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Rayleigh instability of charged drops and vesicles in the presence of counterions

DSpace at IIT Bombay

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Title Rayleigh instability of charged drops and vesicles in the presence of counterions
 
Creator THAOKAR, RM
DESHMUKH, SD
 
Subject interfacial instability
curvature elasticity
electrical forces
surface-charge
double layers
droplets
stability
oscillations
discharge
dynamics
 
Description Rayleigh instability of charged conducting drops, in the viscous regime, is analyzed in the presence of counterions in the surrounding fluid. The Rayleigh criterion for the instability is derived in the Debye-Huckel approximation. It is found that the critical charge for the instability is reduced in the presence of counterions. The analysis is carried out for charged vesicles, with symmetric double layers across the bilayer, and the critical charge for the instability is determined. It is found that vesicles can indeed become unstable at high surface potentials. These results should be important in biological systems, where cells, with charged membranes, are immersed in electrolyte solutions. Additionally, the expression for the decay rate for vesicles with charged bilayers should give better estimates for the correlation time of the shape fluctuations. (C) 2010 [doi: 10.1063/1.3361158]
 
Publisher AMER INST PHYSICS
 
Date 2011-07-16T13:11:46Z
2011-12-26T12:49:46Z
2011-12-27T05:35:29Z
2011-07-16T13:11:46Z
2011-12-26T12:49:46Z
2011-12-27T05:35:29Z
2010
 
Type Article
 
Identifier PHYSICS OF FLUIDS, 22(3), -
1070-6631
http://dx.doi.org/10.1063/1.3361158
http://dspace.library.iitb.ac.in/xmlui/handle/10054/4435
http://hdl.handle.net/10054/4435
 
Language en