Electrostatic Stretching of a Charged Vesicleстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
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Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:We present a closed-form solution of electrostatic potential self-induced by a uniformly charged micro/nanovesicle
and the corresponding elastic deformation of the vesicle membrane due to Maxwell stress. At equilibrium, the electrostatic
force induced on both sides of the membrane is balanced by the elastic force of the stretched membrane. We develop
differential and integral solutions of the coupled Poisson-Boltzmann system for a spherical vesicle and demonstrate
that the integral solution is relatively flexible in formulating asymmetric configurations. Analytical results are formulated
in terms of vesicle size, Debye length, and the surface charge density. The membrane stretching is characterized by
the dimensionless group that defines the relative strength of the net electric force with respect to the membrane
stiffness. We found that the self-induced electrostatic interaction will lead to a pre-stressed membrane although the
small displacement is often negligible compared with the vesicle size. Quantitative analysis also reveals that the electric
force can assist the vesicle in recovering its opening pore.