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Asymmetric charge patterning on surfaces and interfaces: Formation of hexagonal domains

J. Chem. Phys. 127, 164707 (2007); doi:10.1063/1.2793038

Published 24 October 2007

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Sharon M. Loverde
Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois 60208-3108, USA

Monica Olvera de la Cruz
Department of Materials Science and Engineering, Department of Chemistry, and Department of Chemical and Biological Engineering, Northwestern University, Evanston, Illinois 60208-3108, USA
The structure of soft matter systems at interfaces is of utmost importance in the fields of nanopatterning and self-assembly. It has been shown that lamellar and hexagonal patterns can form on interfaces, for a wide variety of systems. The asphericity of charged domains is considered here for different strengths of the electrostatics, determined by the interface media, relative to the short range van der Waals interactions between the molecular components. The phase behavior of the surface structure is explored by using molecular dynamics simulations, including some dynamical aspects of the interaction between neighboring domains, using the Lindemann criterion [F. Lindemann, Z. Phys. 11, 609 (1910)]. The charge ratio of the electrostatic components influences the shape of the domains, as well as the degree of local order in the interdomain structure. ©2007 American Institute of Physics
History: Received 23 July 2007; accepted 10 September 2007; published 24 October 2007
Permalink: http://link.aip.org/link/?JCPSA6/127/164707/1
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KEYWORDS and PACS

Keywords
PACS
  • 68.47.-b
    Solid–gas/vacuum interfaces: types of surfaces
  • 68.35.Ct
    Solid-solid interface structure and roughness
  • 81.16.Rf
    Nanoscale pattern formation in nanofabrication and processing
  • 41.20.Cv
    Electrostatics; Poisson and Laplace equations, boundary-value problems
  • YEAR: 2007

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ISSN:
0021-9606 (print)   1089-7690 (online)
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