiemann","first_name":"Michael"}],"oa":"1","date_updated":"2023-03-08T08:22:31Z","main_file_link":[{"open_access":"1","url":"https://www.mdpi.com/2079-4991/10/7/1263/pdf?version=1594009427"}],"doi":"10.3390/nano10071263","type":"journal_article","status":"public","user_id":"23547","department":[{"_id":"35"},{"_id":"2"},{"_id":"307"}],"_id":"25899","article_type":"original","article_number":"1263","quality_controlled":"1","year":"2020","date_created":"2021-10-08T10:33:26Z","title":"Humidity-Mediated Anisotropic Proton Conductivity through the 1D Channels of Co-MOF-74","publication":"Nanomaterials","abstract":[{"text":"Large Co-MOF-74 crystals of a few hundred micrometers were prepared by solvothermal synthesis, and their structure and morphology were characterized by scanning electron microscopy (SEM), IR, and Raman spectroscopy. The hydrothermal stability of the material up to 60 °C at 93% relative humidity was verified by temperature-dependent XRD. Proton conductivity was studied by impedance spectroscopy, using a single crystal. By varying the relative humidity (70–95%), temperature (21–60 °C), and orientation of the crystal relative to the electrical potential, it was found that proton conduction occurs predominantly through the linear, unidirectional (1D) micropore channels of Co-MOF-74, and that water molecules inside the channels are responsible for the proton mobility by a Grotthuss-type mechanism.","lang":"eng"}],"language":[{"iso":"eng"}]},{"article_type":"original","language":[{"iso":"eng"}],"_id":"25903","user_id":"23547","department":[{"_id":"35"},{"_id":"2"},{"_id":"307"}],"abstract":[{"text":"Porous tin dioxide is an important low-cost semiconductor applied in electronics, gas sensors, and biosensors. Here, we present a versatile template-assisted synthesis of nanostructured tin dioxide thin films using cellulose nanocrystals (CNCs). We demonstrate that the structural features of CNC-templated tin dioxide films strongly depend on the precursor composition. The precursor properties were studied by using low-temperature nuclear magnetic resonance spectroscopy of tin tetrachloride in solution. We demonstrate that it is possible to optimize the precursor conditions to obtain homogeneous precursor mixtures and therefore highly porous thin films with pore dimensions in the range of 10–20 nm (ABET = 46–64 m2 g–1, measured on powder). Finally, by exploiting the high surface area of the material, we developed a resistive gas sensor based on CNC-templated tin dioxide. The sensor shows high sensitivity to carbon monoxide (CO) in ppm concentrations and low cross-sensitivity to humidity. Most importantly, the sensing kinetics are remarkably fast; both the response to the analyte gas and the signal decay after gas exposure occur within a few seconds, faster than in standard SnO2-based CO sensors. This is attributed to the high gas accessibility of the very thin porous film.","lang":"eng"}],"status":"public","type":"journal_article","publication":"ACS Applied Materials & Interfaces","title":"Cellulose Nanocrystal-Templated Tin Dioxide Thin Films for Gas Sensing","doi":"10.1021/acsami.9b11891","date_updated":"2023-03-08T08:23:16Z","date_created":"2021-10-08T10:39:27Z","author":[{"last_name":"Ivanova","full_name":"Ivanova, Alesja","first_name":"Alesja"},{"last_name":"Frka-Petesic","full_name":"Frka-Petesic, Bruno","first_name":"Bruno"},{"first_name":"Andrej","last_name":"Paul","full_name":"Paul, Andrej"},{"first_name":"Thorsten","last_name":"Wagner","full_name":"Wagner, Thorsten"},{"full_name":"Jumabekov, Askhat N.","last_name":"Jumabekov","first_name":"Askhat N."},{"last_name":"Vilk","full_name":"Vilk, Yury","first_name":"Yury"},{"first_name":"Johannes","full_name":"Weber, Johannes","last_name":"Weber"},{"last_name":"Schmedt auf der Günne","full_name":"Schmedt auf der Günne, Jörn","first_name":"Jörn"},{"first_name":"Silvia","last_name":"Vignolini","full_name":"Vignolini, Silvia"},{"first_name":"Michael","full_name":"Tiemann, Michael","id":"23547","orcid":"0000-0003-1711-2722","last_name":"Tiemann"},{"last_name":"Fattakhova-Rohlfing","full_name":"Fattakhova-Rohlfing, Dina","first_name":"Dina"},{"first_name":"Thomas","full_name":"Bein, Thomas","last_name":"Bein"}],"year":"2020","citation":{"ama":"Ivanova A, Frka-Petesic B, Paul A, et al. Cellulose Nanocrystal-Templated Tin Dioxide Thin Films for Gas Sensing. <i>ACS Applied Materials &#38; Interfaces</i>. Published online 2020:12639-12647. doi:<a href=\"https://doi.org/10.1021/acsami.9b11891\">10.1021/acsami.9b11891</a>","ieee":"A. Ivanova <i>et al.</i>, “Cellulose Nanocrystal-Templated Tin Dioxide Thin Films for Gas Sensing,” <i>ACS Applied Materials &#38; Interfaces</i>, pp. 12639–12647, 2020, doi: <a href=\"https://doi.org/10.1021/acsami.9b11891\">10.1021/acsami.9b11891</a>.","chicago":"Ivanova, Alesja, Bruno Frka-Petesic, Andrej Paul, Thorsten Wagner, Askhat N. Jumabekov, Yury Vilk, Johannes Weber, et al. “Cellulose Nanocrystal-Templated Tin Dioxide Thin Films for Gas Sensing.” <i>ACS Applied Materials &#38; Interfaces</i>, 2020, 12639–47. <a href=\"https://doi.org/10.1021/acsami.9b11891\">https://doi.org/10.1021/acsami.9b11891</a>.","bibtex":"@article{Ivanova_Frka-Petesic_Paul_Wagner_Jumabekov_Vilk_Weber_Schmedt auf der Günne_Vignolini_Tiemann_et al._2020, title={Cellulose Nanocrystal-Templated Tin Dioxide Thin Films for Gas Sensing}, DOI={<a href=\"https://doi.org/10.1021/acsami.9b11891\">10.1021/acsami.9b11891</a>}, journal={ACS Applied Materials &#38; Interfaces}, author={Ivanova, Alesja and Frka-Petesic, Bruno and Paul, Andrej and Wagner, Thorsten and Jumabekov, Askhat N. and Vilk, Yury and Weber, Johannes and Schmedt auf der Günne, Jörn and Vignolini, Silvia and Tiemann, Michael and et al.}, year={2020}, pages={12639–12647} }","mla":"Ivanova, Alesja, et al. “Cellulose Nanocrystal-Templated Tin Dioxide Thin Films for Gas Sensing.” <i>ACS Applied Materials &#38; Interfaces</i>, 2020, pp. 12639–47, doi:<a href=\"https://doi.org/10.1021/acsami.9b11891\">10.1021/acsami.9b11891</a>.","short":"A. Ivanova, B. Frka-Petesic, A. Paul, T. Wagner, A.N. Jumabekov, Y. Vilk, J. Weber, J. Schmedt auf der Günne, S. Vignolini, M. Tiemann, D. Fattakhova-Rohlfing, T. Bein, ACS Applied Materials &#38; Interfaces (2020) 12639–12647.","apa":"Ivanova, A., Frka-Petesic, B., Paul, A., Wagner, T., Jumabekov, A. N., Vilk, Y., Weber, J., Schmedt auf der Günne, J., Vignolini, S., Tiemann, M., Fattakhova-Rohlfing, D., &#38; Bein, T. (2020). Cellulose Nanocrystal-Templated Tin Dioxide Thin Films for Gas Sensing. <i>ACS Applied Materials &#38; Interfaces</i>, 12639–12647. <a href=\"https://doi.org/10.1021/acsami.9b11891\">https://doi.org/10.1021/acsami.9b11891</a>"},"page":"12639-12647","publication_status":"published","quality_controlled":"1","publication_identifier":{"issn":["1944-8244","1944-8252"]}},{"citation":{"ama":"Chen Z, Kuckling D, Tiemann M. Nanoporous aluminum oxide micropatterns prepared by hydrogel templating. <i>Nanotechnology</i>. 2020;31. doi:<a href=\"https://doi.org/10.1088/1361-6528/aba710\">10.1088/1361-6528/aba710</a>","ieee":"Z. Chen, D. Kuckling, and M. Tiemann, “Nanoporous aluminum oxide micropatterns prepared by hydrogel templating,” <i>Nanotechnology</i>, vol. 31, Art. no. 445601, 2020, doi: <a href=\"https://doi.org/10.1088/1361-6528/aba710\">10.1088/1361-6528/aba710</a>.","chicago":"Chen, Zimei, Dirk Kuckling, and Michael Tiemann. “Nanoporous Aluminum Oxide Micropatterns Prepared by Hydrogel Templating.” <i>Nanotechnology</i> 31 (2020). <a href=\"https://doi.org/10.1088/1361-6528/aba710\">https://doi.org/10.1088/1361-6528/aba710</a>.","mla":"Chen, Zimei, et al. “Nanoporous Aluminum Oxide Micropatterns Prepared by Hydrogel Templating.” <i>Nanotechnology</i>, vol. 31, 445601, IOP Publishing, 2020, doi:<a href=\"https://doi.org/10.1088/1361-6528/aba710\">10.1088/1361-6528/aba710</a>.","bibtex":"@article{Chen_Kuckling_Tiemann_2020, title={Nanoporous aluminum oxide micropatterns prepared by hydrogel templating}, volume={31}, DOI={<a href=\"https://doi.org/10.1088/1361-6528/aba710\">10.1088/1361-6528/aba710</a>}, number={445601}, journal={Nanotechnology}, publisher={IOP Publishing}, author={Chen, Zimei and Kuckling, Dirk and Tiemann, Michael}, year={2020} }","short":"Z. Chen, D. Kuckling, M. Tiemann, Nanotechnology 31 (2020).","apa":"Chen, Z., Kuckling, D., &#38; Tiemann, M. (2020). Nanoporous aluminum oxide micropatterns prepared by hydrogel templating. <i>Nanotechnology</i>, <i>31</i>, Article 445601. <a href=\"https://doi.org/10.1088/1361-6528/aba710\">https://doi.org/10.1088/1361-6528/aba710</a>"},"intvolume":"        31","publication_status":"published","publication_identifier":{"issn":["0957-4484","1361-6528"]},"main_file_link":[{"url":"https://iopscience.iop.org/article/10.1088/1361-6528/aba710/pdf","open_access":"1"}],"doi":"10.1088/1361-6528/aba710","date_updated":"2023-03-08T08:26:12Z","oa":"1","author":[{"first_name":"Zimei","last_name":"Chen","full_name":"Chen, Zimei"},{"last_name":"Kuckling","id":"287","full_name":"Kuckling, Dirk","first_name":"Dirk"},{"full_name":"Tiemann, Michael","id":"23547","last_name":"Tiemann","orcid":"0000-0003-1711-2722","first_name":"Michael"}],"volume":31,"status":"public","type":"journal_article","article_type":"original","article_number":"445601","_id":"23854","user_id":"23547","department":[{"_id":"311"},{"_id":"35"},{"_id":"307"},{"_id":"2"}],"year":"2020","quality_controlled":"1","title":"Nanoporous aluminum oxide micropatterns prepared by hydrogel templating","publisher":"IOP Publishing","date_created":"2021-09-07T10:23:25Z","abstract":[{"text":"Micropatterned nanoporous aluminum oxide arrays are prepared on silicon wafer substrates by using photopolymerized poly(dimethylacrylamide) hydrogels as porogenic matrices. Hydrogel micropatterns are fabricated by spreading the prepolymer mixture on the substrate, followed by UV photopolymerization through a micropatterned mask. The hydrogel is covalently bonded to the substrate surface. Al2O3 is produced by swelling the hydrogel in a saturated aluminum nitrate solution and subsequent thermal conversion/calcination. As a result, micropatterned porous Al2O3 microdots with heights in µm range and large specific surface areas up to 274 m2 g−1 are obtained. Hence, the hydrogel fulfills a dual templating function, namely micropatterning and nanoporosity generation. The impact of varying the photopolymerization time on the properties of the products is studied. Samples are characterized by light and confocal laser scanning microscopy, scanning electron microscopy, energy-dispersive x-ray spectrometry, and Kr physisorption analysis.","lang":"eng"}],"publication":"Nanotechnology","language":[{"iso":"eng"}]},{"publication_identifier":{"issn":["1434-1948","1099-0682"]},"publication_status":"published","page":"3402-3407","citation":{"short":"X. Zhang, C. Weinberger, S. Amrehn, X. Wu, M. Tiemann, T. Wagner, European Journal of Inorganic Chemistry (2020) 3402–3407.","mla":"Zhang, Xuyang, et al. “Synthesis of Metal Oxide Inverse Opals from Metal Nitrates by PMMA Colloidal Crystal Templating.” <i>European Journal of Inorganic Chemistry</i>, 2020, pp. 3402–07, doi:<a href=\"https://doi.org/10.1002/ejic.202000517\">10.1002/ejic.202000517</a>.","bibtex":"@article{Zhang_Weinberger_Amrehn_Wu_Tiemann_Wagner_2020, title={Synthesis of Metal Oxide Inverse Opals from Metal Nitrates by PMMA Colloidal Crystal Templating}, DOI={<a href=\"https://doi.org/10.1002/ejic.202000517\">10.1002/ejic.202000517</a>}, journal={European Journal of Inorganic Chemistry}, author={Zhang, Xuyang and Weinberger, Christian and Amrehn, Sabrina and Wu, Xia and Tiemann, Michael and Wagner, Thorsten}, year={2020}, pages={3402–3407} }","apa":"Zhang, X., Weinberger, C., Amrehn, S., Wu, X., Tiemann, M., &#38; Wagner, T. (2020). Synthesis of Metal Oxide Inverse Opals from Metal Nitrates by PMMA Colloidal Crystal Templating. <i>European Journal of Inorganic Chemistry</i>, 3402–3407. <a href=\"https://doi.org/10.1002/ejic.202000517\">https://doi.org/10.1002/ejic.202000517</a>","ieee":"X. Zhang, C. Weinberger, S. Amrehn, X. Wu, M. Tiemann, and T. Wagner, “Synthesis of Metal Oxide Inverse Opals from Metal Nitrates by PMMA Colloidal Crystal Templating,” <i>European Journal of Inorganic Chemistry</i>, pp. 3402–3407, 2020, doi: <a href=\"https://doi.org/10.1002/ejic.202000517\">10.1002/ejic.202000517</a>.","chicago":"Zhang, Xuyang, Christian Weinberger, Sabrina Amrehn, Xia Wu, Michael Tiemann, and Thorsten Wagner. “Synthesis of Metal Oxide Inverse Opals from Metal Nitrates by PMMA Colloidal Crystal Templating.” <i>European Journal of Inorganic Chemistry</i>, 2020, 3402–7. <a href=\"https://doi.org/10.1002/ejic.202000517\">https://doi.org/10.1002/ejic.202000517</a>.","ama":"Zhang X, Weinberger C, Amrehn S, Wu X, Tiemann M, Wagner T. Synthesis of Metal Oxide Inverse Opals from Metal Nitrates by PMMA Colloidal Crystal Templating. <i>European Journal of Inorganic Chemistry</i>. Published online 2020:3402-3407. doi:<a href=\"https://doi.org/10.1002/ejic.202000517\">10.1002/ejic.202000517</a>"},"author":[{"full_name":"Zhang, Xuyang","last_name":"Zhang","first_name":"Xuyang"},{"last_name":"Weinberger","id":"11848","full_name":"Weinberger, Christian","first_name":"Christian"},{"full_name":"Amrehn, Sabrina","last_name":"Amrehn","first_name":"Sabrina"},{"full_name":"Wu, Xia","last_name":"Wu","first_name":"Xia"},{"first_name":"Michael","last_name":"Tiemann","orcid":"0000-0003-1711-2722","id":"23547","full_name":"Tiemann, Michael"},{"first_name":"Thorsten","last_name":"Wagner","full_name":"Wagner, Thorsten"}],"oa":"1","date_updated":"2023-03-08T08:24:24Z","doi":"10.1002/ejic.202000517","main_file_link":[{"open_access":"1","url":"https://chemistry-europe.onlinelibrary.wiley.com/doi/epdf/10.1002/ejic.202000517"}],"type":"journal_article","status":"public","department":[{"_id":"35"},{"_id":"2"},{"_id":"307"}],"user_id":"23547","_id":"25898","article_type":"original","quality_controlled":"1","year":"2020","date_created":"2021-10-08T10:32:08Z","title":"Synthesis of Metal Oxide Inverse Opals from Metal Nitrates by PMMA Colloidal Crystal Templating","publication":"European Journal of Inorganic Chemistry","abstract":[{"text":"Metal oxide inverse opals are interesting for various applications. To achieve highly ordered inverse opal structures, one important issue during the colloidal crystal templating procedure is to form a stable precursor network before the template loses its structural integrity at high temperature. Using poly(methyl methacrylate), PMMA, colloidal crystal templates, it is essential to consider the physical and chemical changes of the precursors induced by the changes of PMMA during the thermal conversion. For a systematic investigation of this matter, we synthesized a variety of metal oxide inverse opals from the respective metal nitrates, including Cr2O3, Ga2O3, Fe2O3, In2O3, CuO, CeO2, and ZnO, to compare the effect of various modifications of precursors on the structural and optical properties. When the nitrate precursors have a lower thermal stability than the PMMA template, we have modified the metal nitrates by chelating or by polyacrylamide gelation to form more stable precursor networks.","lang":"eng"}],"language":[{"iso":"eng"}]},{"year":"2020","page":"605-609","citation":{"ieee":"A. Javed, T. Wagner, S. Wöhlbrandt, N. Stock, and M. Tiemann, “Proton Conduction in a Single Crystal of a Phosphonato‐Sulfonate‐Based Coordination Polymer: Mechanistic Insight,” <i>ChemPhysChem</i>, pp. 605–609, 2020, doi: <a href=\"https://doi.org/10.1002/cphc.202000102\">10.1002/cphc.202000102</a>.","chicago":"Javed, Ali, Thorsten Wagner, Stephan Wöhlbrandt, Norbert Stock, and Michael Tiemann. “Proton Conduction in a Single Crystal of a Phosphonato‐Sulfonate‐Based Coordination Polymer: Mechanistic Insight.” <i>ChemPhysChem</i>, 2020, 605–9. <a href=\"https://doi.org/10.1002/cphc.202000102\">https://doi.org/10.1002/cphc.202000102</a>.","ama":"Javed A, Wagner T, Wöhlbrandt S, Stock N, Tiemann M. Proton Conduction in a Single Crystal of a Phosphonato‐Sulfonate‐Based Coordination Polymer: Mechanistic Insight. <i>ChemPhysChem</i>. Published online 2020:605-609. doi:<a href=\"https://doi.org/10.1002/cphc.202000102\">10.1002/cphc.202000102</a>","short":"A. Javed, T. Wagner, S. Wöhlbrandt, N. Stock, M. Tiemann, ChemPhysChem (2020) 605–609.","mla":"Javed, Ali, et al. “Proton Conduction in a Single Crystal of a Phosphonato‐Sulfonate‐Based Coordination Polymer: Mechanistic Insight.” <i>ChemPhysChem</i>, 2020, pp. 605–09, doi:<a href=\"https://doi.org/10.1002/cphc.202000102\">10.1002/cphc.202000102</a>.","bibtex":"@article{Javed_Wagner_Wöhlbrandt_Stock_Tiemann_2020, title={Proton Conduction in a Single Crystal of a Phosphonato‐Sulfonate‐Based Coordination Polymer: Mechanistic Insight}, DOI={<a href=\"https://doi.org/10.1002/cphc.202000102\">10.1002/cphc.202000102</a>}, journal={ChemPhysChem}, author={Javed, Ali and Wagner, Thorsten and Wöhlbrandt, Stephan and Stock, Norbert and Tiemann, Michael}, year={2020}, pages={605–609} }","apa":"Javed, A., Wagner, T., Wöhlbrandt, S., Stock, N., &#38; Tiemann, M. (2020). Proton Conduction in a Single Crystal of a Phosphonato‐Sulfonate‐Based Coordination Polymer: Mechanistic Insight. <i>ChemPhysChem</i>, 605–609. <a href=\"https://doi.org/10.1002/cphc.202000102\">https://doi.org/10.1002/cphc.202000102</a>"},"publication_identifier":{"issn":["1439-4235","1439-7641"]},"quality_controlled":"1","publication_status":"published","title":"Proton Conduction in a Single Crystal of a Phosphonato‐Sulfonate‐Based Coordination Polymer: Mechanistic Insight","doi":"10.1002/cphc.202000102","main_file_link":[{"url":"https://chemistry-europe.onlinelibrary.wiley.com/doi/epdf/10.1002/cphc.202000102","open_access":"1"}],"date_updated":"2023-03-08T08:25:21Z","oa":"1","author":[{"first_name":"Ali","last_name":"Javed","full_name":"Javed, Ali"},{"first_name":"Thorsten","last_name":"Wagner","full_name":"Wagner, Thorsten"},{"full_name":"Wöhlbrandt, Stephan","last_name":"Wöhlbrandt","first_name":"Stephan"},{"last_name":"Stock","full_name":"Stock, Norbert","first_name":"Norbert"},{"last_name":"Tiemann","orcid":"0000-0003-1711-2722","id":"23547","full_name":"Tiemann, Michael","first_name":"Michael"}],"date_created":"2021-10-08T10:35:08Z","abstract":[{"text":"The proton conduction properties of a phosphonato-sulfonate-based coordination polymer are studied by impedance spectroscopy using a single crystal specimen. Two distinct conduction mechanisms are identified. Water-mediated conductance along the crystal surface occurs by mass transport, as evidenced by a high activation energy (0.54 eV). In addition, intrinsic conduction by proton ′hopping′ through the interior of the crystal with a low activation energy (0.31 eV) is observed. This latter conduction is anisotropic with respect to the crystal structure and seems to occur through a channel along the c axis of the orthorhombic crystal. Proton conduction is assumed to be mediated by sulfonate groups and non-coordinating water molecules that are part of the crystal structure.","lang":"eng"}],"status":"public","publication":"ChemPhysChem","type":"journal_article","article_type":"original","language":[{"iso":"eng"}],"_id":"25900","department":[{"_id":"35"},{"_id":"2"},{"_id":"307"}],"user_id":"23547"}]