Stretching and relaxation of vesicles

H. Zhou, B. Burrola Gabilondo, W. Losert, W. Water, van de

Research output: Contribution to journalArticleAcademicpeer-review

24 Citations (Scopus)
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We study the shape relaxation of spherical giant unilamellar vesicles which have been deformed far from equilibrium into ellipsoids using optical tweezers. The relaxation back to a sphere is determined by elastic constants of the vesicles, and their excess area, parameters that are obtained for each stretched vesicle from shape fluctuations in thermal equilibrium, as well as low Reynolds number fluid flow. The relaxation time could be compared favorably to a simple formula which encompasses the joint effect of membrane rigidity and fluid flow. The time constant of the stretched vesicle is slower than that of its thermal fluctuations, which agrees with a recent theory; however, it is one order of magnitude faster than predicted.
Original languageEnglish
Article number011905
Pages (from-to)011905-1/8
Number of pages8
JournalPhysical Review E - Statistical, Nonlinear, and Soft Matter Physics
Publication statusPublished - 2011


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