Coppock Joseph D, Krishan Kapilanjan, Dennin Michael, Moore Brian G
Department of Chemistry, Augustana College, Sioux Falls, South Dakota 57197, USA.
Langmuir. 2009 May 5;25(9):5006-11. doi: 10.1021/la803773y.
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.
在23±1℃下，使用Langmuir槽在空气-水界面研究了二辛基二甲基溴化铵（DODAB）和十二烷基硫酸钠（SDS）的阴-阳离子体系的行为。在使用落射荧光显微镜监测畴结构的同时，测量了表面压力随表面积的变化。在高表面密度下，单层膜在约47 mN m⁻¹时通过可逆折叠而塌陷。这对应于DODAB的塌陷表面压力。折叠的数量随着压缩速度的增加而增加，并且与历史有关。
