Simultaneous Analysis of Equilibrium Fluctuations at the Surface and in the Bulk of a Binary Liquid Mixture by Dynamic Light Scattering

Koller TM, Klein T, Chen J, Kalantar A, van der Laan GP, Rausch MH, Fröba AP (2017)


Publication Language: English

Publication Status: Published

Publication Type: Journal article, Original article

Publication year: 2017

Journal

Publisher: AMER CHEMICAL SOC

Book Volume: 121

Pages Range: 10950-10956

Journal Issue: 48

DOI: 10.1021/acs.jpcb.7b09770

Abstract

For the first time, we demonstrate that it is possible to simultaneously analyze microscopic fluctuations at the surface and in the bulk of a binary liquid mixture by dynamic light scattering in macroscopic thermodynamic equilibrium. For a model system containing n-octacosane and ethanol, three individual signals distinguishable in the time-resolved analysis of the scattered light intensity appear on different time scales. One oscillatory signal from surface fluctuations at the vapor liquid interface in the short time range and two exponential Rayleigh signals from fluctuations in temperature and concentration in the bulk of fluid in the long-time range could be associated with hydrodynamic modes. This microscopic information allows for a simultaneous determination of the macroscopic properties interfacial tension, kinematic viscosity, thermal diffusivity, and mutual diffusivity within a single experimental run. The presented approach represents a worthwhile strategy, for example, in the context of sensor development for an effective multiproperty determination of fluid systems.

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How to cite

APA:

Koller, T.M., Klein, T., Chen, J., Kalantar, A., van der Laan, G.P., Rausch, M.H., & Fröba, A.P. (2017). Simultaneous Analysis of Equilibrium Fluctuations at the Surface and in the Bulk of a Binary Liquid Mixture by Dynamic Light Scattering. Journal of Physical Chemistry B, 121(48), 10950-10956. https://doi.org/10.1021/acs.jpcb.7b09770

MLA:

Koller, Thomas Manfred, et al. "Simultaneous Analysis of Equilibrium Fluctuations at the Surface and in the Bulk of a Binary Liquid Mixture by Dynamic Light Scattering." Journal of Physical Chemistry B 121.48 (2017): 10950-10956.

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