Fluorescence Microscopy Imaging of Giant Folding in a Catanionic Monolayer

被引：15

作者：

Coppock, Joseph D. ^{[2
]}

Krishan, Kapilanjan ^{[1
]}

Dennin, Michael ^{[1
]}

Moore, Brian G. ^{[2
]}

机构：

[1] Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA

[2] Augustana Coll, Dept Chem, Sioux Falls, SD 57197 USA

来源：

LANGMUIR | 2009年 / 25卷 / 09期

关键词：

AIR-WATER-INTERFACE; LIPID MONOLAYERS; LANGMUIR MONOLAYERS; MIXED MONOLAYERS; FORCE MICROSCOPY; PALMITIC ACID; COLLAPSE; TRANSITIONS; STRESS; SURFACTANTS;

D O I：

10.1021/la803773y

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The behavior of the catanionic system of dioctadecyldimethylammonium bromide (DODAB) and sodium dodecyl sulfate (SDS) was investigated at 23 +/- 1 degrees C at the air-water interface using a Langmuir trough. The surface pressure as a function of surface area was measured while monitoring domain structures using epifluorescence microscopy. At high surface densities, the monolayer exhibits collapse through reversible folding at about 47 mN m(-1). This corresponds to the DODAB collapse surface pressure. The number of folds increases with the rate of compression speed and is history-dependent.

引用

页码：5006 / 5011

页数：6

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