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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 43, Iss. 17 — Jun. 10, 2004
  • pp: 3382–3390

Proposal and testing of dual-beam dynamic light scattering for two-particle microrheology

Xin-Liang Qiu, Penger Tong, and Bruce J. Ackerson  »View Author Affiliations


Applied Optics, Vol. 43, Issue 17, pp. 3382-3390 (2004)
http://dx.doi.org/10.1364/AO.43.003382


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Abstract

A dual-beam dynamic light-scattering arrangement is devised to measure the time-dependent mean squared relative displacement of a pair of tracer particles with a small separation of micrometers. The technique is tested by the measurement of the relative diffusion of polymer latex spheres suspended in a simple viscous fluid. The experiment verifies the theory and demonstrates its applications. The dual-beam dynamic light-scattering technique, when combined with an optical microscope, provides a powerful tool for the study of two-particle microrheology of soft materials. The advantages of the new technique are its high statistical accuracy, faster temporal response, and ease of use.

© 2004 Optical Society of America

OCIS Codes
(120.5820) Instrumentation, measurement, and metrology : Scattering measurements
(290.5850) Scattering : Scattering, particles
(300.6480) Spectroscopy : Spectroscopy, speckle

History
Original Manuscript: July 15, 2003
Revised Manuscript: February 26, 2004
Published: June 10, 2004

Citation
Xin-Liang Qiu, Penger Tong, and Bruce J. Ackerson, "Proposal and testing of dual-beam dynamic light scattering for two-particle microrheology," Appl. Opt. 43, 3382-3390 (2004)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-43-17-3382


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