Interactions of neutral semipermeable shells in asymmetric electrolyte solutionsстатья
Статья опубликована в высокорейтинговом журнале
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:We study the ionic equilibria and interactions of neutral semi-permeable spherical shells immersed in
electrolyte solutions, including polyions. Although the shells are uncharged, only one type of ion of the
electrolyte can permeate them, thus leading to a steric charge separation in the system. This gives rise to
a charge accumulation inside the shell and a build up of concentration-dependent shell potential, which
converts into a disjoining pressure between the neighboring shells. These are quantified using the
Poisson–Boltzmann and integral equations theories. In particular, we show that in a case of low valency
electrolytes, interactions between shells are repulsive and can be sufficiently strong to stabilize the shell
dispersion. In contrast, the charge correlation effects in solutions of polyvalent ions result in attractions
between the shells, with can lead to their aggregation.