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Adsorption of organosilanes on iron and aluminium oxide surfaces
Author(s) -
Quinton J.,
Thomsen L.,
Dastoor P.
Publication year - 1997
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/(sici)1096-9918(199711)25:12<931::aid-sia325>3.0.co;2-f
Subject(s) - silane , adsorption , aluminium , iron oxide , chemistry , x ray photoelectron spectroscopy , aluminium oxide , crystallite , oxide , inorganic chemistry , aluminum oxide , chemical engineering , materials science , metallurgy , organic chemistry , crystallography , engineering
Thin films of a simple organosilane, propyltrimethoxysilane (PTMS), on polycrystalline aluminium and iron oxide substrates have been investigated using XPS. Comparison of the adsorption isotherms for the two substrates reveals significant differences between them. Although PTMS on iron oxide exhibits a Langmuir‐like isotherm, PTMS on aluminium oxide shows an unexpected decrease in adsorption at intermediate exposures. The results demonstrate that even for the simplest organosilanes and single‐component surfaces the formation of silane coatings on metals is complex and strongly dependent upon the nature of the surface. The implication of the results to silane coupling events (SCAs) is discussed briefly. © 1997 John Wiley & Sons, Ltd.