## Novel kinetic trapping in charged colloidal clusters due to self-induced surface charge organization

2013
##### Authors
Murata, Ken-ichiro
Tanaka, Hajime
Williams, Stephen R.
Malins, Alex
Royall, C. Patrick
Journal article
Published
##### Published in
Scientific Reports ; 3 (2013). - 2072. - eISSN 2045-2322
##### Abstract
Colloidal clusters are an unusual state of matter where tunable interactions enable a sufficient reduction in their degrees of freedom that their energy landscapes can become tractable — they form a playground for statistical mechanics and promise unprecedented control of structure on the submicron lengthscale. We study colloidal clusters in a system where a short-ranged polymer-induced attraction drives clustering, while a weak, long-ranged electrostatic repulsion prevents extensive aggregation. We compare experimental yields of cluster structures with theory which assumes simple addition of competing isotropic interactions between the colloids. Here we show that for clusters of size 4 ≤ m ≤ 7, the yield of minimum energy clusters is much less than expected. We attribute this to an anisotropic self-organized surface charge distribution which leads to unexpected kinetic trapping. We introduce a model for the coupling between counterions and binding sites on the colloid surface with which we interpret our findings.
530 Physics
##### Cite This
ISO 690KLIX, Christian L., Ken-ichiro MURATA, Hajime TANAKA, Stephen R. WILLIAMS, Alex MALINS, C. Patrick ROYALL, 2013. Novel kinetic trapping in charged colloidal clusters due to self-induced surface charge organization. In: Scientific Reports. 3, 2072. eISSN 2045-2322. Available under: doi: 10.1038/srep02072
BibTex
@article{Klix2013Novel-43010,
year={2013},
doi={10.1038/srep02072},
title={Novel kinetic trapping in charged colloidal clusters due to self-induced surface charge organization},
volume={3},
journal={Scientific Reports},
author={Klix, Christian L. and Murata, Ken-ichiro and Tanaka, Hajime and Williams, Stephen R. and Malins, Alex and Royall, C. Patrick},
note={Article Number: 2072}
}

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Yes
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