Tunable colloid trajectories in nematic liquid crystals near wavy walls
arXiv:1808.00778 · doi:10.1038/s41467-018-06054-y
Abstract
The ability to dictate colloid motion is an important challenge in fields ranging from materials science to living systems. Here, by embedding energy landscapes in confined nematic liquid crystals, we design a versatile platform to define colloidal migration. This is achieved by placing a wavy wall, with alternating hills and wells, in nematic liquid crystals, to impose a smooth elastic energy field with alternating splay and bend distortions. This domain generates (meta) stable loci that act as attractors and unstable loci that repel colloids over distances large compared to the colloid radius. Energy gradients in the vicinity of these loci are exploited to dictate colloid trajectories. We demonstrate several aspects of this control, by studying transitions between defect configurations, propelling particles along well defined paths and exploiting multistable systems to send particles to particular sites within the domain. Such tailored landscapes have promise in reconfigurable systems and in microrobotics applications
arXiv comment13 pages, 8 figures
References in corpus (8)
- Topological Defects and Interactions in Nematic Emulsions
- Director Field Configurations around a Spherical Particle in a Nematic Liquid Crystal
- Transport of Particles in Liquid Crystals
- Exploiting imperfections: Directed assembly of surface colloids via bulk topological defects
- Theory of Elastic Interaction of the Colloidal Particles in the Nematic Liquid Crystal Near One Wall and in the Nematic Cell
- Experimental realization of the "lock-and-key" mechanism in liquid crystals
- The key-lock mechanism in nematic colloidal dispersions
- Particle selection through topographic surface patterns in nematic colloids
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