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Colloidal crystallites under external oscillation

Kakoty, H and Huang, Y and Banerjee, R and Dasgupta, C and Ghosh, A (2020) Colloidal crystallites under external oscillation. In: Soft Matter, 16 (24). pp. 5770-5776.

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Official URL: https://doi.org/10.1039/c9sm02469g


We study the two-dimensional assemblies of interacting colloidal particles in a loosely focussed optical trap. As the optical confinement is increased, the system becomes ordered and we investigate how these crystallites maintain their order under externally imposed oscillation. For small amplitudes, the crystalline order remains intact and the system behaves like a rigid body as predicted by numerical simulations. However, the rigidity breaks at large amplitudes, which we infer to be caused by the anharmonic component of the confinement potential. These studies are general enough to be applied to other physical systems comprising ordered finite-sized assemblies under external dynamic perturbation.

Item Type: Journal Article
Publication: Soft Matter
Publisher: Royal Society of Chemistry
Additional Information: The copyright for this article belongs to Royal Society of Chemistry
Keywords: Chemistry; Materials science, Colloidal particle; Confinement potential; Crystalline order; External dynamics; Large amplitude; Optical confinement; Physical systems; Two-dimensional assemblies, Crystallites
Department/Centre: Division of Interdisciplinary Sciences > Centre for Nano Science and Engineering
Division of Physical & Mathematical Sciences > Physics
Date Deposited: 06 Feb 2023 06:48
Last Modified: 06 Feb 2023 06:48
URI: https://eprints.iisc.ac.in/id/eprint/79863

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