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Domain and stripe formation between hexagonal and square ordered fillings of colloidal particles on periodic pinning substrates

McDermott, Danielle and Amelang, Jeff and Lopatina, Lena M. and Olson Reichhardt, Cynthia J. and Reichhardt, Charles (2013) Domain and stripe formation between hexagonal and square ordered fillings of colloidal particles on periodic pinning substrates. Soft Matter, 9 (18). pp. 4607-4613. ISSN 1744-683X. doi:10.1039/c3sm27652j.

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Using large scale numerical simulations, we examine the ordering of colloidal particles on square periodic two-dimensional muffin-tin substrates consisting of a flat surface with localized pinning sites. We show that when there are four particles per pinning site, the particles adopt a hexagonal ordering, while for five particles per pinning site, a square ordering appears. For fillings between four and five particles per pinning site, we identify a rich variety of distinct ordering regimes, including disordered grain boundaries, crystalline stripe structures, superlattice orderings, and disordered patchy arrangements. We characterize the different regimes using Voronoi analysis, energy dispersion, and ordering of the domains. We show that many of the boundary formation features we observe occur for a wide range of other fillings. Our results demonstrate that grain boundary tailoring can be achieved with muffin-tin periodic pinning substrates.

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Additional Information:© 2013 The Royal Society of Chemistry. Received 16 Nov 2012, Accepted 22 Jan 2013. First published online 20 Feb 2013. This work was carried out under the auspices of the NNSA of the U.S. DoE at LANL under Contract no. DE-AC52-06NA25396. D.M. and J.A. received support from the ASC Summer Workshop program at LANL.
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Department of Energy (DOE)DE-AC52-06NA25396
LANL ASC Summer Workshop programUNSPECIFIED
Issue or Number:18
Record Number:CaltechAUTHORS:20130520-155133575
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:38581
Deposited By: Tony Diaz
Deposited On:21 May 2013 17:01
Last Modified:09 Nov 2021 23:38

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