A thermal lens model including the Soret effect

In this letter we generalize the thermal lens model to account for the Soret effect in binary liquid mixtures. This formalism permits the precise determination of the Soret coefficient in a steady-state situation. The theory is experimentally verified using the measured values in the ethanol/water m...

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Bibliographic Details
Published in:Applied physics letters 2009-02, Vol.94 (5), p.051103-051103-3
Main Authors: Cabrera, Humberto, Sira, Eloy, Rahn, Kareem, García-Sucre, Máximo
Format: Article
Language:English
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Summary:In this letter we generalize the thermal lens model to account for the Soret effect in binary liquid mixtures. This formalism permits the precise determination of the Soret coefficient in a steady-state situation. The theory is experimentally verified using the measured values in the ethanol/water mixtures. The time evolution of the Soret signal has been used to derive mass-diffusion times from which mass-diffusion coefficients were calculated.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.3078287