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Nematic Colloidal Swarms Assembled and Transported on Photosensitive Surfaces
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We demonstrate a novel method to assemble and transport swarms of colloidal particles by combining liquid crystals enabled electrophoresis and photo-sensitive surface patterning. Colloidal particles are propelled in a nematic liquid crystal via application of an alternating current electric field. Swarms of particles are assembled into a rotating mill cluster, or moved as a whole along predefined paths photo-imprinted on chemically functionalized substrates. This technique represents an alternative approach to fluid based lab-on-a-chip technologies guiding the motion of large ensembles of micrometer scale solid or liquid inclusions.
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HERNÁNDEZ NAVARRO, Sergi, et al. Nematic Colloidal Swarms Assembled and Transported on Photosensitive Surfaces. IEEE Transactions on Nanobioscience. 2015. Vol. 14, num. 3, pags. 267-271. ISSN 1536-1241. [consulted: 28 of June of 2026]. Available at: https://hdl.handle.net/2445/67215