DIRECT MEASUREMENT OF DEPLETION AND STRUCTURAL FORCES IN A MICELLAR SYSTEM

被引：253

作者：

RICHETTI, P ^{[1
]}

KEKICHEFF, P ^{[1
]}

机构：

[1] AUSTRALIAN NATL UNIV, RES SCH PHYS SCI, DEPT APPL MATH, CANBERRA, ACT 2601, AUSTRALIA

来源：

PHYSICAL REVIEW LETTERS | 1992年 / 68卷 / 12期

关键词：

D O I：

10.1103/PhysRevLett.68.1951

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The force as a function of separation is measured between two mica surfaces coated with adsorbed bilayers of cetyltrimethylammonium bromide (CTAB) and immersed in aqueous ionic micellar solutions of CTAB. At low separations double-layer forces are observed and arise solely from the dissociated counterions and free CTA+. At large separations, the repulsion is reduced and a secondary minimum in the interaction potential deepens when the micellar concentration is increased. Finally, at higher concentrations, structural effects superimpose an oscillatory force profile at further separations.

引用

页码：1951 / 1954

页数：4

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