[{"quality_controlled":"1","year":"2014","date_created":"2021-01-13T10:12:51Z","title":"Toward a microscopic understanding of the calcium-silicate-hydrates/water interface","publication":"APPLIED SURFACE SCIENCE","abstract":[{"lang":"eng","text":"Calcium-Silicate-Hydrates (C-S-H) are the main binding phases in most concrete which is the primarily used composite construction material in the world. However, a big lack is cleaving between the actual knowledge about C-S-H, compared to what could be reached using state-of-the-art technologies of modern research. In this article, the formation of a C-S-H phase on a native oxide covered silicon wafer is investigated by means of in-situ attenuated total reflection infrared (ATR-IR) and ex-situ surface-enhanced Raman spectroscopy (SERS). The total thickness of the C-S-H phase is determined by X-ray photoelectron spectroscopy (XPS) to be 3 nm. The formation appears to be reversible depending on the environment pH value and can be performed at room temperature. Based on density functional theory (DFT) calculations, it is shown that the C-S-H phase in the presence of water will change its chemical composition in order to reach the thermodynamic ground state of the system. This change is achieved by a metal-proton exchange reaction. The stoichiometry of these metal-proton exchange reactions is nearly independent of the environment pH value. Electrokinetic measurements yield isoelectric points of 2.0 and 2.6 for the native oxide covered silicon wafer (SiO2) and the C-S-H phase. This is consistent with a predominance of Si-O sites at the C-S-H/water interface. (C) 2013 Elsevier B. V. All rights reserved."}],"external_id":{"isi":["000329060100032"]},"language":[{"iso":"eng"}],"publication_status":"published","publication_identifier":{"issn":["0169-4332"],"eissn":["1873-5584"]},"citation":{"chicago":"Ebbert, Christoph, Guido Grundmeier, Nadine Buitkamp, Alexander Kroeger, Florian Messerschmidt, and Peter Thissen. “Toward a Microscopic Understanding of the Calcium-Silicate-Hydrates/Water Interface.” <i>APPLIED SURFACE SCIENCE</i> 290 (2014): 207–14. <a href=\"https://doi.org/10.1016/j.apsusc.2013.11.045\">https://doi.org/10.1016/j.apsusc.2013.11.045</a>.","ieee":"C. Ebbert, G. Grundmeier, N. Buitkamp, A. Kroeger, F. Messerschmidt, and P. Thissen, “Toward a microscopic understanding of the calcium-silicate-hydrates/water interface,” <i>APPLIED SURFACE SCIENCE</i>, vol. 290, pp. 207–214, 2014, doi: <a href=\"https://doi.org/10.1016/j.apsusc.2013.11.045\">10.1016/j.apsusc.2013.11.045</a>.","ama":"Ebbert C, Grundmeier G, Buitkamp N, Kroeger A, Messerschmidt F, Thissen P. Toward a microscopic understanding of the calcium-silicate-hydrates/water interface. <i>APPLIED SURFACE SCIENCE</i>. 2014;290:207-214. doi:<a href=\"https://doi.org/10.1016/j.apsusc.2013.11.045\">10.1016/j.apsusc.2013.11.045</a>","short":"C. Ebbert, G. Grundmeier, N. Buitkamp, A. Kroeger, F. Messerschmidt, P. Thissen, APPLIED SURFACE SCIENCE 290 (2014) 207–214.","bibtex":"@article{Ebbert_Grundmeier_Buitkamp_Kroeger_Messerschmidt_Thissen_2014, title={Toward a microscopic understanding of the calcium-silicate-hydrates/water interface}, volume={290}, DOI={<a href=\"https://doi.org/10.1016/j.apsusc.2013.11.045\">10.1016/j.apsusc.2013.11.045</a>}, journal={APPLIED SURFACE SCIENCE}, author={Ebbert, Christoph and Grundmeier, Guido and Buitkamp, Nadine and Kroeger, Alexander and Messerschmidt, Florian and Thissen, Peter}, year={2014}, pages={207–214} }","mla":"Ebbert, Christoph, et al. “Toward a Microscopic Understanding of the Calcium-Silicate-Hydrates/Water Interface.” <i>APPLIED SURFACE SCIENCE</i>, vol. 290, 2014, pp. 207–14, doi:<a href=\"https://doi.org/10.1016/j.apsusc.2013.11.045\">10.1016/j.apsusc.2013.11.045</a>.","apa":"Ebbert, C., Grundmeier, G., Buitkamp, N., Kroeger, A., Messerschmidt, F., &#38; Thissen, P. (2014). Toward a microscopic understanding of the calcium-silicate-hydrates/water interface. <i>APPLIED SURFACE SCIENCE</i>, <i>290</i>, 207–214. <a href=\"https://doi.org/10.1016/j.apsusc.2013.11.045\">https://doi.org/10.1016/j.apsusc.2013.11.045</a>"},"page":"207-214","intvolume":"       290","date_updated":"2025-11-18T12:05:39Z","author":[{"first_name":"Christoph","last_name":"Ebbert","id":"7266","full_name":"Ebbert, Christoph"},{"last_name":"Grundmeier","id":"194","full_name":"Grundmeier, Guido","first_name":"Guido"},{"first_name":"Nadine","last_name":"Buitkamp","id":"1449","full_name":"Buitkamp, Nadine"},{"full_name":"Kroeger, Alexander","last_name":"Kroeger","first_name":"Alexander"},{"first_name":"Florian","last_name":"Messerschmidt","full_name":"Messerschmidt, Florian"},{"first_name":"Peter","full_name":"Thissen, Peter","last_name":"Thissen"}],"volume":290,"doi":"10.1016/j.apsusc.2013.11.045","type":"journal_article","status":"public","_id":"20945","user_id":"7266","department":[{"_id":"35"},{"_id":"302"},{"_id":"321"}],"isi":"1"},{"isi":"1","_id":"20947","user_id":"7266","department":[{"_id":"35"},{"_id":"302"},{"_id":"321"}],"status":"public","type":"journal_article","doi":"10.1016/j.apsusc.2010.09.044","date_updated":"2022-01-06T06:54:41Z","author":[{"first_name":"M.","last_name":"Maxisch","full_name":"Maxisch, M."},{"id":"7266","full_name":"Ebbert, Christoph","last_name":"Ebbert","first_name":"Christoph"},{"first_name":"B.","last_name":"Torun","full_name":"Torun, B."},{"first_name":"N.","full_name":"Fink, N.","last_name":"Fink"},{"full_name":"de los Arcos, T.","last_name":"de los Arcos","first_name":"T."},{"full_name":"Lackmann, J.","last_name":"Lackmann","first_name":"J."},{"first_name":"H. J.","full_name":"Maier, H. J.","last_name":"Maier"},{"last_name":"Grundmeier","full_name":"Grundmeier, Guido","id":"194","first_name":"Guido"}],"volume":257,"citation":{"bibtex":"@article{Maxisch_Ebbert_Torun_Fink_de los Arcos_Lackmann_Maier_Grundmeier_2011, title={PM-IRRAS studies of the adsorption and stability of organophosphonate monolayers on passivated NiTi surfaces}, volume={257}, DOI={<a href=\"https://doi.org/10.1016/j.apsusc.2010.09.044\">10.1016/j.apsusc.2010.09.044</a>}, number={6}, journal={APPLIED SURFACE SCIENCE}, author={Maxisch, M. and Ebbert, Christoph and Torun, B. and Fink, N. and de los Arcos, T. and Lackmann, J. and Maier, H. J. and Grundmeier, Guido}, year={2011}, pages={2011–2018} }","mla":"Maxisch, M., et al. “PM-IRRAS Studies of the Adsorption and Stability of Organophosphonate Monolayers on Passivated NiTi Surfaces.” <i>APPLIED SURFACE SCIENCE</i>, vol. 257, no. 6, 2011, pp. 2011–18, doi:<a href=\"https://doi.org/10.1016/j.apsusc.2010.09.044\">10.1016/j.apsusc.2010.09.044</a>.","short":"M. Maxisch, C. Ebbert, B. Torun, N. Fink, T. de los Arcos, J. Lackmann, H.J. Maier, G. Grundmeier, APPLIED SURFACE SCIENCE 257 (2011) 2011–2018.","apa":"Maxisch, M., Ebbert, C., Torun, B., Fink, N., de los Arcos, T., Lackmann, J., … Grundmeier, G. (2011). PM-IRRAS studies of the adsorption and stability of organophosphonate monolayers on passivated NiTi surfaces. <i>APPLIED SURFACE SCIENCE</i>, <i>257</i>(6), 2011–2018. <a href=\"https://doi.org/10.1016/j.apsusc.2010.09.044\">https://doi.org/10.1016/j.apsusc.2010.09.044</a>","ama":"Maxisch M, Ebbert C, Torun B, et al. PM-IRRAS studies of the adsorption and stability of organophosphonate monolayers on passivated NiTi surfaces. <i>APPLIED SURFACE SCIENCE</i>. 2011;257(6):2011-2018. doi:<a href=\"https://doi.org/10.1016/j.apsusc.2010.09.044\">10.1016/j.apsusc.2010.09.044</a>","chicago":"Maxisch, M., Christoph Ebbert, B. Torun, N. Fink, T. de los Arcos, J. Lackmann, H. J. Maier, and Guido Grundmeier. “PM-IRRAS Studies of the Adsorption and Stability of Organophosphonate Monolayers on Passivated NiTi Surfaces.” <i>APPLIED SURFACE SCIENCE</i> 257, no. 6 (2011): 2011–18. <a href=\"https://doi.org/10.1016/j.apsusc.2010.09.044\">https://doi.org/10.1016/j.apsusc.2010.09.044</a>.","ieee":"M. Maxisch <i>et al.</i>, “PM-IRRAS studies of the adsorption and stability of organophosphonate monolayers on passivated NiTi surfaces,” <i>APPLIED SURFACE SCIENCE</i>, vol. 257, no. 6, pp. 2011–2018, 2011."},"page":"2011-2018","intvolume":"       257","publication_status":"published","publication_identifier":{"issn":["0169-4332"],"eissn":["1873-5584"]},"language":[{"iso":"eng"}],"external_id":{"isi":["000285408700035"]},"abstract":[{"lang":"eng","text":"Alkylphosphonic acids of different alkyl chain lengths were adsorbed on electrochemically polished NiTi surfaces from ethanolic solutions. The electropolishing process led to passive films mainly composed of Ti-oxyhydroxide. The surface showed nanoscopic etching pits with a depths of about 2 nm and a diameter of about 20 nm. The interfacial binding mechanism of the phosphonic acid group to the oxyhydroxide surface and the ordering of the monolayer were spectroscopically analysed by means of infrared reflection absorption FTIR-spectroscopy with (PM-IRRAS) and without (IRRAS) photoelastic modulation. The comparison of IRRAS and PM-IRRAS data of the long chain octadecylphosphonic acid monolayer proved that the binding mechanism of the phosphonic acid group to the oxyhydroxide surface is based on a mono-or bidentate bond, which is not stable in the presence of high water activities. An alkyl chain length of 17 CH2 groups is required for the formation of self-assembled monolayers, which are stable in aqueous environments. These long chain aliphatic organophosphonic acid monolayers were shown to inhibit anodic and cathodic surface reactions. (C) 2010 Elsevier B.V. All rights reserved."}],"publication":"APPLIED SURFACE SCIENCE","title":"PM-IRRAS studies of the adsorption and stability of organophosphonate monolayers on passivated NiTi surfaces","date_created":"2021-01-13T10:12:53Z","year":"2011","quality_controlled":"1","issue":"6"}]