On the mechanism of transient bleaching of the optical absorption of ferrofluids and dyed liquids

被引：23

作者：

Hoffmann, B ^{[1
]}

Köhler, W ^{[1
]}

Krekhova, M ^{[1
]}

机构：

[1] Univ Bayreuth, Inst Phys, D-95440 Bayreuth, Germany

来源：

JOURNAL OF CHEMICAL PHYSICS | 2003年 / 118卷 / 07期

关键词：

D O I：

10.1063/1.1536954

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：

We have investigated the transient optical bleaching of two sterically stabilized kerosene based magnetite ferrofluids and of a dye solution (quinizarin in toluene). Master plots are constructed from model calculations of the initial rise of the transmitted intensity, which clearly prove that the bleaching is caused by a thermophoretic migration of the absorbers out of the laser beam. The quantitative model allows for the determination of the thermal diffusion coefficients of the two ferrofluids investigated to 0.4 and 1.7x10(-8) cm(2)(s K)(-1), which agrees well with the literature value for a similar system. (C) 2003 American Institute of Physics.

引用

页码：3237 / 3242

页数：6

共 21 条

[1] FORCED RAYLEIGH EXPERIMENT IN A MAGNETIC FLUID [J].