Thermodiffusion of charged micelles
Langue
en
Article de revue
Ce document a été publié dans
Physical Review Letters. 2005-11-07, vol. 95, n° 20, p. 208301 (1-4)
American Physical Society
Résumé en anglais
We study diffusion of charged nanoparticles in a temperature gradient and derive the corresponding Ludwig-Soret transport coefficient. Charge effects are found to enhance thermodiffusion by up to 2 orders of magnitude. We ...Lire la suite >
We study diffusion of charged nanoparticles in a temperature gradient and derive the corresponding Ludwig-Soret transport coefficient. Charge effects are found to enhance thermodiffusion by up to 2 orders of magnitude. We show that the inverse Soret coefficient 1/ST is a linear function of the colloid density n; the proportionality factor, or second virial coefficient, varies algebraically with inverse salinity, n0-α; the precise value of the exponent α depends on the ratio of particle size and Debye length. Our findings compare favorably with experimental observations and provide, without adjustable parameters, a good fit to the data on 3-nm sodium dodecylsulfate micelles.< Réduire
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