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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Vol. 21, Iss. 3 — Mar. 1, 2004
  • pp: 605–616

Thermal-lensing measurement of particle thermophoresis in aqueous dispersions

Roberto Rusconi, Lucio Isa, and Roberto Piazza  »View Author Affiliations


JOSA B, Vol. 21, Issue 3, pp. 605-616 (2004)
http://dx.doi.org/10.1364/JOSAB.21.000605


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Abstract

We show that thermophoresis (particle drift driven by thermal gradients) in aqueous solutions can be measured by using an all-optical thermal-lensing setup, where a temperature gradient is set by a near-infrared laser beam with no need of light-absorbing dyes. After discussing the principles of the method, we study by numerical simulation the nature and extent of parasitic thermal-convection effects, and we describe an optical setup designed to limit them. We finally present preliminary results on thermophoresis in micellar solutions and colloidal dispersions.

© 2004 Optical Society of America

OCIS Codes
(000.6850) General : Thermodynamics
(160.6060) Materials : Solgel
(190.4870) Nonlinear optics : Photothermal effects
(220.4830) Optical design and fabrication : Systems design
(350.6830) Other areas of optics : Thermal lensing

Citation
Roberto Rusconi, Lucio Isa, and Roberto Piazza, "Thermal-lensing measurement of particle thermophoresis in aqueous dispersions," J. Opt. Soc. Am. B 21, 605-616 (2004)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-21-3-605

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