Phase transitions in a lipid monolayer observed with vibrational sum-frequency generation

Using both vibrational sum-frequency generation and fluorescence microscopy, the phase behaviour of a DPPC lipid monolayer on water is investigated as a function of surface pressure. The vibrational specificity of the sum-frequency generation techniques permits determining the order of the alkyl chains, as well as the average orientation of the terminal methyl group. A novel - and extremely sharp - phase transition is observed at low compression, which is attributed to a curling of the alkyl chains due to increased exposure of the (hydrophobic) alkyl chains to the water surface.


Published in:
Proceedings of SPIE - The International Society for Optical Engineering, 4964, null, 90-97
Year:
2003
ISSN:
0277786X
Other identifiers:
Scopus: 2-s2.0-0141828470
Laboratories:




 Record created 2013-02-08, last modified 2018-03-17


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