Issue 10, 2010

Charged silica suspensions as model materials for liquids in confined geometries

Abstract

Combining computer simulations and experiments we investigate the role of particle charges on the layering behavior of confined silica colloids (slit-pore geometry). To this end we perform colloidal-probe atomic-force-microscope measurements of the oscillatory solvation force of confined suspensions involving three different particle sizes (and resulting total charges). For all systems, the wavelength of the oscillations as function of volume fraction is found to display a power-law behavior characterized by similar exponents. However, the results for different particle sizes cannot be simply mapped onto each other, which demonstrates the importance of correlation effects due to the different Coulomb coupling. Our experimental findings are consistent with the results from parallel Monte Carlo computer simulations of a (DLVO) model system.

Graphical abstract: Charged silica suspensions as model materials for liquids in confined geometries

Article information

Article type
Paper
Submitted
05 Jan 2010
Accepted
04 Mar 2010
First published
20 Apr 2010

Soft Matter, 2010,6, 2330-2336

Charged silica suspensions as model materials for liquids in confined geometries

S. H. L. Klapp, S. Grandner, Y. Zeng and R. von Klitzing, Soft Matter, 2010, 6, 2330 DOI: 10.1039/C000194P

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