Discrete and heterogeneous rotational dynamics of single membrane probe dyes in gel phase supported lipid bilayer

Benjamin C. Stevens, Taekjip Ha

Research output: Contribution to journalArticlepeer-review

Abstract

The rotational time trajectories of a membrane probe, diI(3), in supported bilayers of DPPC (1,2-dipalmitoyl-sn-glycero-3-phosphocholine) was measured to probe the local dynamics of of lipid bilayers in the gel phase. The molecular analysis of the rotational time scales showed heterogeneities among molecules. It was suggested that the heterogeneities are not caused by surface interactions and are intrinsic to the gel phase membrane. It was found that the rotational dynamics is temperature dependent and the thermally activated state for the rotational motion has a large entropic barrier.

Original languageEnglish (US)
Pages (from-to)3030-3039
Number of pages10
JournalJournal of Chemical Physics
Volume120
Issue number6
DOIs
StatePublished - Feb 8 2004
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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