Cluster formation in two-Yukawa fluids

被引：175

作者：

Liu, Y ^{[1
]}

Chen, WR ^{[1
]}

Chen, SH ^{[1
]}

机构：

[1] MIT, Dept Nucl Engn, Cambridge, MA 02139 USA

来源：

JOURNAL OF CHEMICAL PHYSICS | 2005年 / 122卷 / 04期

关键词：

D O I：

10.1063/1.1830433

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We present a different and efficient method for implementing the analytical solution of Ornstein-Zernike equation for two-Yukawa fluids in the mean spherical approximation. We investigate, in particular, the conditions for the formation of an extra low-Q peak in the structure factor, which we interpret as due to cluster formation in the two-Yukawa fluid when the interparticle potential is composed of a short-range attraction and a long-range repulsion. We then apply this model to interpret the small angle neutron scattering data for protein solutions at moderate concentrations and find out that the presence of a peak centered at Q = 0 (zero-Q peak) besides the regular interaction peak due to charged proteins implies an existence of long-range attractive interactions besides the charge repulsion. (C) 2005 American Institute of Physics.

引用

页数：13

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