The interaction between stearic acid monolayers and butane under elevated pressures
| Autor: | Steffen Bieder, F. J. Giebel, Julia Nase, Michael Paulus, Irena Kiesel, Metin Tolan |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Chemistry
Condensation Butane 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences chemistry.chemical_compound Colloid and Surface Chemistry Adsorption Membrane Chemical engineering Monolayer Isobutane Organic chemistry lipids (amino acids peptides and proteins) Stearic acid 0210 nano-technology Lipid bilayer |
| Zdroj: | Colloids and Surfaces A: Physicochemical and Engineering Aspects. 504:126-130 |
| ISSN: | 0927-7757 |
| DOI: | 10.1016/j.colsurfa.2016.05.067 |
| Popis: | A study on the interaction between butane and lipid membranes is presented. Monomolecular films of stearic acid were prepared on a water surface and were exposed to dense gas phases of n -butane and isobutane. From X-ray reflectivity measurements and grazing incidence X-ray diffraction, the accumulation of gas molecules at the liquid–gas interface was analyzed. We show that the gas molecules penetrate into the lipid membrane and accumulate between the head group and tail group of the lipids. This process goes in hand with an increase of the long-range lateral crystallographic order within the lipid film. This and the formation of multilayer islands points to an expulsion of lipids by the gas molecules. At higher pressures close to the condensation pressure of the studied gases, the vertical and lateral order is lost, indicating an adsorbed liquid film in which the lipids are dissolved. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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