Nonlinear light scattering from clusters and single particles

被引：39

作者：

Dadap, Jerry I. ^{[1
]}

de Aguiar, Hilton B. ^{[2
]}

Roke, Sylvie ^{[2
]}

机构：

[1] Columbia Univ, Dept Appl Phys & Appl Math, New York, NY 10027 USA

[2] Max Planck Inst Met Res, D-70569 Stuttgart, Germany

来源：

JOURNAL OF CHEMICAL PHYSICS | 2009年 / 130卷 / 21期

关键词：

colloids; fluctuations; light scattering; spectral line intensity; surface dynamics; HYPER-RAYLEIGH SCATTERING; OPTICAL 2ND-HARMONIC GENERATION; SUM-FREQUENCY GENERATION; SPHERICAL-PARTICLES; VIBRATIONAL SPECTROSCOPY; CENTROSYMMETRIC MATERIAL; MULTIPOLAR CONTRIBUTIONS; COLLOIDAL DISPERSIONS; SILICA DISPERSIONS; LIQUID INTERFACES;

D O I：

10.1063/1.3141383

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 present sum-frequency-scattering experiments on colloidal dispersions with various concentrations and in different scattering geometries. At small scattering angles, large fluctuations are observed in the intensity of the scattered sum-frequency photons. By considering the angular dependence of the signal, the particle concentration dependence, and the surface vibrational spectra of the particle, we have determined that the fluctuations are caused by scattering from clusters of particles. We further demonstrate that dynamic nonlinear light scattering may be used to measure the size of the correlated particle clusters.

引用

页数：7

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