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Hiester T, Dietrich S, Mecke K. Microscopic theory for interface fluctuations in binary liquid mixtures. J Chem Phys. 2006;125(18):184701doi: 10.1063/1.2358341.
Hiester, T., Dietrich, S., & Mecke, K. (2006). Microscopic theory for interface fluctuations in binary liquid mixtures. The Journal of chemical physics, 125(18), 184701. https://doi.org/10.1063/1.2358341
Hiester, Thorsten, et al. "Microscopic theory for interface fluctuations in binary liquid mixtures." The Journal of chemical physics vol. 125,18 (2006): 184701. doi: https://doi.org/10.1063/1.2358341
Hiester T, Dietrich S, Mecke K. Microscopic theory for interface fluctuations in binary liquid mixtures. J Chem Phys. 2006 Nov 14;125(18):184701. doi: 10.1063/1.2358341. PMID: 17115773.
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J Chem Phys. 2006 Nov 14;125(18):184701. doi: 10.1063/1.2358341.

Microscopic theory for interface fluctuations in binary liquid mixtures.

The Journal of chemical physics

Thorsten Hiester, S Dietrich, Klaus Mecke

Affiliations

  1. Institut für Theoretische Physik, Universität Erlangen-Nürnberg, Staudtstrase 7, D-91058 Erlangen, Germany. [email protected]

PMID: 17115773 DOI: 10.1063/1.2358341

Abstract

Thermally excited capillary waves at fluid interfaces in binary liquid mixtures exhibit simultaneously both density and composition fluctuations. Based on a density functional theory for inhomogeneous binary liquid mixtures we derive an effective wavelength dependent Hamiltonian for fluid interfaces in these systems beyond the standard capillary-wave model. Explicit expressions are obtained for the surface tension, the bending rigidities, and the coupling constants of compositional capillary waves in terms of the profiles of the two number densities characterizing the mixture. These results lead to predictions for grazing-incidence x-ray scattering experiments at such interfaces.

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