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Title: Reconfigurable swarms of nematic colloids controlled by photoactivated surface patterns
Author: Hernández Navarro, Sergi
Tierno, Pietro
Farrera, Joan Anton
Ignés i Mullol, Jordi
Sagués i Mestre, Francesc
Keywords: Col·loides
Cristalls líquids
Liquid crystals
Issue Date: 26-Sep-2014
Publisher: Wiley-VCH
Abstract: Different phoretic driving mechanisms have been proposed for the transport of solid or liquid microscopic inclusions in integrated chemical processes. It is now shown that a substrate that was chemically modified with photosensitive self-assembled monolayers enables the direct control of the assembly and transport of large ensembles of micrometer-sized particles and drops that were dispersed in a thin layer of anisotropic fluid. This strategy separates particle driving, which was realized by AC electrophoresis, and steering, which was achieved by elastic modulation of the nematic host fluid. Inclusions respond individually or in collective modes following arbitrary reconfigurable paths that were imprinted by irradiation with UV or blue light. Relying solely on generic material properties, the proposed procedure is versatile enough for the development of applications that involve either inanimate or living materials.
Note: Versió postprint del document publicat a:
It is part of: Angewandte Chemie-International Edition, 2014, vol. 53, p. 10696-10700
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ISSN: 1433-7851
Appears in Collections:Articles publicats en revistes (Ciència dels Materials i Química Física)
Articles publicats en revistes (Química Inorgànica i Orgànica)

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