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

Michiel Muller; Juleon M. Schins; Sylvie Roke; Mischa Bonn

doi:10.1117/12.499817

9 July 2003 Phase transitions in a lipid monolayer observed with vibrational sum-frequency generation

Michiel Muller, Juleon M. Schins, Sylvie Roke, Mischa Bonn

Proceedings Volume 4964, Three-Dimensional and Multidimensional Microscopy: Image Acquisition and Processing X; (2003) https://doi.org/10.1117/12.499817
Event: Biomedical Optics, 2003, San Jose, CA, United States

Abstract

Using both vibrational sum-frequency generation and fluorescence microscopy, the phase behavior 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.

Citation Download Citation

Michiel Muller, Juleon M. Schins, Sylvie Roke, and Mischa Bonn "Phase transitions in a lipid monolayer observed with vibrational sum-frequency generation", Proc. SPIE 4964, Three-Dimensional and Multidimensional Microscopy: Image Acquisition and Processing X, (9 July 2003); https://doi.org/10.1117/12.499817

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