(485a) Encoding Biomimetic 3D Helical Motion in Active Particles Using Induced-Charge Electrophoresis
AIChE Annual Meeting
2019 AIChE Annual Meeting
Engineering Sciences and Fundamentals
Soft Matter Electrokinetics
Wednesday, November 13, 2019 - 8:00am to 8:15am
Active colloids are a class of microparticles that âswimâ through fluids by breaking the symmetry of the force distribution on their surfaces. Our ability to direct these particles along complex trajectories in three-dimensional (3D) space requires strategies to encode the desired forces and torques at the single particle level. Here, we show that spherical colloids with metal patches of low symmetry can be directed along non-linear 3D trajectories when powered remotely by alternating current (AC) electric fields. In particular, particles with triangular patches characterized by a single plane of mirror symmetry trace helical paths along the axis of the field. We show that helical motion can enhance particle transport through porous materials with important implications for the design of microrobots that can navigate complex environments.
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