---
_id: '25894'
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.
article_number: '110330'
article_type: original
author:
- first_name: Bertram
full_name: Schwind, Bertram
last_name: Schwind
- first_name: Jan-Henrik
full_name: Smått, Jan-Henrik
last_name: Smått
- first_name: Michael
full_name: Tiemann, Michael
id: '23547'
last_name: Tiemann
orcid: 0000-0003-1711-2722
- first_name: Christian
full_name: Weinberger, Christian
id: '11848'
last_name: Weinberger
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. Microporous
and Mesoporous Materials. Published online 2021. doi:10.1016/j.micromeso.2020.110330
apa: Schwind, B., Smått, J.-H., Tiemann, M., & Weinberger, C. (2021). Modeling
of gyroidal mesoporous CMK-8 and CMK-9 carbon nanostructures and their X-Ray diffraction
patterns. Microporous and Mesoporous Materials, Article 110330. https://doi.org/10.1016/j.micromeso.2020.110330
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={10.1016/j.micromeso.2020.110330},
number={110330}, journal={Microporous and Mesoporous Materials}, author={Schwind,
Bertram and Smått, Jan-Henrik and Tiemann, Michael and Weinberger, Christian},
year={2021} }'
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.” Microporous and Mesoporous Materials, 2021.
https://doi.org/10.1016/j.micromeso.2020.110330.
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,”
Microporous and Mesoporous Materials, Art. no. 110330, 2021, doi: 10.1016/j.micromeso.2020.110330.'
mla: Schwind, Bertram, et al. “Modeling of Gyroidal Mesoporous CMK-8 and CMK-9 Carbon
Nanostructures and Their X-Ray Diffraction Patterns.” Microporous and Mesoporous
Materials, 110330, 2021, doi:10.1016/j.micromeso.2020.110330.
short: B. Schwind, J.-H. Smått, M. Tiemann, C. Weinberger, Microporous and Mesoporous
Materials (2021).
date_created: 2021-10-08T10:02:31Z
date_updated: 2023-03-07T10:44:44Z
department:
- _id: '35'
- _id: '2'
- _id: '307'
doi: 10.1016/j.micromeso.2020.110330
language:
- iso: eng
publication: Microporous and Mesoporous Materials
publication_identifier:
issn:
- 1387-1811
publication_status: published
quality_controlled: '1'
status: public
title: Modeling of gyroidal mesoporous CMK-8 and CMK-9 carbon nanostructures and their
X-Ray diffraction patterns
type: journal_article
user_id: '23547'
year: '2021'
...
---
_id: '25897'
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.
article_number: '103256'
article_type: original
author:
- first_name: Teresa
full_name: de los Arcos, Teresa
last_name: de los Arcos
- first_name: Hendrik
full_name: Müller, Hendrik
last_name: Müller
- first_name: Fuzeng
full_name: Wang, Fuzeng
last_name: Wang
- first_name: Varun Raj
full_name: Damerla, Varun Raj
last_name: Damerla
- first_name: Christian
full_name: Hoppe, Christian
last_name: Hoppe
- first_name: Christian
full_name: Weinberger, Christian
id: '11848'
last_name: Weinberger
- first_name: Michael
full_name: Tiemann, Michael
id: '23547'
last_name: Tiemann
orcid: 0000-0003-1711-2722
- first_name: Guido
full_name: Grundmeier, Guido
id: '194'
last_name: Grundmeier
citation:
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. Vibrational
Spectroscopy. Published online 2021. doi:10.1016/j.vibspec.2021.103256
apa: de los Arcos, T., Müller, H., Wang, F., Damerla, V. R., Hoppe, C., Weinberger,
C., Tiemann, M., & Grundmeier, G. (2021). Review of infrared spectroscopy
techniques for the determination of internal structure in thin SiO2 films. Vibrational
Spectroscopy, Article 103256. https://doi.org/10.1016/j.vibspec.2021.103256
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={10.1016/j.vibspec.2021.103256},
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}
}'
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.” Vibrational Spectroscopy, 2021. https://doi.org/10.1016/j.vibspec.2021.103256.
ieee: 'T. de los Arcos et al., “Review of infrared spectroscopy techniques
for the determination of internal structure in thin SiO2 films,” Vibrational
Spectroscopy, Art. no. 103256, 2021, doi: 10.1016/j.vibspec.2021.103256.'
mla: de los Arcos, Teresa, et al. “Review of Infrared Spectroscopy Techniques for
the Determination of Internal Structure in Thin SiO2 Films.” Vibrational Spectroscopy,
103256, 2021, doi:10.1016/j.vibspec.2021.103256.
short: T. de los Arcos, H. Müller, F. Wang, V.R. Damerla, C. Hoppe, C. Weinberger,
M. Tiemann, G. Grundmeier, Vibrational Spectroscopy (2021).
date_created: 2021-10-08T10:09:45Z
date_updated: 2023-03-07T10:44:06Z
department:
- _id: '35'
- _id: '2'
- _id: '307'
- _id: '302'
doi: 10.1016/j.vibspec.2021.103256
language:
- iso: eng
publication: Vibrational Spectroscopy
publication_identifier:
issn:
- 0924-2031
publication_status: published
quality_controlled: '1'
status: public
title: Review of infrared spectroscopy techniques for the determination of internal
structure in thin SiO2 films
type: journal_article
user_id: '23547'
year: '2021'
...
---
_id: '25893'
abstract:
- lang: eng
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.
article_number: '2001153'
article_type: review
author:
- first_name: Michael
full_name: Tiemann, Michael
id: '23547'
last_name: Tiemann
orcid: 0000-0003-1711-2722
- first_name: Christian
full_name: Weinberger, Christian
id: '11848'
last_name: Weinberger
citation:
ama: Tiemann M, Weinberger C. Selective Modification of Hierarchical Pores and Surfaces
in Nanoporous Materials. Advanced Materials Interfaces. Published online
2021. doi:10.1002/admi.202001153
apa: Tiemann, M., & Weinberger, C. (2021). Selective Modification of Hierarchical
Pores and Surfaces in Nanoporous Materials. Advanced Materials Interfaces,
Article 2001153. https://doi.org/10.1002/admi.202001153
bibtex: '@article{Tiemann_Weinberger_2021, title={Selective Modification of Hierarchical
Pores and Surfaces in Nanoporous Materials}, DOI={10.1002/admi.202001153},
number={2001153}, journal={Advanced Materials Interfaces}, author={Tiemann, Michael
and Weinberger, Christian}, year={2021} }'
chicago: Tiemann, Michael, and Christian Weinberger. “Selective Modification of
Hierarchical Pores and Surfaces in Nanoporous Materials.” Advanced Materials
Interfaces, 2021. https://doi.org/10.1002/admi.202001153.
ieee: 'M. Tiemann and C. Weinberger, “Selective Modification of Hierarchical Pores
and Surfaces in Nanoporous Materials,” Advanced Materials Interfaces, Art.
no. 2001153, 2021, doi: 10.1002/admi.202001153.'
mla: Tiemann, Michael, and Christian Weinberger. “Selective Modification of Hierarchical
Pores and Surfaces in Nanoporous Materials.” Advanced Materials Interfaces,
2001153, 2021, doi:10.1002/admi.202001153.
short: M. Tiemann, C. Weinberger, Advanced Materials Interfaces (2021).
date_created: 2021-10-08T10:01:21Z
date_updated: 2023-03-07T10:45:40Z
department:
- _id: '35'
- _id: '2'
- _id: '307'
doi: 10.1002/admi.202001153
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://onlinelibrary.wiley.com/doi/epdf/10.1002/admi.202001153
oa: '1'
publication: Advanced Materials Interfaces
publication_identifier:
issn:
- 2196-7350
- 2196-7350
publication_status: published
quality_controlled: '1'
status: public
title: Selective Modification of Hierarchical Pores and Surfaces in Nanoporous Materials
type: journal_article
user_id: '23547'
year: '2021'
...
---
_id: '25896'
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.
article_number: '105722'
article_type: original
author:
- first_name: R.
full_name: Tischendorf, R.
last_name: Tischendorf
- first_name: M.
full_name: Simmler, M.
last_name: Simmler
- first_name: Christian
full_name: Weinberger, Christian
id: '11848'
last_name: Weinberger
- first_name: M.
full_name: Bieber, M.
last_name: Bieber
- first_name: M.
full_name: Reddemann, M.
last_name: Reddemann
- first_name: F.
full_name: Fröde, F.
last_name: Fröde
- first_name: J.
full_name: Lindner, J.
last_name: Lindner
- first_name: H.
full_name: Pitsch, H.
last_name: Pitsch
- first_name: R.
full_name: Kneer, R.
last_name: Kneer
- first_name: Michael
full_name: Tiemann, Michael
id: '23547'
last_name: Tiemann
orcid: 0000-0003-1711-2722
- first_name: H.
full_name: Nirschl, H.
last_name: Nirschl
- first_name: H.-J.
full_name: Schmid, H.-J.
last_name: Schmid
citation:
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. Journal of Aerosol Science. Published online 2021.
doi:10.1016/j.jaerosci.2020.105722
apa: Tischendorf, R., Simmler, M., Weinberger, C., Bieber, M., Reddemann, M., Fröde,
F., Lindner, J., Pitsch, H., Kneer, R., Tiemann, M., Nirschl, H., & Schmid,
H.-J. (2021). Examination of the evolution of iron oxide nanoparticles in flame
spray pyrolysis by tailored in situ particle sampling techniques. Journal of
Aerosol Science, Article 105722. https://doi.org/10.1016/j.jaerosci.2020.105722
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={10.1016/j.jaerosci.2020.105722},
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} }'
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.” Journal
of Aerosol Science, 2021. https://doi.org/10.1016/j.jaerosci.2020.105722.
ieee: 'R. Tischendorf et al., “Examination of the evolution of iron oxide
nanoparticles in flame spray pyrolysis by tailored in situ particle sampling techniques,”
Journal of Aerosol Science, Art. no. 105722, 2021, doi: 10.1016/j.jaerosci.2020.105722.'
mla: Tischendorf, R., et al. “Examination of the Evolution of Iron Oxide Nanoparticles
in Flame Spray Pyrolysis by Tailored in Situ Particle Sampling Techniques.” Journal
of Aerosol Science, 105722, 2021, doi:10.1016/j.jaerosci.2020.105722.
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).
date_created: 2021-10-08T10:07:18Z
date_updated: 2023-03-08T08:07:30Z
department:
- _id: '9'
- _id: '35'
- _id: '2'
- _id: '307'
doi: 10.1016/j.jaerosci.2020.105722
language:
- iso: eng
publication: Journal of Aerosol Science
publication_identifier:
issn:
- 0021-8502
publication_status: published
quality_controlled: '1'
status: public
title: Examination of the evolution of iron oxide nanoparticles in flame spray pyrolysis
by tailored in situ particle sampling techniques
type: journal_article
user_id: '23547'
year: '2021'
...
---
_id: '22635'
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.
article_type: original
author:
- first_name: Jaime Andres
full_name: Garcia Diosa, Jaime Andres
last_name: Garcia Diosa
- first_name: Alejandro
full_name: Gonzalez Orive, Alejandro
last_name: Gonzalez Orive
- first_name: Christian
full_name: Weinberger, Christian
id: '11848'
last_name: Weinberger
- first_name: Sabrina
full_name: Schwiderek, Sabrina
last_name: Schwiderek
- first_name: Steffen
full_name: Knust, Steffen
last_name: Knust
- first_name: Michael
full_name: Tiemann, Michael
id: '23547'
last_name: Tiemann
orcid: 0000-0003-1711-2722
- first_name: Guido
full_name: Grundmeier, Guido
id: '194'
last_name: Grundmeier
- first_name: Adrian
full_name: Keller, Adrian
id: '48864'
last_name: Keller
orcid: 0000-0001-7139-3110
- first_name: Ruben Jesus
full_name: Camargo Amado, Ruben Jesus
last_name: Camargo Amado
citation:
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. Journal of Biomedical Materials Research Part B: Applied Biomaterials.
2021;109:2142–2153. doi:10.1002/jbm.b.34862'
apa: 'Garcia Diosa, J. A., Gonzalez Orive, A., Weinberger, C., Schwiderek, S., Knust,
S., Tiemann, M., Grundmeier, G., Keller, A., & Camargo Amado, R. J. (2021).
TiO2 nanoparticle coatings on glass surfaces for the selective trapping of leukemia
cells from peripheral blood. Journal of Biomedical Materials Research Part
B: Applied Biomaterials, 109, 2142–2153. https://doi.org/10.1002/jbm.b.34862'
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={10.1002/jbm.b.34862},
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} }'
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.” Journal of
Biomedical Materials Research Part B: Applied Biomaterials 109 (2021): 2142–2153.
https://doi.org/10.1002/jbm.b.34862.'
ieee: 'J. A. Garcia Diosa et al., “TiO2 nanoparticle coatings on glass surfaces
for the selective trapping of leukemia cells from peripheral blood,” Journal
of Biomedical Materials Research Part B: Applied Biomaterials, vol. 109, pp.
2142–2153, 2021, doi: 10.1002/jbm.b.34862.'
mla: 'Garcia Diosa, Jaime Andres, et al. “TiO2 Nanoparticle Coatings on Glass Surfaces
for the Selective Trapping of Leukemia Cells from Peripheral Blood.” Journal
of Biomedical Materials Research Part B: Applied Biomaterials, vol. 109, 2021,
pp. 2142–2153, doi:10.1002/jbm.b.34862.'
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.'
date_created: 2021-07-08T11:34:21Z
date_updated: 2023-03-08T08:10:25Z
department:
- _id: '302'
- _id: '307'
- _id: '35'
- _id: '2'
doi: 10.1002/jbm.b.34862
intvolume: ' 109'
language:
- iso: eng
page: 2142–2153
publication: 'Journal of Biomedical Materials Research Part B: Applied Biomaterials'
publication_identifier:
issn:
- 1552-4973
- 1552-4981
publication_status: published
quality_controlled: '1'
status: public
title: TiO2 nanoparticle coatings on glass surfaces for the selective trapping of
leukemia cells from peripheral blood
type: journal_article
user_id: '23547'
volume: 109
year: '2021'
...
---
_id: '25892'
abstract:
- lang: eng
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.
article_type: original
author:
- first_name: Felix
full_name: Steinke, Felix
last_name: Steinke
- first_name: Ali
full_name: Javed, Ali
last_name: Javed
- first_name: Stephan
full_name: Wöhlbrandt, Stephan
last_name: Wöhlbrandt
- first_name: Michael
full_name: Tiemann, Michael
id: '23547'
last_name: Tiemann
orcid: 0000-0003-1711-2722
- first_name: Norbert
full_name: Stock, Norbert
last_name: Stock
citation:
ama: Steinke F, Javed A, Wöhlbrandt S, Tiemann M, Stock N. New isoreticular phosphonate
MOFs based on a tetratopic linker. Dalton Transactions. Published online
2021:13572-13579. doi:10.1039/d1dt02610k
apa: Steinke, F., Javed, A., Wöhlbrandt, S., Tiemann, M., & Stock, N. (2021).
New isoreticular phosphonate MOFs based on a tetratopic linker. Dalton Transactions,
13572–13579. https://doi.org/10.1039/d1dt02610k
bibtex: '@article{Steinke_Javed_Wöhlbrandt_Tiemann_Stock_2021, title={New isoreticular
phosphonate MOFs based on a tetratopic linker}, DOI={10.1039/d1dt02610k},
journal={Dalton Transactions}, author={Steinke, Felix and Javed, Ali and Wöhlbrandt,
Stephan and Tiemann, Michael and Stock, Norbert}, year={2021}, pages={13572–13579}
}'
chicago: Steinke, Felix, Ali Javed, Stephan Wöhlbrandt, Michael Tiemann, and Norbert
Stock. “New Isoreticular Phosphonate MOFs Based on a Tetratopic Linker.” Dalton
Transactions, 2021, 13572–79. https://doi.org/10.1039/d1dt02610k.
ieee: 'F. Steinke, A. Javed, S. Wöhlbrandt, M. Tiemann, and N. Stock, “New isoreticular
phosphonate MOFs based on a tetratopic linker,” Dalton Transactions, pp.
13572–13579, 2021, doi: 10.1039/d1dt02610k.'
mla: Steinke, Felix, et al. “New Isoreticular Phosphonate MOFs Based on a Tetratopic
Linker.” Dalton Transactions, 2021, pp. 13572–79, doi:10.1039/d1dt02610k.
short: F. Steinke, A. Javed, S. Wöhlbrandt, M. Tiemann, N. Stock, Dalton Transactions
(2021) 13572–13579.
date_created: 2021-10-08T09:57:34Z
date_updated: 2023-03-08T08:08:22Z
department:
- _id: '2'
- _id: '307'
doi: 10.1039/d1dt02610k
language:
- iso: eng
page: 13572-13579
publication: Dalton Transactions
publication_identifier:
issn:
- 1477-9226
- 1477-9234
publication_status: published
quality_controlled: '1'
status: public
title: New isoreticular phosphonate MOFs based on a tetratopic linker
type: journal_article
user_id: '23547'
year: '2021'
...
---
_id: '25901'
abstract:
- lang: eng
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.
article_number: '1210'
article_type: original
author:
- first_name: Martin
full_name: Wortmann, Martin
last_name: Wortmann
- first_name: Natalie
full_name: Frese, Natalie
last_name: Frese
- first_name: Al
full_name: Mamun, Al
last_name: Mamun
- first_name: Marah
full_name: Trabelsi, Marah
last_name: Trabelsi
- first_name: Waldemar
full_name: Keil, Waldemar
last_name: Keil
- first_name: Björn
full_name: Büker, Björn
last_name: Büker
- first_name: Ali
full_name: Javed, Ali
last_name: Javed
- first_name: Michael
full_name: Tiemann, Michael
id: '23547'
last_name: Tiemann
orcid: 0000-0003-1711-2722
- first_name: Elmar
full_name: Moritzer, Elmar
id: '20531'
last_name: Moritzer
- first_name: Andrea
full_name: Ehrmann, Andrea
last_name: Ehrmann
- first_name: Andreas
full_name: Hütten, Andreas
last_name: Hütten
- first_name: Claudia
full_name: Schmidt, Claudia
id: '466'
last_name: Schmidt
orcid: 0000-0003-3179-9997
- first_name: Armin
full_name: Gölzhäuser, Armin
last_name: Gölzhäuser
- first_name: Bruno
full_name: Hüsgen, Bruno
last_name: Hüsgen
- first_name: Lilia
full_name: Sabantina, Lilia
last_name: Sabantina
citation:
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. Nanomaterials. Published online
2020. doi:10.3390/nano10061210
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., & Sabantina, L. (2020). Chemical and Morphological Transition
of Poly(acrylonitrile)/Poly(vinylidene Fluoride) Blend Nanofibers during Oxidative
Stabilization and Incipient Carbonization. Nanomaterials, Article 1210.
https://doi.org/10.3390/nano10061210
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={10.3390/nano10061210},
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} }'
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.”
Nanomaterials, 2020. https://doi.org/10.3390/nano10061210.
ieee: 'M. Wortmann et al., “Chemical and Morphological Transition of Poly(acrylonitrile)/Poly(vinylidene
Fluoride) Blend Nanofibers during Oxidative Stabilization and Incipient Carbonization,”
Nanomaterials, Art. no. 1210, 2020, doi: 10.3390/nano10061210.'
mla: Wortmann, Martin, et al. “Chemical and Morphological Transition of Poly(Acrylonitrile)/Poly(Vinylidene
Fluoride) Blend Nanofibers during Oxidative Stabilization and Incipient Carbonization.”
Nanomaterials, 1210, 2020, doi:10.3390/nano10061210.
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).
date_created: 2021-10-08T10:36:26Z
date_updated: 2023-03-08T08:18:03Z
department:
- _id: '35'
- _id: '2'
- _id: '307'
- _id: '315'
- _id: '232'
doi: 10.3390/nano10061210
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://www.mdpi.com/2079-4991/10/6/1210/pdf?version=1592726383
oa: '1'
publication: Nanomaterials
publication_identifier:
issn:
- 2079-4991
publication_status: published
quality_controlled: '1'
status: public
title: Chemical and Morphological Transition of Poly(acrylonitrile)/Poly(vinylidene
Fluoride) Blend Nanofibers during Oxidative Stabilization and Incipient Carbonization
type: journal_article
user_id: '23547'
year: '2020'
...
---
_id: '25899'
abstract:
- lang: eng
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.
article_number: '1263'
article_type: original
author:
- first_name: Ali
full_name: Javed, Ali
last_name: Javed
- first_name: Ina
full_name: Strauss, Ina
last_name: Strauss
- first_name: Hana
full_name: Bunzen, Hana
last_name: Bunzen
- first_name: Jürgen
full_name: Caro, Jürgen
last_name: Caro
- first_name: Michael
full_name: Tiemann, Michael
id: '23547'
last_name: Tiemann
orcid: 0000-0003-1711-2722
citation:
ama: Javed A, Strauss I, Bunzen H, Caro J, Tiemann M. Humidity-Mediated Anisotropic
Proton Conductivity through the 1D Channels of Co-MOF-74. Nanomaterials.
Published online 2020. doi:10.3390/nano10071263
apa: Javed, A., Strauss, I., Bunzen, H., Caro, J., & Tiemann, M. (2020). Humidity-Mediated
Anisotropic Proton Conductivity through the 1D Channels of Co-MOF-74. Nanomaterials,
Article 1263. https://doi.org/10.3390/nano10071263
bibtex: '@article{Javed_Strauss_Bunzen_Caro_Tiemann_2020, title={Humidity-Mediated
Anisotropic Proton Conductivity through the 1D Channels of Co-MOF-74}, DOI={10.3390/nano10071263}, number={1263},
journal={Nanomaterials}, author={Javed, Ali and Strauss, Ina and Bunzen, Hana
and Caro, Jürgen and Tiemann, Michael}, year={2020} }'
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.” Nanomaterials, 2020. https://doi.org/10.3390/nano10071263.
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,” Nanomaterials,
Art. no. 1263, 2020, doi: 10.3390/nano10071263.'
mla: Javed, Ali, et al. “Humidity-Mediated Anisotropic Proton Conductivity through
the 1D Channels of Co-MOF-74.” Nanomaterials, 1263, 2020, doi:10.3390/nano10071263.
short: A. Javed, I. Strauss, H. Bunzen, J. Caro, M. Tiemann, Nanomaterials (2020).
date_created: 2021-10-08T10:33:26Z
date_updated: 2023-03-08T08:22:31Z
department:
- _id: '35'
- _id: '2'
- _id: '307'
doi: 10.3390/nano10071263
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://www.mdpi.com/2079-4991/10/7/1263/pdf?version=1594009427
oa: '1'
publication: Nanomaterials
publication_identifier:
issn:
- 2079-4991
publication_status: published
quality_controlled: '1'
status: public
title: Humidity-Mediated Anisotropic Proton Conductivity through the 1D Channels of
Co-MOF-74
type: journal_article
user_id: '23547'
year: '2020'
...
---
_id: '25903'
abstract:
- lang: eng
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.
article_type: original
author:
- first_name: Alesja
full_name: Ivanova, Alesja
last_name: Ivanova
- first_name: Bruno
full_name: Frka-Petesic, Bruno
last_name: Frka-Petesic
- first_name: Andrej
full_name: Paul, Andrej
last_name: Paul
- first_name: Thorsten
full_name: Wagner, Thorsten
last_name: Wagner
- first_name: Askhat N.
full_name: Jumabekov, Askhat N.
last_name: Jumabekov
- first_name: Yury
full_name: Vilk, Yury
last_name: Vilk
- first_name: Johannes
full_name: Weber, Johannes
last_name: Weber
- first_name: Jörn
full_name: Schmedt auf der Günne, Jörn
last_name: Schmedt auf der Günne
- first_name: Silvia
full_name: Vignolini, Silvia
last_name: Vignolini
- first_name: Michael
full_name: Tiemann, Michael
id: '23547'
last_name: Tiemann
orcid: 0000-0003-1711-2722
- first_name: Dina
full_name: Fattakhova-Rohlfing, Dina
last_name: Fattakhova-Rohlfing
- first_name: Thomas
full_name: Bein, Thomas
last_name: Bein
citation:
ama: Ivanova A, Frka-Petesic B, Paul A, et al. Cellulose Nanocrystal-Templated Tin
Dioxide Thin Films for Gas Sensing. ACS Applied Materials & Interfaces.
Published online 2020:12639-12647. doi:10.1021/acsami.9b11891
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., & Bein, T. (2020). Cellulose Nanocrystal-Templated Tin Dioxide Thin Films
for Gas Sensing. ACS Applied Materials & Interfaces, 12639–12647. https://doi.org/10.1021/acsami.9b11891
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={10.1021/acsami.9b11891},
journal={ACS Applied Materials & 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} }'
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.” ACS Applied Materials & Interfaces,
2020, 12639–47. https://doi.org/10.1021/acsami.9b11891.
ieee: 'A. Ivanova et al., “Cellulose Nanocrystal-Templated Tin Dioxide Thin
Films for Gas Sensing,” ACS Applied Materials & Interfaces, pp. 12639–12647,
2020, doi: 10.1021/acsami.9b11891.'
mla: Ivanova, Alesja, et al. “Cellulose Nanocrystal-Templated Tin Dioxide Thin Films
for Gas Sensing.” ACS Applied Materials & Interfaces, 2020, pp. 12639–47,
doi:10.1021/acsami.9b11891.
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 & Interfaces (2020) 12639–12647.
date_created: 2021-10-08T10:39:27Z
date_updated: 2023-03-08T08:23:16Z
department:
- _id: '35'
- _id: '2'
- _id: '307'
doi: 10.1021/acsami.9b11891
language:
- iso: eng
page: 12639-12647
publication: ACS Applied Materials & Interfaces
publication_identifier:
issn:
- 1944-8244
- 1944-8252
publication_status: published
quality_controlled: '1'
status: public
title: Cellulose Nanocrystal-Templated Tin Dioxide Thin Films for Gas Sensing
type: journal_article
user_id: '23547'
year: '2020'
...
---
_id: '23854'
abstract:
- lang: eng
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.
article_number: '445601'
article_type: original
author:
- first_name: Zimei
full_name: Chen, Zimei
last_name: Chen
- first_name: Dirk
full_name: Kuckling, Dirk
id: '287'
last_name: Kuckling
- first_name: Michael
full_name: Tiemann, Michael
id: '23547'
last_name: Tiemann
orcid: 0000-0003-1711-2722
citation:
ama: Chen Z, Kuckling D, Tiemann M. Nanoporous aluminum oxide micropatterns prepared
by hydrogel templating. Nanotechnology. 2020;31. doi:10.1088/1361-6528/aba710
apa: Chen, Z., Kuckling, D., & Tiemann, M. (2020). Nanoporous aluminum oxide
micropatterns prepared by hydrogel templating. Nanotechnology, 31,
Article 445601. https://doi.org/10.1088/1361-6528/aba710
bibtex: '@article{Chen_Kuckling_Tiemann_2020, title={Nanoporous aluminum oxide micropatterns
prepared by hydrogel templating}, volume={31}, DOI={10.1088/1361-6528/aba710},
number={445601}, journal={Nanotechnology}, publisher={IOP Publishing}, author={Chen,
Zimei and Kuckling, Dirk and Tiemann, Michael}, year={2020} }'
chicago: Chen, Zimei, Dirk Kuckling, and Michael Tiemann. “Nanoporous Aluminum Oxide
Micropatterns Prepared by Hydrogel Templating.” Nanotechnology 31 (2020).
https://doi.org/10.1088/1361-6528/aba710.
ieee: 'Z. Chen, D. Kuckling, and M. Tiemann, “Nanoporous aluminum oxide micropatterns
prepared by hydrogel templating,” Nanotechnology, vol. 31, Art. no. 445601,
2020, doi: 10.1088/1361-6528/aba710.'
mla: Chen, Zimei, et al. “Nanoporous Aluminum Oxide Micropatterns Prepared by Hydrogel
Templating.” Nanotechnology, vol. 31, 445601, IOP Publishing, 2020, doi:10.1088/1361-6528/aba710.
short: Z. Chen, D. Kuckling, M. Tiemann, Nanotechnology 31 (2020).
date_created: 2021-09-07T10:23:25Z
date_updated: 2023-03-08T08:26:12Z
department:
- _id: '311'
- _id: '35'
- _id: '307'
- _id: '2'
doi: 10.1088/1361-6528/aba710
intvolume: ' 31'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://iopscience.iop.org/article/10.1088/1361-6528/aba710/pdf
oa: '1'
publication: Nanotechnology
publication_identifier:
issn:
- 0957-4484
- 1361-6528
publication_status: published
publisher: IOP Publishing
quality_controlled: '1'
status: public
title: Nanoporous aluminum oxide micropatterns prepared by hydrogel templating
type: journal_article
user_id: '23547'
volume: 31
year: '2020'
...
---
_id: '25898'
abstract:
- lang: eng
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.
article_type: original
author:
- first_name: Xuyang
full_name: Zhang, Xuyang
last_name: Zhang
- first_name: Christian
full_name: Weinberger, Christian
id: '11848'
last_name: Weinberger
- first_name: Sabrina
full_name: Amrehn, Sabrina
last_name: Amrehn
- first_name: Xia
full_name: Wu, Xia
last_name: Wu
- first_name: Michael
full_name: Tiemann, Michael
id: '23547'
last_name: Tiemann
orcid: 0000-0003-1711-2722
- first_name: Thorsten
full_name: Wagner, Thorsten
last_name: Wagner
citation:
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.
European Journal of Inorganic Chemistry. Published online 2020:3402-3407.
doi:10.1002/ejic.202000517
apa: Zhang, X., Weinberger, C., Amrehn, S., Wu, X., Tiemann, M., & Wagner, T.
(2020). Synthesis of Metal Oxide Inverse Opals from Metal Nitrates by PMMA Colloidal
Crystal Templating. European Journal of Inorganic Chemistry, 3402–3407.
https://doi.org/10.1002/ejic.202000517
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={10.1002/ejic.202000517},
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} }'
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.” European Journal of Inorganic Chemistry,
2020, 3402–7. https://doi.org/10.1002/ejic.202000517.
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,”
European Journal of Inorganic Chemistry, pp. 3402–3407, 2020, doi: 10.1002/ejic.202000517.'
mla: Zhang, Xuyang, et al. “Synthesis of Metal Oxide Inverse Opals from Metal Nitrates
by PMMA Colloidal Crystal Templating.” European Journal of Inorganic Chemistry,
2020, pp. 3402–07, doi:10.1002/ejic.202000517.
short: X. Zhang, C. Weinberger, S. Amrehn, X. Wu, M. Tiemann, T. Wagner, European
Journal of Inorganic Chemistry (2020) 3402–3407.
date_created: 2021-10-08T10:32:08Z
date_updated: 2023-03-08T08:24:24Z
department:
- _id: '35'
- _id: '2'
- _id: '307'
doi: 10.1002/ejic.202000517
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://chemistry-europe.onlinelibrary.wiley.com/doi/epdf/10.1002/ejic.202000517
oa: '1'
page: 3402-3407
publication: European Journal of Inorganic Chemistry
publication_identifier:
issn:
- 1434-1948
- 1099-0682
publication_status: published
quality_controlled: '1'
status: public
title: Synthesis of Metal Oxide Inverse Opals from Metal Nitrates by PMMA Colloidal
Crystal Templating
type: journal_article
user_id: '23547'
year: '2020'
...
---
_id: '25900'
abstract:
- lang: eng
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.
article_type: original
author:
- first_name: Ali
full_name: Javed, Ali
last_name: Javed
- first_name: Thorsten
full_name: Wagner, Thorsten
last_name: Wagner
- first_name: Stephan
full_name: Wöhlbrandt, Stephan
last_name: Wöhlbrandt
- first_name: Norbert
full_name: Stock, Norbert
last_name: Stock
- first_name: Michael
full_name: Tiemann, Michael
id: '23547'
last_name: Tiemann
orcid: 0000-0003-1711-2722
citation:
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. ChemPhysChem. Published online 2020:605-609. doi:10.1002/cphc.202000102'
apa: 'Javed, A., Wagner, T., Wöhlbrandt, S., Stock, N., & Tiemann, M. (2020).
Proton Conduction in a Single Crystal of a Phosphonato‐Sulfonate‐Based Coordination
Polymer: Mechanistic Insight. ChemPhysChem, 605–609. https://doi.org/10.1002/cphc.202000102'
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={10.1002/cphc.202000102},
journal={ChemPhysChem}, author={Javed, Ali and Wagner, Thorsten and Wöhlbrandt,
Stephan and Stock, Norbert and Tiemann, Michael}, year={2020}, pages={605–609}
}'
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.” ChemPhysChem, 2020, 605–9.
https://doi.org/10.1002/cphc.202000102.'
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,” ChemPhysChem, pp. 605–609, 2020, doi: 10.1002/cphc.202000102.'
mla: 'Javed, Ali, et al. “Proton Conduction in a Single Crystal of a Phosphonato‐Sulfonate‐Based
Coordination Polymer: Mechanistic Insight.” ChemPhysChem, 2020, pp. 605–09,
doi:10.1002/cphc.202000102.'
short: A. Javed, T. Wagner, S. Wöhlbrandt, N. Stock, M. Tiemann, ChemPhysChem (2020)
605–609.
date_created: 2021-10-08T10:35:08Z
date_updated: 2023-03-08T08:25:21Z
department:
- _id: '35'
- _id: '2'
- _id: '307'
doi: 10.1002/cphc.202000102
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://chemistry-europe.onlinelibrary.wiley.com/doi/epdf/10.1002/cphc.202000102
oa: '1'
page: 605-609
publication: ChemPhysChem
publication_identifier:
issn:
- 1439-4235
- 1439-7641
publication_status: published
quality_controlled: '1'
status: public
title: 'Proton Conduction in a Single Crystal of a Phosphonato‐Sulfonate‐Based Coordination
Polymer: Mechanistic Insight'
type: journal_article
user_id: '23547'
year: '2020'
...
---
_id: '25902'
abstract:
- lang: eng
text: This Special Issue on “Functional Nanoporous Materials” in the MDPI journal
nanomaterials features seven original papers ...
article_number: '699'
article_type: original
author:
- first_name: Christian
full_name: Weinberger, Christian
id: '11848'
last_name: Weinberger
- first_name: Michael
full_name: Tiemann, Michael
id: '23547'
last_name: Tiemann
orcid: 0000-0003-1711-2722
citation:
ama: Weinberger C, Tiemann M. Functional Nanoporous Materials. Nanomaterials.
Published online 2020. doi:10.3390/nano10040699
apa: Weinberger, C., & Tiemann, M. (2020). Functional Nanoporous Materials.
Nanomaterials, Article 699. https://doi.org/10.3390/nano10040699
bibtex: '@article{Weinberger_Tiemann_2020, title={Functional Nanoporous Materials},
DOI={10.3390/nano10040699},
number={699}, journal={Nanomaterials}, author={Weinberger, Christian and Tiemann,
Michael}, year={2020} }'
chicago: Weinberger, Christian, and Michael Tiemann. “Functional Nanoporous Materials.”
Nanomaterials, 2020. https://doi.org/10.3390/nano10040699.
ieee: 'C. Weinberger and M. Tiemann, “Functional Nanoporous Materials,” Nanomaterials,
Art. no. 699, 2020, doi: 10.3390/nano10040699.'
mla: Weinberger, Christian, and Michael Tiemann. “Functional Nanoporous Materials.”
Nanomaterials, 699, 2020, doi:10.3390/nano10040699.
short: C. Weinberger, M. Tiemann, Nanomaterials (2020).
date_created: 2021-10-08T10:37:54Z
date_updated: 2023-03-08T08:27:09Z
department:
- _id: '2'
- _id: '307'
- _id: '35'
doi: 10.3390/nano10040699
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://www.mdpi.com/2079-4991/10/4/699/pdf?version=1586249724
oa: '1'
publication: Nanomaterials
publication_identifier:
issn:
- 2079-4991
publication_status: published
status: public
title: Functional Nanoporous Materials
type: journal_article
user_id: '23547'
year: '2020'
...
---
_id: '42892'
abstract:
- lang: eng
text: This paper presents the results of static short-term and long-term tensile
tests for beta-nucleated joined polypropylene samples by the hot plate welding
process. In the present study different dimensionless joining displacements are
accounted for. The results show that high short-term tensile strength does not
directly transfer to high long-term tensile strength. The morphology of the weld
seam in the joined samples is examined by means of transmitted and reflected light
microscopy. For the dimensionless joining displacements of 0.75 and 0.95, stretched
spherulites are obtained. X-Ray diffraction can be used as a tool for qualitative
and quantitative analysis and eventually for differentiation of samples of various
joining displacements.
author:
- first_name: Andrea
full_name: Wübbeke, Andrea
id: '12504'
last_name: Wübbeke
- first_name: Volker
full_name: Schöppner, Volker
last_name: Schöppner
- first_name: André
full_name: Paul, André
last_name: Paul
- first_name: Michael
full_name: Tiemann, Michael
id: '23547'
last_name: Tiemann
orcid: 0000-0003-1711-2722
- first_name: Laura
full_name: Austermeier, Laura
last_name: Austermeier
- first_name: Marcus
full_name: Fitze, Marcus
last_name: Fitze
- first_name: Mingie
full_name: Chen, Mingie
last_name: Chen
- first_name: Fabian
full_name: Jakob, Fabian
last_name: Jakob
- first_name: Hans-Peter
full_name: Heim, Hans-Peter
last_name: Heim
- first_name: Tao
full_name: Wu, Tao
last_name: Wu
- first_name: Thomas
full_name: Niendorf, Thomas
last_name: Niendorf
- first_name: Marie-Luise
full_name: Röhricht, Marie-Luise
last_name: Röhricht
- first_name: Michael
full_name: Schmidt, Michael
last_name: Schmidt
citation:
ama: 'Wübbeke A, Schöppner V, Paul A, et al. Long- and Short-Term Tensile Strength
and Morphology of Joined Beta-Nucleated Polypropylene Parts. In: SPE ANTEC
2020: The Virtual Edition 5 . ; 2020.'
apa: 'Wübbeke, A., Schöppner, V., Paul, A., Tiemann, M., Austermeier, L., Fitze,
M., Chen, M., Jakob, F., Heim, H.-P., Wu, T., Niendorf, T., Röhricht, M.-L., &
Schmidt, M. (2020). Long- and Short-Term Tensile Strength and Morphology of Joined
Beta-Nucleated Polypropylene Parts. SPE ANTEC 2020: The Virtual Edition 5 .'
bibtex: '@inproceedings{Wübbeke_Schöppner_Paul_Tiemann_Austermeier_Fitze_Chen_Jakob_Heim_Wu_et
al._2020, title={Long- and Short-Term Tensile Strength and Morphology of Joined
Beta-Nucleated Polypropylene Parts}, booktitle={SPE ANTEC 2020: The Virtual Edition
5 }, author={Wübbeke, Andrea and Schöppner, Volker and Paul, André and Tiemann,
Michael and Austermeier, Laura and Fitze, Marcus and Chen, Mingie and Jakob, Fabian
and Heim, Hans-Peter and Wu, Tao and et al.}, year={2020} }'
chicago: 'Wübbeke, Andrea, Volker Schöppner, André Paul, Michael Tiemann, Laura
Austermeier, Marcus Fitze, Mingie Chen, et al. “Long- and Short-Term Tensile Strength
and Morphology of Joined Beta-Nucleated Polypropylene Parts.” In SPE ANTEC
2020: The Virtual Edition 5 , 2020.'
ieee: A. Wübbeke et al., “Long- and Short-Term Tensile Strength and Morphology
of Joined Beta-Nucleated Polypropylene Parts,” 2020.
mla: 'Wübbeke, Andrea, et al. “Long- and Short-Term Tensile Strength and Morphology
of Joined Beta-Nucleated Polypropylene Parts.” SPE ANTEC 2020: The Virtual
Edition 5 , 2020.'
short: 'A. Wübbeke, V. Schöppner, A. Paul, M. Tiemann, L. Austermeier, M. Fitze,
M. Chen, F. Jakob, H.-P. Heim, T. Wu, T. Niendorf, M.-L. Röhricht, M. Schmidt,
in: SPE ANTEC 2020: The Virtual Edition 5 , 2020.'
date_created: 2023-03-09T12:20:23Z
date_updated: 2023-05-05T10:03:33Z
department:
- _id: '35'
- _id: '2'
- _id: '307'
- _id: '9'
- _id: '367'
- _id: '321'
language:
- iso: eng
publication: 'SPE ANTEC 2020: The Virtual Edition 5 '
status: public
title: Long- and Short-Term Tensile Strength and Morphology of Joined Beta-Nucleated
Polypropylene Parts
type: conference
user_id: '14931'
year: '2020'
...
---
_id: '24236'
abstract:
- lang: eng
text: In diesem Artikel werden das Scherzugverhalten und der morphologische Zustand
von konturgeschweißtem Polypropylen (PP) mit einem Massenanteil von 0,2% Ruß untersucht.
Dabei zeigen die Ergebnisse ...
article_type: original
author:
- first_name: Volker
full_name: Schöppner, Volker
id: '20530'
last_name: Schöppner
- first_name: Andrea
full_name: Wübbeke, Andrea
id: '12504'
last_name: Wübbeke
- first_name: 'Fabian '
full_name: 'Schriegel, Fabian '
last_name: Schriegel
- first_name: 'Andrej '
full_name: 'Paul, Andrej '
last_name: Paul
- first_name: Michael
full_name: Tiemann, Michael
id: '23547'
last_name: Tiemann
orcid: 0000-0003-1711-2722
- first_name: 'Bastian '
full_name: 'Geißler, Bastian '
last_name: Geißler
- first_name: 'Michael '
full_name: 'Schmidt, Michael '
last_name: Schmidt
- first_name: 'Arnaud '
full_name: 'Magnier, Arnaud '
last_name: Magnier
- first_name: 'Thomas '
full_name: 'Niendorf, Thomas '
last_name: Niendorf
citation:
ama: Schöppner V, Wübbeke A, Schriegel F, et al. Selected Aspects for the Assessment
of Laser Transmission Welding. Joining Plastics. Published online 2020:30-35.
apa: Schöppner, V., Wübbeke, A., Schriegel, F., Paul, A., Tiemann, M., Geißler,
B., Schmidt, M., Magnier, A., & Niendorf, T. (2020). Selected Aspects for
the Assessment of Laser Transmission Welding. Joining Plastics, 30–35.
bibtex: '@article{Schöppner_Wübbeke_Schriegel_Paul_Tiemann_Geißler_Schmidt_Magnier_Niendorf_2020,
title={Selected Aspects for the Assessment of Laser Transmission Welding}, journal={Joining
Plastics}, author={Schöppner, Volker and Wübbeke, Andrea and Schriegel, Fabian and
Paul, Andrej and Tiemann, Michael and Geißler, Bastian and Schmidt, Michael and
Magnier, Arnaud and Niendorf, Thomas }, year={2020}, pages={30–35} }'
chicago: Schöppner, Volker, Andrea Wübbeke, Fabian Schriegel, Andrej Paul, Michael
Tiemann, Bastian Geißler, Michael Schmidt, Arnaud Magnier, and Thomas Niendorf.
“Selected Aspects for the Assessment of Laser Transmission Welding.” Joining
Plastics, 2020, 30–35.
ieee: V. Schöppner et al., “Selected Aspects for the Assessment of Laser
Transmission Welding,” Joining Plastics, pp. 30–35, 2020.
mla: Schöppner, Volker, et al. “Selected Aspects for the Assessment of Laser Transmission
Welding.” Joining Plastics, 2020, pp. 30–35.
short: V. Schöppner, A. Wübbeke, F. Schriegel, A. Paul, M. Tiemann, B. Geißler,
M. Schmidt, A. Magnier, T. Niendorf, Joining Plastics (2020) 30–35.
date_created: 2021-09-13T08:43:53Z
date_updated: 2023-05-05T10:03:45Z
department:
- _id: '9'
- _id: '367'
- _id: '321'
- _id: '35'
- _id: '307'
- _id: '2'
language:
- iso: eng
page: 30-35
publication: Joining Plastics
quality_controlled: '1'
status: public
title: Selected Aspects for the Assessment of Laser Transmission Welding
type: journal_article
user_id: '14931'
year: '2020'
...
---
_id: '24100'
abstract:
- lang: eng
text: Zinc oxide (ZnO) hollow spheres with defined morphology and micro-/nanostructure
are prepared by a hydrothermal synthesis approach. The materials possess fine-leaved
structures at their particle surface (nanowall hollow micro spheres). Morphology
control is achieved by citric acid used as an additive in variable relative quantities
during the synthesis. The structure formation is studied by various time-dependent
ex situ methods, such as scanning electron microscopy, x-ray diffraction, and
Raman spectroscopy. The fine-leaved surface structure is characterized by high-resolution
transmission electron microscopy techniques (HRTEM, STEM), using a high-angle
annular dark field detector, as well as by differential phase contrast analysis.
In-depth structural characterization of the nanowalls by drop-by-drop ex situ
FE-SEM analysis provides insight into possible structure formation mechanisms.
Further investigation addresses the thermal stability of the particle morphology
and the enhancement of the surface-to-volume ratio by heat treatment (examined
by N2 physisorption).
article_type: original
author:
- first_name: Katja
full_name: Engelkemeier, Katja
id: '21743'
last_name: Engelkemeier
- first_name: Jörg
full_name: Lindner, Jörg
id: '20797'
last_name: Lindner
- first_name: Julius
full_name: Bürger, Julius
id: '46952'
last_name: Bürger
- first_name: Kathrin
full_name: Vaupel, Kathrin
last_name: Vaupel
- first_name: Marc
full_name: Hartmann, Marc
last_name: Hartmann
- first_name: Michael
full_name: Tiemann, Michael
id: '23547'
last_name: Tiemann
orcid: 0000-0003-1711-2722
- first_name: Kay-Peter
full_name: Hoyer, Kay-Peter
id: '48411'
last_name: Hoyer
- first_name: Mirko
full_name: Schaper, Mirko
id: '43720'
last_name: Schaper
citation:
ama: Engelkemeier K, Lindner J, Bürger J, et al. Nano-architectural complexity of
zinc oxide nanowall hollow microspheres and their structural properties. Nanotechnology.
2020;31:095701. doi:10.1088/1361-6528/ab55bc
apa: Engelkemeier, K., Lindner, J., Bürger, J., Vaupel, K., Hartmann, M., Tiemann,
M., Hoyer, K.-P., & Schaper, M. (2020). Nano-architectural complexity of zinc
oxide nanowall hollow microspheres and their structural properties. Nanotechnology,
31, 095701. https://doi.org/10.1088/1361-6528/ab55bc
bibtex: '@article{Engelkemeier_Lindner_Bürger_Vaupel_Hartmann_Tiemann_Hoyer_Schaper_2020,
title={Nano-architectural complexity of zinc oxide nanowall hollow microspheres
and their structural properties}, volume={31}, DOI={10.1088/1361-6528/ab55bc},
journal={Nanotechnology}, author={Engelkemeier, Katja and Lindner, Jörg and Bürger,
Julius and Vaupel, Kathrin and Hartmann, Marc and Tiemann, Michael and Hoyer,
Kay-Peter and Schaper, Mirko}, year={2020}, pages={095701} }'
chicago: 'Engelkemeier, Katja, Jörg Lindner, Julius Bürger, Kathrin Vaupel, Marc
Hartmann, Michael Tiemann, Kay-Peter Hoyer, and Mirko Schaper. “Nano-Architectural
Complexity of Zinc Oxide Nanowall Hollow Microspheres and Their Structural Properties.”
Nanotechnology 31 (2020): 095701. https://doi.org/10.1088/1361-6528/ab55bc.'
ieee: 'K. Engelkemeier et al., “Nano-architectural complexity of zinc oxide
nanowall hollow microspheres and their structural properties,” Nanotechnology,
vol. 31, p. 095701, 2020, doi: 10.1088/1361-6528/ab55bc.'
mla: Engelkemeier, Katja, et al. “Nano-Architectural Complexity of Zinc Oxide Nanowall
Hollow Microspheres and Their Structural Properties.” Nanotechnology, vol.
31, 2020, p. 095701, doi:10.1088/1361-6528/ab55bc.
short: K. Engelkemeier, J. Lindner, J. Bürger, K. Vaupel, M. Hartmann, M. Tiemann,
K.-P. Hoyer, M. Schaper, Nanotechnology 31 (2020) 095701.
date_created: 2021-09-10T06:49:55Z
date_updated: 2023-06-01T14:29:58Z
department:
- _id: '9'
- _id: '158'
- _id: '301'
- _id: '286'
- _id: '35'
- _id: '307'
- _id: '2'
doi: 10.1088/1361-6528/ab55bc
intvolume: ' 31'
language:
- iso: eng
page: '095701'
publication: Nanotechnology
publication_identifier:
issn:
- 0957-4484
- 1361-6528
publication_status: published
quality_controlled: '1'
status: public
title: Nano-architectural complexity of zinc oxide nanowall hollow microspheres and
their structural properties
type: journal_article
user_id: '43720'
volume: 31
year: '2020'
...
---
_id: '25907'
abstract:
- lang: eng
text: The combined benefits of moisture-stable phosphonic acids and mesoporous
silica materials (SBA-15 and MCM-41) as large-surface-area solid supports offer
new opportunities for several applications, such as catalysis or drug delivery.
We present a comprehensive study of a straightforward synthesis method via direct
immobilization of several phosphonic acids and phosphoric acid esters on various
mesoporous silicas in a Dean–Stark apparatus with toluene as the solvent. Due
to the utilization of azeotropic distillation, there was no need to dry phosphonic
acids, phosphoric acid esters, solvents, or silicas prior to synthesis. In addition
to modeling phosphonic acids, immobilization of the important biomolecule adenosine
monophosphate (AMP) on the porous supports was also investigated. Due to the high
surface area of the mesoporous silicas, a possible catalytic application based
on immobilization of an organocatalyst for an asymmetric aldol reaction is discussed.
article_number: '249'
article_type: original
author:
- first_name: Christian
full_name: Weinberger, Christian
id: '11848'
last_name: Weinberger
- first_name: Tatjana
full_name: Heckel, Tatjana
last_name: Heckel
- first_name: Patrick
full_name: Schnippering, Patrick
last_name: Schnippering
- first_name: Markus
full_name: Schmitz, Markus
last_name: Schmitz
- first_name: Anpeng
full_name: Guo, Anpeng
last_name: Guo
- first_name: Waldemar
full_name: Keil, Waldemar
last_name: Keil
- first_name: Heinrich C.
full_name: Marsmann, Heinrich C.
last_name: Marsmann
- first_name: Claudia
full_name: Schmidt, Claudia
id: '466'
last_name: Schmidt
orcid: 0000-0003-3179-9997
- first_name: Michael
full_name: Tiemann, Michael
id: '23547'
last_name: Tiemann
orcid: 0000-0003-1711-2722
- first_name: René
full_name: Wilhelm, René
last_name: Wilhelm
citation:
ama: Weinberger C, Heckel T, Schnippering P, et al. Straightforward Immobilization
of Phosphonic Acids and Phosphoric Acid Esters on Mesoporous Silica and Their
Application in an Asymmetric Aldol Reaction. Nanomaterials. Published online
2019. doi:10.3390/nano9020249
apa: Weinberger, C., Heckel, T., Schnippering, P., Schmitz, M., Guo, A., Keil, W.,
Marsmann, H. C., Schmidt, C., Tiemann, M., & Wilhelm, R. (2019). Straightforward
Immobilization of Phosphonic Acids and Phosphoric Acid Esters on Mesoporous Silica
and Their Application in an Asymmetric Aldol Reaction. Nanomaterials, Article
249. https://doi.org/10.3390/nano9020249
bibtex: '@article{Weinberger_Heckel_Schnippering_Schmitz_Guo_Keil_Marsmann_Schmidt_Tiemann_Wilhelm_2019,
title={Straightforward Immobilization of Phosphonic Acids and Phosphoric Acid
Esters on Mesoporous Silica and Their Application in an Asymmetric Aldol Reaction},
DOI={10.3390/nano9020249}, number={249},
journal={Nanomaterials}, author={Weinberger, Christian and Heckel, Tatjana and
Schnippering, Patrick and Schmitz, Markus and Guo, Anpeng and Keil, Waldemar and
Marsmann, Heinrich C. and Schmidt, Claudia and Tiemann, Michael and Wilhelm, René},
year={2019} }'
chicago: Weinberger, Christian, Tatjana Heckel, Patrick Schnippering, Markus Schmitz,
Anpeng Guo, Waldemar Keil, Heinrich C. Marsmann, Claudia Schmidt, Michael Tiemann,
and René Wilhelm. “Straightforward Immobilization of Phosphonic Acids and Phosphoric
Acid Esters on Mesoporous Silica and Their Application in an Asymmetric Aldol
Reaction.” Nanomaterials, 2019. https://doi.org/10.3390/nano9020249.
ieee: 'C. Weinberger et al., “Straightforward Immobilization of Phosphonic
Acids and Phosphoric Acid Esters on Mesoporous Silica and Their Application in
an Asymmetric Aldol Reaction,” Nanomaterials, Art. no. 249, 2019, doi:
10.3390/nano9020249.'
mla: Weinberger, Christian, et al. “Straightforward Immobilization of Phosphonic
Acids and Phosphoric Acid Esters on Mesoporous Silica and Their Application in
an Asymmetric Aldol Reaction.” Nanomaterials, 249, 2019, doi:10.3390/nano9020249.
short: C. Weinberger, T. Heckel, P. Schnippering, M. Schmitz, A. Guo, W. Keil, H.C.
Marsmann, C. Schmidt, M. Tiemann, R. Wilhelm, Nanomaterials (2019).
date_created: 2021-10-08T10:44:56Z
date_updated: 2023-03-08T08:32:12Z
department:
- _id: '35'
- _id: '2'
- _id: '307'
- _id: '315'
doi: 10.3390/nano9020249
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://www.mdpi.com/2079-4991/9/2/249/pdf?version=1550901386
oa: '1'
publication: Nanomaterials
publication_identifier:
issn:
- 2079-4991
publication_status: published
quality_controlled: '1'
status: public
title: Straightforward Immobilization of Phosphonic Acids and Phosphoric Acid Esters
on Mesoporous Silica and Their Application in an Asymmetric Aldol Reaction
type: journal_article
user_id: '23547'
year: '2019'
...
---
_id: '25904'
abstract:
- lang: eng
text: We examined the effect of CaCl2 and LiCl on ice melting in mesoporous silica
(MCM-41 and SBA-15 silica). For that purpose, we determined the ice melting temperature
in pores of various size (pore radii between 1.9 and 11.1 nm) in water and aqueous
solutions up to high total solute molality (up to about 12 mol kg–1) using differential
scanning calorimetry. We found that both electrolytes reduce the ice melting temperature
within the pores. An exception is the melting of ice in the smallest pores, which
does not seem to be affected by the presence of solutes, most likely owing to
an exclusion of the ions from entering the pores. For all other pores, we observed
that the ice melting temperature decreases as a function of pore size and electrolyte
concentration. Using thermodynamic considerations as well as additional experimental
data we developed a parametrization that can be used to predict the ice melting
point as a function of pore size and total solute molality. For that purpose,
we extended a formulation of the effective water activity of aqueous solutions
under mechanical pressure toward its application in confinement and tested this
new parametrization on literature data.
article_type: original
author:
- first_name: Evelyn
full_name: Jantsch, Evelyn
last_name: Jantsch
- first_name: Christian
full_name: Weinberger, Christian
id: '11848'
last_name: Weinberger
- first_name: Michael
full_name: Tiemann, Michael
id: '23547'
last_name: Tiemann
orcid: 0000-0003-1711-2722
- first_name: Thomas
full_name: Koop, Thomas
last_name: Koop
citation:
ama: Jantsch E, Weinberger C, Tiemann M, Koop T. Phase Transitions of Ice in Aqueous
Salt Solutions within Nanometer-Sized Pores. The Journal of Physical Chemistry
C. Published online 2019:24566-24574. doi:10.1021/acs.jpcc.9b06527
apa: Jantsch, E., Weinberger, C., Tiemann, M., & Koop, T. (2019). Phase Transitions
of Ice in Aqueous Salt Solutions within Nanometer-Sized Pores. The Journal
of Physical Chemistry C, 24566–24574. https://doi.org/10.1021/acs.jpcc.9b06527
bibtex: '@article{Jantsch_Weinberger_Tiemann_Koop_2019, title={Phase Transitions
of Ice in Aqueous Salt Solutions within Nanometer-Sized Pores}, DOI={10.1021/acs.jpcc.9b06527},
journal={The Journal of Physical Chemistry C}, author={Jantsch, Evelyn and Weinberger,
Christian and Tiemann, Michael and Koop, Thomas}, year={2019}, pages={24566–24574}
}'
chicago: Jantsch, Evelyn, Christian Weinberger, Michael Tiemann, and Thomas Koop.
“Phase Transitions of Ice in Aqueous Salt Solutions within Nanometer-Sized Pores.”
The Journal of Physical Chemistry C, 2019, 24566–74. https://doi.org/10.1021/acs.jpcc.9b06527.
ieee: 'E. Jantsch, C. Weinberger, M. Tiemann, and T. Koop, “Phase Transitions of
Ice in Aqueous Salt Solutions within Nanometer-Sized Pores,” The Journal of
Physical Chemistry C, pp. 24566–24574, 2019, doi: 10.1021/acs.jpcc.9b06527.'
mla: Jantsch, Evelyn, et al. “Phase Transitions of Ice in Aqueous Salt Solutions
within Nanometer-Sized Pores.” The Journal of Physical Chemistry C, 2019,
pp. 24566–74, doi:10.1021/acs.jpcc.9b06527.
short: E. Jantsch, C. Weinberger, M. Tiemann, T. Koop, The Journal of Physical Chemistry
C (2019) 24566–24574.
date_created: 2021-10-08T10:41:52Z
date_updated: 2023-03-08T08:31:45Z
department:
- _id: '35'
- _id: '2'
- _id: '307'
doi: 10.1021/acs.jpcc.9b06527
language:
- iso: eng
page: 24566-24574
publication: The Journal of Physical Chemistry C
publication_identifier:
issn:
- 1932-7447
- 1932-7455
publication_status: published
quality_controlled: '1'
status: public
title: Phase Transitions of Ice in Aqueous Salt Solutions within Nanometer-Sized Pores
type: journal_article
user_id: '23547'
year: '2019'
...
---
_id: '25905'
abstract:
- lang: eng
text: A nanocomposite material based on copper(II) oxide (CuO) and its utilization
as a highly selective and stable gas-responsive electrical switch for hydrogen
sulphide (H2S) detection is presented. The material can be applied as a sensitive
layer for H2S monitoring, e.g., in biogas gas plants. CuO nanoparticles are embedded
in a rigid, nanoporous silica (SiO2) matrix to form an electrical percolating
network of low conducting CuO and, upon exposure to H2S, highly conducting copper(II)
sulphide (CuS) particles. By steric hindrance due to the silica pore walls, the
structure of the network is maintained even though the reversible reaction of
CuO to CuS is accompanied by significant volume expansion. The conducting state
of the percolating network can be controlled by a variety of parameters, such
as temperature, electrode layout, and network topology of the porous silica matrix.
The latter means that this new type of sensing material has a structure-encoded
detection limit for H2S, which offers new application opportunities. The fabrication
process of the mesoporous CuO@SiO2 composite as well as the sensor design and
characteristics are described in detail. In addition, theoretical modeling of
the percolation effect by Monte-Carlo simulations yields deeper insight into the
underlying percolation mechanism and the observed response characteristics.
article_number: '1904505'
article_type: original
author:
- first_name: Andrej
full_name: Paul, Andrej
last_name: Paul
- first_name: Bertram
full_name: Schwind, Bertram
last_name: Schwind
- first_name: Christian
full_name: Weinberger, Christian
id: '11848'
last_name: Weinberger
- first_name: Michael
full_name: Tiemann, Michael
id: '23547'
last_name: Tiemann
orcid: 0000-0003-1711-2722
- first_name: Thorsten
full_name: Wagner, Thorsten
last_name: Wagner
citation:
ama: 'Paul A, Schwind B, Weinberger C, Tiemann M, Wagner T. Gas Responsive Nanoswitch:
Copper Oxide Composite for Highly Selective H2S Detection. Advanced Functional
Materials. Published online 2019. doi:10.1002/adfm.201904505'
apa: 'Paul, A., Schwind, B., Weinberger, C., Tiemann, M., & Wagner, T. (2019).
Gas Responsive Nanoswitch: Copper Oxide Composite for Highly Selective H2S Detection.
Advanced Functional Materials, Article 1904505. https://doi.org/10.1002/adfm.201904505'
bibtex: '@article{Paul_Schwind_Weinberger_Tiemann_Wagner_2019, title={Gas Responsive
Nanoswitch: Copper Oxide Composite for Highly Selective H2S Detection}, DOI={10.1002/adfm.201904505}, number={1904505},
journal={Advanced Functional Materials}, author={Paul, Andrej and Schwind, Bertram
and Weinberger, Christian and Tiemann, Michael and Wagner, Thorsten}, year={2019}
}'
chicago: 'Paul, Andrej, Bertram Schwind, Christian Weinberger, Michael Tiemann,
and Thorsten Wagner. “Gas Responsive Nanoswitch: Copper Oxide Composite for Highly
Selective H2S Detection.” Advanced Functional Materials, 2019. https://doi.org/10.1002/adfm.201904505.'
ieee: 'A. Paul, B. Schwind, C. Weinberger, M. Tiemann, and T. Wagner, “Gas Responsive
Nanoswitch: Copper Oxide Composite for Highly Selective H2S Detection,” Advanced
Functional Materials, Art. no. 1904505, 2019, doi: 10.1002/adfm.201904505.'
mla: 'Paul, Andrej, et al. “Gas Responsive Nanoswitch: Copper Oxide Composite for
Highly Selective H2S Detection.” Advanced Functional Materials, 1904505,
2019, doi:10.1002/adfm.201904505.'
short: A. Paul, B. Schwind, C. Weinberger, M. Tiemann, T. Wagner, Advanced Functional
Materials (2019).
date_created: 2021-10-08T10:42:50Z
date_updated: 2023-03-22T09:11:49Z
department:
- _id: '35'
- _id: '2'
- _id: '307'
doi: 10.1002/adfm.201904505
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://onlinelibrary.wiley.com/doi/epdf/10.1002/adfm.201904505
oa: '1'
publication: Advanced Functional Materials
publication_identifier:
issn:
- 1616-301X
- 1616-3028
publication_status: published
quality_controlled: '1'
status: public
title: 'Gas Responsive Nanoswitch: Copper Oxide Composite for Highly Selective H2S
Detection'
type: journal_article
user_id: '23547'
year: '2019'
...
---
_id: '25908'
abstract:
- lang: eng
text: Herein we present a new proton-conducting iron(II) metal–organic framework
(MOF) of an unusual structure formed by chains of alternating bistriazolate-p-benzoquinone
anions and iron(II) cations with four axially coordinated water molecules. These
chains assemble via π–π stacking between the aromatic units to form a three-dimensional
grid-like network with channel pores filled with water molecules. The material
was structurally characterized by single-crystal XRD analysis, and its water and
thermal stability was investigated. The proton conductivity was studied by impedance
measurements on needle-like single crystals. A simple but efficient measurement
setup consisting of interdigital electrodes was used. The influence of the crystal
orientation, temperature, and humidity was investigated. The iron(II)-MOF showed
the highest proton conductivity of 3.3·10–3 S cm–1 at 22 °C and 94% relative humidity.
Contrary to most known structures, the conductivity in this material is controlled
by chemical properties of the pore system rather than by grain boundaries. The
presented material is the starting point for further tailoring the proton-conducting
properties, independent of morphological features which could find potential applications
as membrane materials in proton-exchange membrane fuel cells.
article_type: original
author:
- first_name: Hana
full_name: Bunzen, Hana
last_name: Bunzen
- first_name: Ali
full_name: Javed, Ali
last_name: Javed
- first_name: Danielle
full_name: Klawinski, Danielle
last_name: Klawinski
- first_name: Anton
full_name: Lamp, Anton
last_name: Lamp
- first_name: Maciej
full_name: Grzywa, Maciej
last_name: Grzywa
- first_name: Andreas
full_name: Kalytta-Mewes, Andreas
last_name: Kalytta-Mewes
- first_name: Michael
full_name: Tiemann, Michael
id: '23547'
last_name: Tiemann
orcid: 0000-0003-1711-2722
- first_name: Hans-Albrecht Krug
full_name: von Nidda, Hans-Albrecht Krug
last_name: von Nidda
- first_name: Thorsten
full_name: Wagner, Thorsten
last_name: Wagner
- first_name: Dirk
full_name: Volkmer, Dirk
last_name: Volkmer
citation:
ama: Bunzen H, Javed A, Klawinski D, et al. Anisotropic Water-Mediated Proton Conductivity
in Large Iron(II) Metal–Organic Framework Single Crystals for Proton-Exchange
Membrane Fuel Cells. ACS Applied Nano Materials. Published online 2019:291-298.
doi:10.1021/acsanm.8b01902
apa: Bunzen, H., Javed, A., Klawinski, D., Lamp, A., Grzywa, M., Kalytta-Mewes,
A., Tiemann, M., von Nidda, H.-A. K., Wagner, T., & Volkmer, D. (2019). Anisotropic
Water-Mediated Proton Conductivity in Large Iron(II) Metal–Organic Framework Single
Crystals for Proton-Exchange Membrane Fuel Cells. ACS Applied Nano Materials,
291–298. https://doi.org/10.1021/acsanm.8b01902
bibtex: '@article{Bunzen_Javed_Klawinski_Lamp_Grzywa_Kalytta-Mewes_Tiemann_von Nidda_Wagner_Volkmer_2019,
title={Anisotropic Water-Mediated Proton Conductivity in Large Iron(II) Metal–Organic
Framework Single Crystals for Proton-Exchange Membrane Fuel Cells}, DOI={10.1021/acsanm.8b01902},
journal={ACS Applied Nano Materials}, author={Bunzen, Hana and Javed, Ali and
Klawinski, Danielle and Lamp, Anton and Grzywa, Maciej and Kalytta-Mewes, Andreas
and Tiemann, Michael and von Nidda, Hans-Albrecht Krug and Wagner, Thorsten and
Volkmer, Dirk}, year={2019}, pages={291–298} }'
chicago: Bunzen, Hana, Ali Javed, Danielle Klawinski, Anton Lamp, Maciej Grzywa,
Andreas Kalytta-Mewes, Michael Tiemann, Hans-Albrecht Krug von Nidda, Thorsten
Wagner, and Dirk Volkmer. “Anisotropic Water-Mediated Proton Conductivity in Large
Iron(II) Metal–Organic Framework Single Crystals for Proton-Exchange Membrane
Fuel Cells.” ACS Applied Nano Materials, 2019, 291–98. https://doi.org/10.1021/acsanm.8b01902.
ieee: 'H. Bunzen et al., “Anisotropic Water-Mediated Proton Conductivity
in Large Iron(II) Metal–Organic Framework Single Crystals for Proton-Exchange
Membrane Fuel Cells,” ACS Applied Nano Materials, pp. 291–298, 2019, doi:
10.1021/acsanm.8b01902.'
mla: Bunzen, Hana, et al. “Anisotropic Water-Mediated Proton Conductivity in Large
Iron(II) Metal–Organic Framework Single Crystals for Proton-Exchange Membrane
Fuel Cells.” ACS Applied Nano Materials, 2019, pp. 291–98, doi:10.1021/acsanm.8b01902.
short: H. Bunzen, A. Javed, D. Klawinski, A. Lamp, M. Grzywa, A. Kalytta-Mewes,
M. Tiemann, H.-A.K. von Nidda, T. Wagner, D. Volkmer, ACS Applied Nano Materials
(2019) 291–298.
date_created: 2021-10-08T10:46:06Z
date_updated: 2023-03-08T08:30:01Z
department:
- _id: '35'
- _id: '2'
- _id: '307'
doi: 10.1021/acsanm.8b01902
language:
- iso: eng
page: 291-298
publication: ACS Applied Nano Materials
publication_identifier:
issn:
- 2574-0970
- 2574-0970
publication_status: published
quality_controlled: '1'
status: public
title: Anisotropic Water-Mediated Proton Conductivity in Large Iron(II) Metal–Organic
Framework Single Crystals for Proton-Exchange Membrane Fuel Cells
type: journal_article
user_id: '23547'
year: '2019'
...