Soret effect and photochemical reaction in liquids with laser-induced local heating

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DOIResolve DOI: http://doi.org/10.1364/OE.19.004047
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TypeArticle
Journal titleOptics Express
ISSN1094-4087
Volume19
Issue5
Pages40474058; # of pages: 12
SubjectBiological applications; Diphenylcarbazide; Eosin Y; Laser induced; Local heating; Mass diffusion equation; Micellar solution; Optical technique; Refractive index gradients; Soret effects; Theoretical models; Time-dependent; Chromium; Chromium compounds; Heating; Photochemical reactions; Refractive index; Laser excitation
AbstractWe report a theoretical model and experimental results for laser-induced local heating in liquids, and propose a method to detect and quantify the contributions of photochemical and Soret effects in several different situations. The time-dependent thermal and mass diffusion equations in the presence and absence of laser excitation are solved. The two effects can produce similar transients for the laser-on refractive index gradient, but very different laser-off behavior. The Soret effect, also called thermal diffusion, and photochemical reaction contributions in photochemically reacting aqueous Cr(VI)-diphenylcarbazide, Eosin Y, and Eosin Y-doped micellar solutions, are decoupled in this work. The extensive use of lasers in various optical techniques suggests that the results may have significance extending from physical-chemical to biological applications. © 2011 Optical Society of America.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC); NRC Institute for Fuel Cell Innovation (IFCI-IIPC)
Peer reviewedYes
NPARC number21271195
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Record identifierbad15f47-6399-4e37-8c20-3bf182edf9f8
Record created2014-03-24
Record modified2016-05-09
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