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The structure of model membranes studied by vibrational sum frequency spectroscopy
YKI – Ytkemiska institutet.
2010 (English)In: Progress in Colloid and Polymer Science, ISSN 0340-255X, E-ISSN 1437-8027, Vol. 137, 9-12 p.Article in journal (Refereed)
Abstract [en]

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 Å 2, 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.

Place, publisher, year, edition, pages
2010. Vol. 137, 9-12 p.
Keyword [en]
Dspc, Langmuir film, Membrane, Sfg, Vibrational sum frequency spectroscopy
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-27443DOI: 10.1007/978-3-642-13461-6_3OAI: oai:DiVA.org:ri-27443DiVA: diva2:1054448
Note
A3528Available from: 2016-12-08 Created: 2016-12-08Bibliographically approved

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