Charge heteroaggregation between hard and soft particles -: art. no. 011509

被引:0
作者
Fernández-Barbero, A
Vincent, B
机构
[1] Univ Almeria, Dept Appl Phys, Complex Fluid Phys Grp, Canada San Urbano S-N, E-04120 Almeria, Spain
[2] Univ Bristol, Sch Chem, Bristol BS8 1TS, Avon, England
来源
PHYSICAL REVIEW E | 2001年 / 63卷 / 01期
关键词
D O I
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中图分类号
O35 [流体力学]; O53 [等离子体物理学];
学科分类号
070204 ; 080103 ; 080704 ;
摘要
In this paper, the heteroaggregation of opposite sign hard and soft colloidal particles has: been studied by static and dynamic light scattering. The structure of the aggregates, as well as the aggregation kinetics, have been investigated. At low electrolyte concentration, where both long-range electrostatic repulsive and attractive forces are present, the aggregates were found to be more open than expected for diffusion-limited cluster aggregation (DLCA). However, the aggregate size time evolution is characteristic of diffusion-controlled processes. At high electrolyte concentration, where DLCA would be expected, very compacted clusters were found, as well as very rapid aggregation, leading to high polydispersity. These latter findings are interpreted in terms of the differences in the homoaggregation speeds Tol the hard and soft particles.
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页数:7
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