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Materials 2017, 10(4), 361;

Assembly of One-Patch Colloids into Clusters via Emulsion Droplet Evaporation

Theoretische Physik II, Physikalisches Institut, Universität Bayreuth, Universitätsstraße 30, D-95440 Bayreuth, Germany
Department of Physics, Hanoi National University of Education, 136 Xuanthuy, Hanoi 100000, Vietnam
Department of Physics, University of Surrey, Guildford GU2 7XH, UK
Author to whom correspondence should be addressed.
Received: 23 February 2017 / Revised: 24 March 2017 / Accepted: 27 March 2017 / Published: 29 March 2017
(This article belongs to the Special Issue Designed Colloidal Self-Assembly)
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We study the cluster structures of one-patch colloidal particles generated by droplet evaporation using Monte Carlo simulations. The addition of anisotropic patch–patch interaction between the colloids produces different cluster configurations. We find a well-defined category of sphere packing structures that minimize the second moment of mass distribution when the attractive surface coverage of the colloids χ is larger than 0 . 3 . For χ < 0 . 3 , the uniqueness of the packing structures is lost, and several different isomers are found. A further decrease of χ below 0 . 2 leads to formation of many isomeric structures with less dense packings. Our results could provide an explanation of the occurrence of uncommon cluster configurations in the literature observed experimentally through evaporation-driven assembly. View Full-Text
Keywords: one-patch colloid; Janus colloid; cluster; emulsion-assisted assembly; Pickering effect one-patch colloid; Janus colloid; cluster; emulsion-assisted assembly; Pickering effect

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Van, H.P.; Fortini, A.; Schmidt, M. Assembly of One-Patch Colloids into Clusters via Emulsion Droplet Evaporation. Materials 2017, 10, 361.

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