Structure factor of charged colloidal suspensions using Brownian-dynamics simulation: comparison of Yukawa and Sogami pair potentials

Tata, B. V. R. ; Sood, A. K. ; Kesavamoorthy, R. (1990) Structure factor of charged colloidal suspensions using Brownian-dynamics simulation: comparison of Yukawa and Sogami pair potentials Pramana - Journal of Physics, 34 (1). pp. 23-31. ISSN 0304-4289

[img]
Preview
PDF - Publisher Version
719kB

Official URL: http://www.ias.ac.in/j_archive/pramana/34/1/23-32/...

Related URL: http://dx.doi.org/10.1007/BF02846106

Abstract

Static structure factors S(Q) are obtained for dilute charged colloidal systems using Brownian dynamics simulation method for the widely used screened Coulomb repulsive Yukawa potential and the recently proposed Sogami pair potential. The latter potential has, in addition to the usual repulsive part, an attractive term which is necessary to understand the reentrant phase transition reported in these colloids. It is shown for the first time that S(Q) obtained using the Sogami potential for parameters favourable for liquid-like order agrees well with that measured experimentally. Thus it appears that the Sogami potential explains features of a homogeneous liquid as well as phase separated states, whereas Yukawa potential does not.

Item Type:Article
Source:Copyright of this article belongs to Indian Academy of Sciences.
Keywords:Computer Simulation; Structure Factor; Colloids
ID Code:50301
Deposited On:22 Jul 2011 13:42
Last Modified:18 May 2016 04:39

Repository Staff Only: item control page