TIME-DEPENDENT POLYDISPERSITY OF GROWING COLLOIDAL AGGREGATES - PREDICTIONS FROM DYNAMIC LIGHT-SCATTERING THEORY

被引：34

作者：

GRIFFIN, WG ^{[1
]}

GRIFFIN, MCA ^{[1
]}

机构：

[1] XAAR LTD,CAMBRIDGE CB4 4FD,ENGLAND

来源：

JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS | 1993年 / 89卷 / 15期

关键词：

D O I：

10.1039/ft9938902879

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：

A theory is presented for the variation of the polydispersity index measured in a dynamic light scattering experiment performed on a suspension of aggregating colloidal particles. The analytical forms of this index, calculated by cumulants analysis, are described for various models of colloidal aggregation and numerical data is presented showing the dependence of the index, which contains contributions from the dynamics of internal aggregate motions, on aggregate size and shape for aggregates of different fractal structure. The value of this dynamic optical index as a diagnostic for aggregation pattern is discussed and the analysis is applied to the results of a light scattering study of the heat-induced aggregation of a globular protein.

引用

页码：2879 / 2889

页数：11