Kinetics of colloidal fractal aggregation by differential dynamic microscopy

被引：32

作者：

Ferri, F. ^{[1
]}

D'Angelo, A. ^{[1
]}

Lee, M. ^{[2
]}

Lotti, A. ^{[1
,3
]}

Pigazzini, M. C. ^{[1
]}

Singh, K. ^{[4
]}

Cerbino, R. ^{[5
]}

机构：

[1] Univ Insubria, Dipartimento Fis & Matemat, I-22100 Como, Italy

[2] Univ Glasgow, Sch Phys & Astron, Glasgow G12 8QQ, Lanark, Scotland

[3] Ecole Polytech, CNRS, Ctr Phys Theor, F-91128 Palaiseau, France

[4] Inst Natl Rech Sci Energie Mat & Telecommun, Varennes, PQ J3X 1S2, Canada

[5] Univ Milan, Dipartimento Chim Biochim & Biotecnol Med, I-20090 Segrate, Italy

来源：

EUROPEAN PHYSICAL JOURNAL-SPECIAL TOPICS | 2011年 / 199卷 / 01期

关键词：

LIGHT-SCATTERING;

D O I：

10.1140/epjst/e2011-01509-9

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study the kinetics of an aggregation process induced by adding salt to a stable colloidal suspension of 73 nm (diameter) particles. Despite the subdiffraction size of the colloidal particles, the process is monitored via optical microscopy, which is used here to obtain time-resolved scattering information about the colloidal aggregates. The radius of the aggregates is determined as a function of time and their fractal dimension is extracted. Our results are compatible with a diffusion limited aggregation process, as independently confirmed by spectral turbidimetry measurements on the same sample.

引用

页码：139 / 148

页数：10

共 21 条

[1] COAGULATION KINETICS AND AGGREGATE MORPHOLOGY IN THE INTERMEDIATE REGIMES BETWEEN DIFFUSION-LIMITED AND REACTION-LIMITED CLUSTER AGGREGATION [J].