Berlin 2018 – wissenschaftliches Programm
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DS: Fachverband Dünne Schichten
DS 17: Poster Session I
DS 17.67: Poster
Dienstag, 13. März 2018, 18:15–20:15, Poster B
Gas adsorption on self-assembled monolayers — •Christian Albers, Susanne Dogan, Michael Paulus, and Metin Tolan — Fakultät Physik/DELTA, TU Dortmund
The influence of gases on hydrophobic surfaces especially on self-assembled monolayers (SAM) is in focus of the recent research [1, 2].
An X-ray reflectivity study on the adsorption behaviour of different organic gases on long alkyl chains (Octadecyltrichlorosilane (OTS) SiCl3C18H37) is presented. Silicon wafers were exposed to piranhia solution to get a hydrophilic interface and then treated with OTS-solution in order to induce SAM formation on the surface [3]. Subsequently, they were exposed to dense gas phases near the condensation pressure of isobutane, perfluorobutane and octafluoropropane. The results show, that the SAM are not penetrated by the gas molecules. Even at pressures close to the condensation pressures of the used gases there is no change in the SAM structures.
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F. Giebel et al. Coll. Surf. A 504 (2016), S 126-130.
M. Mezger et al. Proc. Natl. Acad. Sci. U.S.A. 103 (2006), S. 18401.