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Title: Role of local assembly in the hierarchical crystallization of associating colloidal hard hemispheres
Authors: Lei, Qun-li
Hadinoto, Kunn
Ni, Ran
Keywords: Crystallization
Excluded Volume Interaction
DRNTU::Engineering::Chemical engineering
Issue Date: 2017
Source: Lei, Q., Hadinoto, K., & Ni, R. (2017). Role of local assembly in the hierarchical crystallization of associating colloidal hard hemispheres. Physical Review Materials, 1(5), 052601(R)-. doi:10.1103/PhysRevMaterials.1.052601
Series/Report no.: Physical Review Materials
Abstract: Hierarchical self-assembly consisting of local associations of simple building blocks for the formation of complex structures widely exists in nature, while the essential role of local assembly remains unknown. In this work, by using computer simulations, we study a simple model system consisting of associating colloidal hemispheres crystallizing into face-centered-cubic crystals comprised of spherical dimers of hemispheres, focusing on the effect of dimer formation on the hierarchical crystallization. We found that besides assisting the crystal nucleation because of increasing the symmetry of building blocks, the association between hemispheres can also induce both reentrant melting and reentrant crystallization depending on the range of interaction. Especially when the interaction is highly sticky, we observe a novel reentrant crystallization of identical crystals, which melt only in a certain temperature range. This offers another axis in fabricating responsive crystalline materials by tuning the fluctuation of local association.
DOI: 10.1103/PhysRevMaterials.1.052601
Rights: © 2017 American Physical Society. All rights reserved. This paper was published in Physical Review Materials and is made available with permission of American Physical Society.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SCBE Journal Articles

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