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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics

| EXPLORING THE INTERFACE OF LIGHT AND BIOMEDICINE

  • Editors: Andrew Dunn and Anthony Durkin
  • Vol. 7, Iss. 3 — Feb. 29, 2012

Analysis of molecular dynamics of colloidal particles in transported dilute samples by self-mixing laser Doppler velocimetry

Seiichi Sudo, Takayuki Ohtomo, Masao Iwamatsu, Tuyoshi Osada, and Kenju Otsuka  »View Author Affiliations


Applied Optics, Vol. 51, Issue 3, pp. 370-377 (2012)
http://dx.doi.org/10.1364/AO.51.000370


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Abstract

Colloidal particles in a liquid medium are transported with constant velocity, and dynamic light scattering experiments are performed on the samples by self-mixing laser Doppler velocimetry. The power spectrum of the modulated wave induced by the motion of the colloidal particles cannot be described by the well-known formula for flowing Brownian motion systems, i.e., a combination of Doppler shift, diffusion, and translation. Rather, the power spectrum was found to be described by the q-Gaussian distribution function. The molecular mechanism resulting in this anomalous line shape of the power spectrum is attributed to the anomalous molecular dynamics of colloidal particles in transported dilute samples, which satisfy a nonlinear Langevin equation.

© 2012 Optical Society of America

OCIS Codes
(000.2690) General : General physics
(280.3340) Remote sensing and sensors : Laser Doppler velocimetry
(290.5840) Scattering : Scattering, molecules
(280.4788) Remote sensing and sensors : Optical sensing and sensors

ToC Category:
Scattering

History
Original Manuscript: July 21, 2011
Revised Manuscript: October 7, 2011
Manuscript Accepted: October 11, 2011
Published: January 20, 2012

Virtual Issues
Vol. 7, Iss. 3 Virtual Journal for Biomedical Optics

Citation
Seiichi Sudo, Takayuki Ohtomo, Masao Iwamatsu, Tuyoshi Osada, and Kenju Otsuka, "Analysis of molecular dynamics of colloidal particles in transported dilute samples by self-mixing laser Doppler velocimetry," Appl. Opt. 51, 370-377 (2012)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=ao-51-3-370

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