Substrate and surface pressure dependencies of the molecular orientation and structure of arachidic acid monolayer films
1992; Elsevier BV; Volume: 196; Issue: 3-4 Linguagem: Inglês
10.1016/0009-2614(92)85980-o
ISSN1873-4448
AutoresYasuhiko Fujimoto, Yukihiro Ozaki, Teiji Kato, Naoya Matsumoto, Keiji Iriyama,
Tópico(s)Thermodynamic properties of mixtures
ResumoSubstrate and surface pressure dependencies of the molecular orientation and structure of arachidic 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 CβCαCO group increases with the pressure.
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