Reversible formation of plastic two-dimensional lipid crystals

H. E. Gaub, V. T. Moy, H. M. McConnell

Research output: Contribution to journalArticle

80 Scopus citations

Abstract

Individual dipalmitoylphosphatidylcholine (DPPC) crystals formed in a monomolecular film of DPPC at the air-water interface have been studied by epifluorescence microscopy. For this purpose a new trough design was developed to enable the observation and tracking of a chosen crystal over periods of hours. We found that various observed crystal shapes are multiples of a basic domain structure. Each domain has a distinct in-plane director but no macroscopic symmetry. The complex crystal shapes were found to be reversible with respect to growth and decay. Trace amounts of cholesterol drastically alter the shapes of the crystals but change none of the above-mentioned properties. Upon monolayer compression, the crystals grow uniformly at the fluid-crystal interface while simultaneously elongating and thinning. This remarkable effect requires a high lateral plasticity of these two-dimensional crystals.

Original languageEnglish (US)
Pages (from-to)1721-1725
Number of pages5
JournalJournal of physical chemistry
Volume90
Issue number8
DOIs
StatePublished - Jan 1 1986

    Fingerprint

ASJC Scopus subject areas

  • Engineering(all)
  • Physical and Theoretical Chemistry

Cite this