Electrically controlled topological micro cargo transportation

Bhadwal, A.S., Mottram, N.J. , Saxena, A., Sage, I.C. and Brown, C.V. (2020) Electrically controlled topological micro cargo transportation. Soft Matter, 16(12), pp. 2961-2970. (doi: 10.1039/C9SM01956A) (PMID:32119011)

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We demonstrate electrically controlled linear translation and precision positioning of a colloidal particle in a soft matter device. The basis of transportation is the time dependent electric field reconfiguration and manipulation of a topological line defect between two distinct hybrid aligned nematic liquid crystal domains having opposing tilt orientations. Deliberately tuning an applied voltage relative to a low threshold value (5.7 V at 1 kHz) permits defect trapping of the colloidal particle and allows subsequent control over the particle's velocity and bidirectional linear movement over millimeter distances, without the need for externally imposed flow nor for lateral confining walls.

Item Type:Articles
Additional Information:ASB and AS gratefully acknowledge Nottingham Trent University (Nottingham UK) and Merck Chemicals Ltd (Chilworth UK) for PhD Scholarship funding.
Glasgow Author(s) Enlighten ID:Mottram, Professor Nigel
Authors: Bhadwal, A.S., Mottram, N.J., Saxena, A., Sage, I.C., and Brown, C.V.
College/School:College of Science and Engineering > School of Mathematics and Statistics > Mathematics
Journal Name:Soft Matter
Publisher:Royal Society of Chemistry
ISSN (Online):1744-6848
Published Online:24 February 2020
Copyright Holders:Copyright © 2020 The Royal Society of Chemistry
First Published:First published in Sot Matter 16(12): 2961-2970
Publisher Policy:Reproduced under a Creative Commons License

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