Direct visualization of phase transition dynamics in binary supported phospholipid bilayers using imaging ellipsometry

Alan W. Szmodis; Craig D. Blanchette; Andrey A. Levchenko; Alexandra Navrotsky; Marjorie L. Longo; Christine A. Orme; Atul N. Parikh

doi:10.1039/B801390J

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Soft Matter

Issue 6, 2008

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Direct visualization of phase transition dynamics in binary supported phospholipid bilayers using imaging ellipsometry

Alan W. Szmodis , Craig D. Blanchette , Andrey A. Levchenko , Alexandra Navrotsky , Marjorie L. Longo , Christine A. Orme and Atul N. Parikh

Soft Matter, 2008, 4, 1161-1164

DOI: 10.1039/B801390J
Received 28 Jan 2008, Accepted 14 Apr 2008
First published on the web 28 Apr 2008

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Abstract
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Via imaging ellipsometry, we study the phase transition dynamics induced by selective gelation of one component in a binary supported phopholipid bilayer. We find the modulation of two attendant morphological features: emergence of extended defect chains due to a net change in the molecular areas and fractal-like domains suggesting weak line tension. A time-lapse analysis of the ellipsometric images reveals the cluster size of 4–20 molecules undergoing gelation indicating weak cooperativity. These results demonstrate the use of ellipsometry for in situ, label-free, non-contact, and large-area imaging of dynamics in interfacial films.

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Domain area distribution, ellipsometric images, and differential scanning calorimetry results>
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Articles By

Alan W. Szmodis
Craig D. Blanchette
Andrey A. Levchenko
Alexandra Navrotsky
Marjorie L. Longo
Christine A. Orme
Atul N. Parikh

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Soft Matter

Direct visualization of phase transition dynamics in binary supported phospholipid bilayers using imaging ellipsometry

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