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Proceedings Paper

Study of thermo-optical properties or surfactants in aqueous solution by interferometry
Author(s): M. Di Lorenzo; Rafael A. Escalona Z.
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Paper Abstract

Although a variety of surfactant based processes of technological importance occur in the presence of temperature gradients, very little information is available on the thermal diffusion of these macromolecules in solution. In this work optical interferometry is applied to the study of photothermal properties of aqueous solutions of surfactants. This technique allows to visualize spatio-temporal changes of the refractive index of the samples produced by the local heating of the solvent and the solute redistribution set up by thermal diffusion. We present preliminary results on the photothermal response to absorption of cw laser radiation of aqueous solutions of ionic and nonionic surfactants in the presence of trace amounts of the malaquite green dye.

Paper Details

Date Published: 21 October 2004
PDF: 5 pages
Proc. SPIE 5622, 5th Iberoamerican Meeting on Optics and 8th Latin American Meeting on Optics, Lasers, and Their Applications, (21 October 2004); doi: 10.1117/12.590803
Show Author Affiliations
M. Di Lorenzo, Univ. Simon Bolivar (Venezuela)
Rafael A. Escalona Z., Univ. Simon Bolivar (Venezuela)


Published in SPIE Proceedings Vol. 5622:
5th Iberoamerican Meeting on Optics and 8th Latin American Meeting on Optics, Lasers, and Their Applications
Aristides Marcano O.; Jose Luis Paz, Editor(s)

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