کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
596755 | 1454052 | 2008 | 7 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Stabilization of Langmuir monolayer of hydrophobic thiocholesterol molecules Stabilization of Langmuir monolayer of hydrophobic thiocholesterol molecules](/preview/png/596755.png)
The self-assembled monolayer of the thiocholesterol (TCh) exhibits interesting properties that can be used for various technological applications. TCh is predominantly a hydrophobic molecule, and it does not spread at the air–water interface to form a stable Langmuir monolayer. We have stabilized the TCh molecules in the cholesterol (Ch) monolayer. We find the mixed monolayer to be stable upto 0.75 mole fraction of TCh in Ch. The mixed monolayer shows an initial and a final collapse. On compressing the monolayer beyond the initial collapse, the TCh molecules squeeze out irreversibly from the mixed monolayer phase. The calculation of excess area per molecule for the TCh and Ch mixed monolayer system indicates an attractive interaction between the component molecules. Interestingly, the elasticity of the Ch monolayer reduces to less than half, and the monolayer becomes more fluidic due to the presence of even very minute quantity (5%) of TCh.
Journal: Colloids and Surfaces A: Physicochemical and Engineering Aspects - Volume 320, Issues 1–3, 1 May 2008, Pages 233–239