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

Beitrag in einer Fachzeitschrift
(Originalarbeit)


Details zur Publikation

Autor(en): Koller TM, Klein T, Chen J, Kalantar A, van der Laan GP, Rausch MH, Fröba AP
Zeitschrift: Journal of Physical Chemistry B
Verlag: AMER CHEMICAL SOC
Jahr der Veröffentlichung: 2017
Band: 121
Heftnummer: 48
Seitenbereich: 10950-10956
ISSN: 1520-6106
eISSN: 1520-5207
Sprache: Englisch


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.


FAU-Autoren / FAU-Herausgeber

Fröba, Andreas Paul Prof. Dr.-Ing.
Koller, Thomas Manfred Dr.-Ing.
Lehrstuhl für Advanced Optical Technologies - Thermophysical Properties
Klein, Tobias
Lehrstuhl für Advanced Optical Technologies - Thermophysical Properties
Lehrstuhl für Advanced Optical Technologies - Thermophysical Properties
Rausch, Michael Heinrich Dr.-Ing.
Lehrstuhl für Advanced Optical Technologies - Thermophysical Properties


Zusätzliche Organisationseinheit(en)
Erlangen Graduate School in Advanced Optical Technologies


Autor(en) der externen Einrichtung(en)
Shell Global Solutions International B.V.


Zitierweisen

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://dx.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.

BibTeX: 

Zuletzt aktualisiert 2018-23-07 um 03:10