2026-04-04T00:57:32Zhttps://recercat.cat/oai/request

oai:recercat.cat:2445/1348892025-12-04T21:01:58Zcom_2072_1057col_2072_478796col_2072_478917col_2072_478933

00925njm 22002777a 4500 dc Hernández Navarro, Sergi author Tierno, Pietro author Farrera, Joan Anton author Ignés i Mullol, Jordi author Sagués i Mestre, Francesc author 2019-06-12T12:03:57Z 2019-06-12T12:03:57Z 2014-09-26 2019-06-12T12:03:58Z 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. Col·loides Electroforesi Cristalls líquids Colloids Electrophoresis Liquid crystals Reconfigurable swarms of nematic colloids controlled by photoactivated surface patterns