Electric-field-dependent thermal fluctuations of giant vesicles

Mitov, Michel; Méléard, Philippe; Winterhalter, Mathias; Angelova, Maria; Bothorel, P.

doi:10.1103/physreve.48.628

Cited by 47 publications

(46 citation statements)

References 11 publications

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“…This method has been applied to vesicles in water which at intermediate field frequencies (ω = 2 kHz) assume prolate deformation with the longer axis oriented in the field direction (Niggemann et al 1995). At higher frequencies (a few kHz) and again for vesicles in water medium a prolate-oblate transition is observed (Mitov et al 1993, Peterlin et al 2000 as theoretically predicted earlier (Hyuga et al 1991c(Hyuga et al , 1993.…”

Section: Vesicles In Alternating Electric (Ac) Fieldsmentioning

confidence: 88%

A practical guide to giant vesicles. Probing the membrane nanoregime via optical microscopy

Dimova

Aranda

Bezlyepkina

et al. 2006

J. Phys.: Condens. Matter

297

321

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Research on giant vesicles is becoming increasingly popular. Giant vesicles provide model biomembrane systems for systematic measurements of mechanical and rheological properties of bilayers as a function of membrane composition and temperature, as well as hydrodynamic interactions. Membrane response to external factors (for example electric fields, ions and amphiphilic molecules) can be directly visualized under the microscope. In this paper we review our current understanding of lipid bilayers as obtained from studies on giant unilamellar vesicles. Because research on giant vesicles increasingly attracts the interest of scientists from various backgrounds, we also try to provide a concise introduction for newcomers in the field. Finally, we summarize some recent developments on curvature effects induced by polymers, domain formation in membranes and shape transitions induced by electric fields.

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Section: Vesicles In Alternating Electric (Ac) Fieldsmentioning

confidence: 88%

A practical guide to giant vesicles. Probing the membrane nanoregime via optical microscopy

Dimova

Aranda

Bezlyepkina

et al. 2006

J. Phys.: Condens. Matter

297

321

View full text Add to dashboard Cite

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“…The frequency dependence of vesicle deformation has been studied in detail, 36,[39][40][41]44,45 but the influence of solution conductivities has not been well explored. Note that in contrast to cells, one may vary both the external and the internal conductivity for vesicles.…”

Section: 43mentioning

confidence: 99%

Giant vesicles in electric fields

et al. 2007

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This review is dedicated to electric field effects on giant unilamellar vesicles, a cell-size membrane system. We summarize various types of behavior observed when vesicles are subjected either to weak AC fields at various frequency, or to strong DC pulses. Different processes such as electrodeformation, -poration and -fusion of giant vesicles are considered. We describe some recent developments, which allowed us to detect the dynamics of the vesicle response with a resolution below milliseconds for all of these processes. Novel aspects on electric field effects on vesicles in the gel phase are introduced.

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“…The classical example is impedance spectroscopy in electrochemistry [2,3,4,5], but electrochemical relaxation is also being increasingly exploited in colloids and microfluidics [6]. For example, alternating electric fields have been used to pump or mix liquid electrolytes [7,8,9,10,11,12,13,14,15,16,17,18], to separate or self-assemble colloids near electrodes [19,20,21,22,23,24,25], and to manipulate polarizable particles [16,26,27,28,29,30,31] or biological cells and vesicles [32,33,34].…”

Section: Introductionmentioning

confidence: 99%

Nonlinear electrochemical relaxation around conductors

2006

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We analyze the simplest problem of electrochemical relaxation in more than one dimension -the response of an uncharged, ideally polarizable metallic sphere (or cylinder) in a symmetric, binary electrolyte to a uniform electric field. In order to go beyond the circuit approximation for thin double layers, our analysis is based on the Poisson-Nernst-Planck (PNP) equations of dilute solution theory. Unlike most previous studies, however, we focus on the nonlinear regime, where the applied voltage across the conductor is larger than the thermal voltage. In such strong electric fields, the classical model predicts that the double layer adsorbs enough ions to produce bulk concentration gradients and surface conduction. Our analysis begins with a general derivation of surface conservation laws in the thin double-layer limit, which provide effective boundary conditions on the quasi-neutral bulk. We solve the resulting nonlinear partial differential equations numerically for strong fields and also perform a time-dependent asymptotic analysis for weaker fields, where bulk diffusion and surface conduction arise as first-order corrections. We also derive various dimensionless parameters comparing surface to bulk transport processes, which generalize the Bikerman-Dukhin number. Our results have basic relevance for double-layer charging dynamics and nonlinear electrokinetics in the ubiquitous PNP approximation.

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Electric-field-dependent thermal fluctuations of giant vesicles

Cited by 47 publications

References 11 publications

A practical guide to giant vesicles. Probing the membrane nanoregime via optical microscopy

A practical guide to giant vesicles. Probing the membrane nanoregime via optical microscopy

Giant vesicles in electric fields

Nonlinear electrochemical relaxation around conductors

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