ATTRACTIVE POTENTIAL BETWEEN CONFINED COLLOIDS AT LOW IONIC-STRENGTH

被引：309
作者：
KEPLER, GM
FRADEN, S
机构：
[1] Martin Fisher School of Physics, Brandeis University, Waltham
来源：
PHYSICAL REVIEW LETTERS | 1994年 / 73卷 / 02期
关键词：
D O I：
10.1103/PhysRevLett.73.356
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Digital video microscopy is used to locate the positions of 1.27 mum diameter polystyrene spheres suspended in low ionic strength water and confined between two glass plates. A method is developed to obtain the pair potential of the colloidal particles from measurements of the pair-correlation function of both dilute and moderately concentrated dispersions. We find that the measured pair potential has an attractive component much greater than predicted by the Derjaguin-Landau-Verwey-Overbeek theory of nonconfined colloids and suggest that the confining plates are responsible for the observed deviations from theory.
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页码：356 / 359
页数：4
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