title: 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.
authors.affiliation: Institute for Theoretical Physics, Center for Extreme Matter and Emergent Phenomena, Utrecht University, Princetonplein 5, 3584 CC Utrecht, The Netherlands. j.c.everts@uu.nl.
authors.forename: J C
authors.initials: JC
authors.lastname: Everts
authors.forename: M N
authors.initials: MN
authors.lastname: van der Linden
authors.forename: A
authors.initials: A
authors.lastname: van Blaaderen
authors.forename: R
authors.initials: R
authors.lastname: van Roij