Dumbbell impurities in 2D crystals of repulsive colloidal spheres induce\n particle-bound dislocations

2020/10/01 by Vera Meester, Casper van der Wel, Meester, Vera +7
Chemistry · Materials Science · #Electrostatics and Colloid Interactions #FOS: Physical sciences #Material Dynamics and Properties #Pickering emulsions and particle stabilization #Soft Condensed Matter (cond-mat.soft)

paper · pdf · doi:10.48550/arxiv.2010.00267

openalex publication_date 2020/10/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

Impurity-induced defects play a crucial role for the properties of crystals,\nbut little is known about impurities with anisotropic shape. Here, we study how\ncolloidal dumbbells distort and interact with a hexagonal crystal of charged\ncolloidal spheres at a fluid interface. We find that subtle changes in the\ndumbbell length induce a transition from a local distortion to a particle-bound\ndislocation, and determine how the dumbbell moves inside the repulsive\nhexagonal lattice. Our results provide new routes towards controlling material\nproperties through particle-bound dislocations.\n

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