Distinguishing Between Spherical and Nonspherical Particles by Measuring the Variability in Azimuthal Light Scattering

Azimuthal variabilities in scattering of monochromatic, circularly polarized light by individual spherical and nonspherical particles were measured using the DAWN-A (Wyatt et al. Appl. Opt. 27:2405-2421, 1988) differential light scattering detector. Measured aerosols included polystyrene latex spher...

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Bibliographic Details
Published inAerosol science and technology Vol. 23; no. 3; pp. 373 - 391
Main Authors Sachweh, Bernd A., Dick, William D., McMurry, Peter H.
Format Journal Article
LanguageEnglish
Published London Taylor & Francis Group 1995
Taylor & Francis
Subjects
Chemistry
Colloidal state and disperse state
Exact sciences and technology
General and physical chemistry
General, apparatus, technics of preparation
Light scattering
Aerosols
Non spherical particle
Measurement method
Spherical particle
Experimental study
Azimuthal field
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Summary:Azimuthal variabilities in scattering of monochromatic, circularly polarized light by individual spherical and nonspherical particles were measured using the DAWN-A (Wyatt et al. Appl. Opt. 27:2405-2421, 1988) differential light scattering detector. Measured aerosols included polystyrene latex spheres (PSL), quartz, and sodium chloride particles of 0.576, 0.741, 0.966, and 1.250 μm diameter. Signals from eight detectors at different azimuthal angles at a polar angle of 55° showed that variabilities for nonspherical particles significantly exceeded values for the spherical PSL. The probability that a quartz or sodium chloride particle would be incorrectly identified as a sphere are less than about 5% for all sizes investigated.
ISSN:0278-6826
1521-7388
DOI:10.1080/02786829508965321