By Anupam Sengupta

This paintings represents one of many first accomplished makes an attempt to seamlessly combine hugely lively interdisciplinary domain names in delicate subject technology – microfluidics and liquid crystals (LCs). influenced by way of the inability of basic experiments, Dr. Sengupta initiated systematic research of LC flows at micro scales, gaining new insights which are additionally suggestive of novel purposes. via tailoring the skin anchoring of the LC molecules and the channel dimensions, various topological constraints have been controllably brought in the microfluidic units. those topological constraints have been extra manipulated utilizing a move box, paving the best way for Topological Microfluidics. Harnessing topology on a microfluidic platform, as defined during this thesis, opens up features past the normal viscous-dominated microfluidics, promising strength functions in designated supply and sorting structures, self-assembled motifs, and novel metamaterial fabrications.

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Additional info for Topological Microfluidics: Nematic Liquid Crystals and Nematic Colloids in Microfluidic Environment

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In general, DMOAP is expected to induce strong homeotropic anchoring of the LC molecules [8, 9]. The silane molecules attach themselves perpendicular to the microsphere surface, thereby biasing the NLC molecules to anchor homeotropically (Fig. 2b). In Chap. 4 we shall once again use DMOAP to induce homeotropic anchoring on the walls of the microchannels. Water droplets of sizes similar to the colloid particles were also dispersed within the nematic host. Generally, homeotropic anchoring at the water-LC interface is achieved using a suitable surfactant [10].

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