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Issue 35, 2014
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Anomalous long-range repulsion between silica surfaces induced by density inhomogeneities in supercritical ethanol

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Abstract

Anomalous long-range repulsion, extending over several micrometres, emerged between silica surfaces around the ridge of density fluctuations in supercritical ethanol at temperatures and pressures near the gas/liquid critical point (Tc = 241 °C, Pc = 6.14 MPa). Analysis shows that augmentation of ethanol density around silica surfaces in the presence of density fluctuations facilitates dissociation of silanol groups, leading to long-range electrostatic repulsion in the nonpolar medium.

Graphical abstract: Anomalous long-range repulsion between silica surfaces induced by density inhomogeneities in supercritical ethanol

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Article information


Submitted
11 Apr 2014
Accepted
16 Jun 2014
First published
16 Jun 2014

Soft Matter, 2014,10, 6645-6650
Article type
Paper
Author version available

Anomalous long-range repulsion between silica surfaces induced by density inhomogeneities in supercritical ethanol

S. Mukai, T. Koyama, K. Tsujii and S. Deguchi, Soft Matter, 2014, 10, 6645
DOI: 10.1039/C4SM00787E

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