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Main Title: Generic model for tunable colloidal aggregation in multidirectional fields
Author(s): Kogler, Florian
Velev, Orlin D.
Hall, Carol K.
Klapp, Sabine H. L.
Type: Article
Language Code: en
Abstract: Based on Brownian Dynamics computer simulations in two dimensions we investigate aggregation scenarios of colloidal particles with directional interactions induced by multiple external fields. To this end we propose a model which allows continuous change in the particle interactions from point-dipole-like to patchy-like (with four patches). We show that, as a result of this change, the non-equilibrium aggregation occurring at low densities and temperatures transforms from conventional diffusion-limited cluster aggregation (DLCA) to slippery DLCA involving rotating bonds; this is accompanied by a pronounced change of the underlying lattice structure of the aggregates from square-like to hexagonal ordering. Increasing the temperature we find a transformation to a fluid phase, consistent with results of a simple mean-field density functional theory.
Issue Date: 2015
Date Available: 25-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: 11
Issue: 37
Publisher DOI: 10.1039/c5sm01103e
Page Start: 7356
Page End: 7366
EISSN: 1744-6848
ISSN: 1744-683X
Notes: Dieser Beitrag ist mit Zustimmung des Rechteinhabers aufgrund einer (DFG geförderten) Allianz- bzw. Nationallizenz frei zugänglich.
This publication is with permission of the rights owner freely accessible due to an Alliance licence and a national licence (funded by the DFG, German Research Foundation) respectively.
Appears in Collections:FG Computersimulationen und Theorie komplexer Fluide » Publications

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