Translational and rotational diffusion of micrometer-sized solid domains in lipid membranes | Zendy

Eugene P. Petrov | Zendy; R. A. Petrosyan | Zendy; Petra Schwille | Zendy

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Translational and rotational diffusion of micrometer-sized solid domains in lipid membranes

Author(s) -

Eugene P. Petrov,

R. A. Petrosyan,

Petra Schwille

Publication year - 2012

Publication title -

soft matter

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.99

H-Index - 170

eISSN - 1744-6848

pISSN - 1744-683X

DOI - 10.1039/c2sm25796c

Subject(s) - rotational diffusion , membrane , micrometer , drag , vesicle , diffusion , brownian motion , phase (matter) , chemistry , lipid bilayer , rotation around a fixed axis , biological membrane , chemical physics , materials science , classical mechanics , physics , mechanics , thermodynamics , optics , organic chemistry , molecule , biochemistry , quantum mechanics

We use simultaneous observation of translational and rotational Brownian motion of domains in lipid membranes to test the hydrodynamics-based theory for the viscous drag on the membrane inclusion. We find that translational and rotational diffusion coefficients of micrometer-sized solid (gel-phase) domains in giant unilamellar vesicles showing fluid–gel phase coexistence are in excellent agreement with the theoretical predictions.

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