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Substrate and surface pressure dependencies of the molecular orientation and structure of arachidic acid monolayer films

✍ Scribed by Yasuhiko Fujimoto; Yukihiro Ozaki; Teiji Kato; Naoya Matsumoto; Keiji Iriyama

Publisher: Elsevier Science
Year: 1992
Tongue: English
Weight: 330 KB
Volume: 196
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(92)85980-o

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✦ Synopsis

Substrate and surface pressure dependencies of the molecular orientation and structure ofarachidic acid monolayer films have been investigated by infrared transmission and reflection-absorption (RA) spectroscopy. The following conclusions can be reached in the present study: ( 1 ) The structure of arachidic acid monolayer films deposited on CaF2 plates changes with the surface pressure; for example, the subcell packing of the hydrocarbon chains changes from hexagonal to orthorhombic for pressure increasing from 20 to 30 mN/m. (2) The structures of the films deposited on Au-evaporated glass slides do not show a marked dependency on the surface pressure, but the fraction of the trans-configuration for the C~-C~-C=O group increases with the pressure.

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