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Yu. B. BORKOVSKAYA, V. N. SHILOV, and N. P. BONDARENKO
«Influence of Weak Inhomogeneity of a Bulk Charge in a Pore Space of Nanosuspensions on Electroacoustic Effect»
395–409 (2008)

PACS numbers: 43.35.+d, 72.50.+b, 82.45.-h, 82.70.Kj, 82.80.Bg

This paper is concerned with the widening of the field of parameters, for which the analytical description of electroacoustic phenomena in concentrated nanosuspensions is possible. In such suspensions, particle sizes and interparticle distances are comparable or even smaller than the thickness of double electrical layer (DEL), and hence extensively used approximation of thin DEL is not applicable. This paper is an extension of our previous paper [1] where the expression for colloid vibration current was obtained within the approximation of strong overlap of DELs of neighbouring particles (quasihomogeneous approximation). We obtain the correction to colloid vibration current within the linear approximation by small parameter, which is equal to the ratio of interparticle distance for neighbouring particles to the thickness of DEL. This enables us to describe an influence of bulk charge heterogeneity in suspension porous space on electroacoustic phenomena and to estimate the ranges of the applicability of quasi-homogeneous approximation.