Intramolecular and lattice melting in n-alkane monolayers:: An analog of melting in lipid bilayers

被引:63
作者
Hansen, FY
Herwig, KW
Matthies, B
Taub, H
机构
[1] Tech Univ Denmark, Dept Chem, DK-2800 Lyngby, Denmark
[2] Univ Missouri, Dept Phys & Astron, Columbia, MO 65211 USA
[3] Univ Missouri, Res Reactor Facil, Columbia, MO 65211 USA
关键词
D O I
10.1103/PhysRevLett.83.2362
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
Molecular dynamics (MD) simulations and neutron diffraction experiments have been performed on n-dotriacontane (n-C32D66) monolayers adsorbed on a graphite basal-plane surface. The diffraction experiments show little change in the crystalline monolayer structure up to a temperature of similar to 350 K above which a large thermal expansion and decrease in coherence length occurs. The MD simulations provide evidence that this behavior is due to a phase transition in the monolayer in which intramolecular and translational order are lost simultaneously. This melting transition is qualitatively similar to the gel-to-fluid transition found in bilayer lipid membranes.
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页码:2362 / 2365
页数:4
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