Please use this identifier to cite or link to this item:
http://hdl.handle.net/2445/127850
Title: | Assembly and transport of nematic colloidal swarms above photo-patterned defects and surfaces |
Author: | Straube, Arthur V. Pagès Casas, Josep M. Ortiz-Ambriz, Antonio Tierno, Pietro Ignés i Mullol, Jordi Sagués i Mestre, Francesc |
Keywords: | Col·loides Cristalls líquids Colloids Liquid crystals |
Issue Date: | 18-Jul-2018 |
Publisher: | Institute of Physics Pub. |
Abstract: | We investigate the dynamic assembly and swarm translocation of anisometric colloidal particles dispersed in a nematic liquid crystal and driven above a photosensitive surface. We use liquid crystal-enabled electrophoresis to propel these particles via an alternating electric field perpendicular to the sample cell. By manipulating the anchoring conditions on one surface of the experimental cell, we obtain a spatially extended spiral pattern of the liquid crystal orientation that induces the dynamic assembly of a rotating colloidal mill. This structure can be transported by translocating the topological defect above the photosensitive surface. We complement our findings with a theoretical model that captures the basic physics of the process, by formulating an analytic equation for the director field above the surface. Our reconfigurable nematic assemblies may be used as a test bed for complex swarming behaviour in biological and artificial microscale systems. |
Note: | Reproducció del document publicat a: http://iopscience.iop.org/article/10.1088/1367-2630/aac3c6 |
It is part of: | New Journal of Physics, 2018, vol. 20, p. 075006 |
URI: | http://hdl.handle.net/2445/127850 |
ISSN: | 1367-2630 |
Appears in Collections: | Articles publicats en revistes (Ciència dels Materials i Química Física) |
Files in This Item:
File | Description | Size | Format | |
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682995.pdf | 3.08 MB | Adobe PDF | View/Open |
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