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Dynamic light back-scattering with polarization gating and Fourier spatial filter for particle sizing in concentrated suspension

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Author(s): Yang Hui | Zheng Gang | Dai Shu-guang | Zhang Ren-jie | Mu Ping-an

Journal: Optica Applicata
ISSN 0078-5466

Volume: 40;
Issue: 4;
Start page: 819;
Date: 2010;
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Keywords: particle sizing | dynamic light scattering (DLS) | back-scattering | polarization gating | Fourier spatial filter

ABSTRACT
We present here a new dynamic light scattering method for investigating the particle size in concentrated suspension. By using the polarization gating and Fourier spatial filter, the optical thickness through the sample is reduced and the multiple scattered light is suppressed. The method is systematically tested using suspensions of latex spheres of 100 nm with a wide range of concentrations. Compared to the current common methods for nanoparticle sizing in concentrated suspension, it has the advantage of simple structure and it is easy to debug and maintain.
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