Intramolecular diffusive motion in alkane monolayers studied by high-resolution quasielastic neutron scattering and molecular dynamics simulations

Flemming Yssing Hansen, L. Criswell, D Fuhrmann, K.W. Herwig, A. Diama, R.M. Dimeo, D.A. Neumann, U.G. Volkmann, H. Taub

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Abstract

Molecular dynamics simulations of a tetracosane (n-C24H50) monolayer adsorbed on a graphite basal-plane surface show that there are diffusive motions associated with the creation and annihilation of gauche defects occurring on a time scale of similar to0.1-4 ns. We present evidence that these relatively slow motions are observable by high-energy-resolution quasielastic neutron scattering (QNS) thus demonstrating QNS as a technique, complementary to nuclear magnetic resonance, for studying conformational dynamics on a nanosecond time scale in molecular monolayers.
Original languageEnglish
JournalPhysical Review Letters
Volume92
Issue number4
Pages (from-to)046103
ISSN0031-9007
DOIs
Publication statusPublished - 2004

Bibliographical note

Copyright (2004) American Physical Society.

Keywords

  • LIPID-BILAYERS
  • FILMS
  • GRAPHITE

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