Papers & References

Electrostatic Interactions of Colloidal Particles in Nonpolar Solvents: Role of Surface Chemistry and Charge Control Agents

Discontinued Devices LC-R 2500 Spatial Light Modulators
Microscopy
Published on:
Authors: Sunil K. Sainis, Vincent Germain, Cecile O. Mejean, and Eric R. Dufresne
Abstract:

“We study the electrostatic and hydrodynamic interactions of colloidal particles in nonpolar solvents. Using blinking optical tweezers, we can extract the screening length, K-1, the effective surface potential, |eζ*|, and the hydrodynamic radius, ah, in a single measurement. We apply this technique to suspensions of polystyrene and poly(methyl methacrylate) particles in hexadecane with soluble charge control agents, aerosol sodium di-2-ethylhexylsulfosuccinate (AOT) and polyisobutylene succinimide (OLOA-1200). We find that the electrostatic interactions of these particles depend sensitively on surface composition as well as on the concentration and chemistry of the charge control agent.”

Restricted Access

Publication: Langmuir
Issue/Year: Langmuir, 2008, 24 (4), pp 1160–1164
DOI: 10.1021/la702432u
Link: https://doi.org/10.1021/la702432u
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