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Layer with reduced viscosity at water-oil interfaces probed by fluorescence correlation spectroscopy
Journal article   Open access

Layer with reduced viscosity at water-oil interfaces probed by fluorescence correlation spectroscopy

Dapeng Wang, Leonid Pevzner, Chen Li, Kalina Peneva, Christopher Y Li, Derek Y C Chan, Klaus Müllen, Markus Mezger, Kaloian Koynov and Hans-Jürgen Butt
Physical review. E, Statistical, nonlinear, and soft matter physics, v 87(1), pp 012403-012403
Jan 2013
PMID: 23410340
url
https://doi.org/10.1103/PhysRevE.87.012403View
Published, Version of Record (VoR) Open

Abstract

Particle Size Viscosity Spectrometry, Fluorescence - methods Surface Properties Water - chemistry Oils - chemistry Diffusion Alkanes - chemistry
The two-dimensional diffusion of isolated molecular tracers at the water-n-alkane interface was studied with fluorescence correlation spectroscopy. The interfacial diffusion coefficients of larger tracers with a hydrodynamic radius of 4.0 nm agreed well with the values calculated from the macroscopic viscosities of the two bulk phases. However, for small molecule tracers with hydrodynamic radii of only 1.0 and 0.6 nm, notable deviations were observed, indicating the existence of an interfacial region with reduced effective viscosity and increased mobility.

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#6 Clean Water and Sanitation

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Collaboration types
Domestic collaboration
International collaboration
Web of Science research areas
Physics, Fluids & Plasmas
Physics, Mathematical
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