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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics


  • Editor: Gregory W. Faris
  • Vol. 3, Iss. 4 — Apr. 23, 2008

Dynamics of interacting Brownian particles in concentrated colloidal suspensions

Hui Xia, Katsuhiro Ishii, Toshiaki Iwaii, Hongjian Li, and Bingchu Yang  »View Author Affiliations

Applied Optics, Vol. 47, Issue 9, pp. 1257-1262 (2008)

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We are concerned with dynamic properties of interacting Brownian particles in concentrated colloidal suspensions. An effective diffusion coefficient measured by the modulated in phase low-coherence dynamic light scattering technique is investigated as a function of the volume fraction. The experimental results are compared with the numerical ones calculated under both the Cohen–de Schepper approximation for hydrodynamic interaction and the Percus–Yevick approximations for structural effect. It is confirmed that the Brownian motion of particles in the range of volume fraction from 0.01 to 0.2 is mainly dominated by the hydrodynamic interaction rather than the structural effect, which can be described well by the Cohen–de Schepper approximation.

© 2008 Optical Society of America

OCIS Codes
(290.1350) Scattering : Backscattering
(290.5820) Scattering : Scattering measurements
(290.5850) Scattering : Scattering, particles
(290.7050) Scattering : Turbid media

ToC Category:

Original Manuscript: October 15, 2007
Revised Manuscript: January 21, 2008
Manuscript Accepted: January 25, 2008
Published: March 18, 2008

Virtual Issues
Vol. 3, Iss. 4 Virtual Journal for Biomedical Optics

Hui Xia, Katsuhiro Ishii, Toshiaki Iwaii, Hongjian Li, and Bingchu Yang, "Dynamics of interacting Brownian particles in concentrated colloidal suspensions," Appl. Opt. 47, 1257-1262 (2008)

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