Vibrational spectroscopy of a silane monolayer at air/solid and liquid/solid interfaces using sum-frequency generation

We present the first application of infrared-visible sum-frequency generation to studies of liquid/solid interfaces. The spectra in the CH stretch region of a saturated monolayer of octadecyltrichlorosilane (OTS) adsorbed at various interfaces bound by a fused silica substrate were measured and comp...

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Bibliographic Details
Published in:Chemical physics letters 1988-02, Vol.144 (1), p.1-5
Main Authors: Guyot-Sionnest, P., Superfine, R., Hunt, J.H., Shen, Y.R.
Format: Article
Language:English
Subjects:
Chemistry
Exact sciences and technology
General and physical chemistry
Solid-liquid interface
Surface physical chemistry
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Summary:We present the first application of infrared-visible sum-frequency generation to studies of liquid/solid interfaces. The spectra in the CH stretch region of a saturated monolayer of octadecyltrichlorosilane (OTS) adsorbed at various interfaces bound by a fused silica substrate were measured and compared. In every case, it was found that the OTS molecules were oriented with the alkane chains normal to the surface. The adsorption of OTS on silica from a solution was also monitored in situ in real time.
ISSN:0009-2614
1873-4448
DOI:10.1016/0009-2614(88)87079-9