Issue 31, 2016

Alternating strings and clusters in suspensions of charged colloids

Abstract

We report the formation of alternating strings and clusters in a binary suspension of repulsive charged colloids with double layers larger than the particle size. Within a binary cell model we include many-body and charge-regulation effects under the assumption of a constant surface potential, and consider their repercussions on the two-particle interaction potential. We find that the formation of induced dipoles close to a charge-reversed state may explain the formation of these structures. Finally, we will touch upon the formation of dumbbells and small clusters in a one-component system, where the effective electrostatic interaction is always repulsive.

Graphical abstract: Alternating strings and clusters in suspensions of charged colloids

Supplementary files

Article information

Article type
Paper
Submitted
03 Jun 2016
Accepted
13 Jul 2016
First published
14 Jul 2016

Soft Matter, 2016,12, 6610-6620

Alternating strings and clusters in suspensions of charged colloids

J. C. Everts, M. N. van der Linden, A. van Blaaderen and R. van Roij, Soft Matter, 2016, 12, 6610 DOI: 10.1039/C6SM01283C

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