Programming the dynamics of active colloids
Kyle Bishop, Columbia


Active colloidal particles harness energy from their environment to power directed motions relative to their fluid surroundings. Inspired by the locomotion of microorganisms, these artificial swimmers are actively pursued for their potential to navigate complex environments and deliver cargo to targeted locations.  The rational design of such particles and their assemblies requires strategies by which to encode the desired behaviors into the particles themselves or their environment.  This talk will describe two such strategies for engineering particle dynamics.  The first explores how particle shape and symmetry can be used to achieve diverse particle motions driven by various propulsion mechanisms (induced charge electrophoresis, asymmetric acoustic streaming, and contact charge electrophoresis). The second examines how patterning constraints among electrostatic particle oscillators can enable their synchronization to form traveling waves of mechanical actuation.