LONG-TIME SELF-DIFFUSION OF SPHERICAL COLLOIDAL PARTICLES MEASURED WITH FLUORESCENCE RECOVERY AFTER PHOTOBLEACHING

被引：166

作者：

VANBLAADEREN, A ^{[1
]}

PEETERMANS, J ^{[1
]}

MARET, G ^{[1
]}

DHONT, JKG ^{[1
]}

机构：

[1] MAX PLANCK INST FESTKORPERFORSCH,HOCHFELD MAGNETLAB,F-38042 GRENOBLE,FRANCE

来源：

JOURNAL OF CHEMICAL PHYSICS | 1992年 / 96卷 / 06期

关键词：

D O I：

10.1063/1.462795

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：

Long-time self-diffusion coefficients in concentrated colloidal dispersions of silica spheres, with various interaction potentials, were measured with the fluorescence recovery after photobleaching technique. Charge stabilized spheres were measured in solutions of LiCl in dimethylformamide with varying ionic strength. Sterically stabilized hard-sphere-like stearyl silica dispersions were studied in cyclohexane. The fluorophore used, fluoresceinisothiocyanate, was covalently attached to the surface of the spheres (for the charged particles) or buried inside the silica core (for the hard spheres). The particles were characterized by electrophoresis, static and dynamic light scattering, and transmission electron microscopy. The experimental results are discussed and compared with existing theories on long-time self-diffusion.

引用

页码：4591 / 4603

页数：13

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