INADEQUACY OF LIFSHITZ THEORY FOR THIN LIQUID-FILMS

被引:129
作者
BEAGLEHOLE, D [1 ]
RADLINSKA, EZ [1 ]
NINHAM, BW [1 ]
CHRISTENSON, HK [1 ]
机构
[1] AUSTRALIAN NATL UNIV,RES SCH PHYS SCI,DEPT APPL MATH,CANBERRA,ACT 2601,AUSTRALIA
关键词
D O I
10.1103/PhysRevLett.66.2084
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We have studied the adsorption of cyclohexane and water on molecularly smooth mica using an angle-averaging, refractive-index-matching ellipsometric technique. The isotherms are linear for submonolayer coverages, showing the importance of entropy effects, and give finite thicknesses (almost-equal-to 2 nm) at saturation. The similarity of the two isotherms suggests that the adsorption is governed by nonspecific interactions. There is no evidence of layering but the isotherms do not agree with the Lifshitz theory of van der Waals forces.
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页码:2084 / 2087
页数:4
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