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Main Title: Coarse-grained treatment of the self-assembly of colloids suspended in a nematic host phase
Author(s): Püschel-Schlotthauer, Sergej
Stieger, Tillmann
Melle, Michael
Mazza, Marco G.
Schoen, Martin
Type: Article
Language Code: en
Abstract: The complex interplay of molecular scale effects, nonlinearities in the orientational field and long-range elastic forces makes liquid-crystal physics very challenging. A consistent way to extract information from the microscopic, molecular scale up to the meso- and macroscopic scale is still missing. Here, we develop a hybrid procedure that bridges this gap by combining extensive Monte Carlo (MC) simulations, a local Landau-de Gennes theory, classical density functional theory, and finite-size scaling theory. As a test case to demonstrate the power and validity of our novel approach we study the effective interaction among colloids with Boojum defect topology immersed in a nematic liquid crystal. In particular, at sufficiently small separations colloids attract each other if the angle between their center-of-mass distance vector and the far-field nematic director is about 30 degrees. Using the effective potential in coarse-grained two-dimensional MC simulations we show that self-assembled structures formed by the colloids are in excellent agreement with experimental data.
Issue Date: 2016
Date Available: 24-Oct-2017
DDC Class: 530 Physik
Sponsor/Funder: DFG, GRK 1524, Self-Assembled Soft-Matter Nanostructures at Interfaces
Journal Title: Soft matter
Publisher: Royal Society of Chemistry
Publisher Place: Cambridge
Volume: 12
Issue: 2
Publisher DOI: 10.1039/c5sm01860a
Page Start: 469
Page End: 480
EISSN: 1744-6848
ISSN: 1744-683X
Appears in Collections:FG Theoretische Chemie » Publications

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