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Related Experiment Video

Updated: Jul 9, 2026

Measurement of Particle Size Distribution in Turbid Solutions by Dynamic Light Scattering Microscopy
09:16

Measurement of Particle Size Distribution in Turbid Solutions by Dynamic Light Scattering Microscopy

Published on: January 9, 2017

Scattering from particles on surfaces: visibility factor and polydispersity.

J L de la Peña, J M Saiz, G Videen

    Optics Letters
    |December 15, 2007
    PubMed
    Summary

    A new method uses light-scattering minima visibility to determine contaminant size and polydispersity on surfaces. This technique accurately measures particle size distribution and radial variations for fibers and spheres.

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    Area of Science:

    • Surface science
    • Optical physics
    • Materials characterization

    Background:

    • Characterizing contaminants on flat substrates is crucial for quality control and research.
    • Existing methods may lack precision or require complex sample preparation.

    Purpose of the Study:

    • To develop and validate a novel experimental method for determining size-polydispersity of surface contaminants.
    • To apply the method for analyzing both fibers and spherical particles on a substrate.

    Main Methods:

    • Utilizing the visibility factor of light-scattering minima.
    • Employing double-interaction-model calculations for verification.
    • Experimentally examining radial variations and size polydispersity.

    Main Results:

    • Successfully obtained size-polydispersity information from contaminants.
    • Verified the method's accuracy through theoretical calculations.
    • Demonstrated the technique's applicability to micrometer-sized fibers and spherical particles.

    Conclusions:

    • The developed light-scattering method provides a reliable way to assess contaminant size and polydispersity.
    • This technique offers a valuable tool for surface analysis and quality control.