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Inelastic electron tunneling spectroscopic study of the silane coupling agents: 1—Aminophenyltrimethoxysilane adsorbed on plasma grown aluminum oxide and effects of high humidity
Author(s) -
Furukawa T.,
Eib N. K.,
Mittal K. L.,
Anderson H. R.
Publication year - 1982
Publication title -
surface and interface analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.52
H-Index - 90
eISSN - 1096-9918
pISSN - 0142-2421
DOI - 10.1002/sia.740040605
Subject(s) - adsorption , silane , chemistry , inelastic electron tunneling spectroscopy , oxide , analytical chemistry (journal) , aluminium , photochemistry , quantum tunnelling , inorganic chemistry , materials science , organic chemistry , scanning tunneling spectroscopy , optoelectronics
The adsorption mechanism of aminophenyltrimethoxysilane adsorbed from the vapor on plasma grown aluminum oxide and effects of high humidity on the adsorbed silane were studied by inelastic electron tunneling spectroscopy (IETS). The IETS spectrum of aminophenyltrimethoxysilane contains the bands due to phenyl rings, methyl groups and amino groups. The NH 2 deformation mode is shifted to lower frequencies, which may imply that the silane is chemisorbed through the amino group. By exposing the sample to water vapor, the methoxy group hydrolizes and the resultant methanol is removed from the varrier region indicated by a significant loss of intensity of the CH 3 stretching and deformation modes. A loss of intensity of the NH 2 deformation mode was also observed after the exposure.