Intramolecular and Lattice Melting in n-Alkane Monolayers: An Analog of Melting in Lipid Bilayers

Flemming Yssing Hansen, K.W. Herwig, B. Matthies, H Taub

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Abstract

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.
Original languageEnglish
JournalPhysical Review Letters
Volume83
Issue number12
Pages (from-to)2362-2365
ISSN0031-9007
DOIs
Publication statusPublished - 1999

Bibliographical note

Copyright (1999) by the American Physical Society.

Keywords

  • BUTANE
  • INTERFACE
  • ADSORPTION
  • MOLECULAR-DYNAMICS
  • DEUTERIUM MAGNETIC-RESONANCE
  • GRAPHITE

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