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


ABSTRACT: 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.

SUBMITTER: Van HP 

PROVIDER: S-EPMC5506900 | biostudies-other | 2017 Mar

REPOSITORIES: biostudies-other

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