The structure of model membranes studied by vibrational sum frequency spectroscopy

Jonathan F.D. Liljeblad, Mark W. Rutland, Vincent Bulone, Magnus Johnson

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review

3 Citations (Scopus)

Abstract

The structure and order of insoluble Langmuir monolayers consisting of 1,2-distearoyl-sn-glycero-3-phosphatidylcholine (DSPC or 18:0 PC) and the surrounding water molecules have been investigated by vibrational sum frequency spectroscopy (VSFS). At surface pressures of 1, 15, and 57 mN/m corresponding to molecular areas of 53, 50, and 43 Å2, respectively, the DSPC molecules formed a well ordered film. Both the VSF signal from the methyl stretching vibrations of the lipid and the surrounding water increased with enhanced surface pressure, as a result of the higher surface density and increased order of the system. Water molecules hydrating the polar parts of the headgroup and in close contact to the hydrocarbon groups of the lipid were observed in all three polarization combinations of the laser beams, and distinguished by their different vibrational frequencies.

Original languageEnglish
Title of host publicationTrends in Colloid and Interface Science XXIII
EditorsSeyda Bucak
Place of PublicationHeidelberg
PublisherSpringer-Verlag
Pages9-12
Number of pages4
Volume137
ISBN (Electronic)9783642134616
ISBN (Print)9783642134609
DOIs
Publication statusPublished - 2010
Externally publishedYes

Publication series

NameProgress in Colloid and Polymer Science
Volume137
ISSN (Print)0340-255X

Keywords

  • Dspc
  • Langmuir film
  • Membrane
  • Sfg
  • Vibrational sum frequency spectroscopy

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