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Adsorption of organosilanes on iron and aluminium oxide surfaces

✍ Scribed by Quinton, J.; Thomsen, L.; Dastoor, P.

Publisher: John Wiley and Sons
Year: 1997
Tongue: English
Weight: 360 KB
Volume: 25
Category: Article
ISSN: 0142-2421
DOI: 10.1002/(sici)1096-9918(199711)25:12<931::aid-sia325>3.0.co;2-f

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✦ Synopsis

Thin Ðlms 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 signiÐcant di †erences 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 brieÑy. 1997

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