Static SIMS study on surfaces of chalcogenide glasses modified by an organic layer
(2012) Surface Science — Vol. 606, p. 1071-1077 (2012)
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- Chalcogenide glasses are useful optic materials that find applications in infrared spectroscopy, sensors and thermal imaging. A route for direct surface modification of such glasses with organic layers has been investigated by static Time of Flight Secondary Ion Mass Spectrometry (ToF-SIMS). The GAS (germanium– arsenic–selenium) glasses are modified by deposition followed by UV-irradiation of disulfide- or/and silane-functionalized organic molecules. SIMS analysis shows the characteristic fragments of the grafted molecules and organic–inorganic fragments which prove unambiguously the binding mode to the surface: disulfides, after S–S cleavage, are linked to arsenic and selenium; triethoxysilanes bind exclusively to oxidized germanium. The successive grafting of disulfide and silane compounds on the same substrate (IG2 glass with 33% of Ge) affords a “mixed” organic layer on the glass surface. From water contact angle measurements and X-ray Photo-electron Spectroscopy (XPS), the coverage density is not significantly improved comparatively to the “non-mixed” layers. However, the grafting of both types of molecules allows to reach a more homogeneous coverage.
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Amalric, J., Poleunis, C., Delcorte, A., & Marchand-Brynaert, J. (2012). Static SIMS study on surfaces of chalcogenide glasses modified by an organic layer. Surface Science, 606, 1071-1077. https://doi.org/10.1016/j.susc.2012.03.005 (Original work published 2012)