Tuesday, November 10, 2015: 12:30 PM
Canyon B (Hilton Salt Lake City Center)
Transport of colloidal particles usually occurs due to external potentials like gravitational, magnetic, or electrical. However, particles can behave as active matter when they produce potential gradients around themselves. In roughly the past decade, active particles that undergo auto-electrophoresis were discovered. More recently, particles that undergo chemically-driven auto-transport have been studied, for example due to dissolution that produces a chemical gradient. The physics of this transport is diffusiophoresis, discovered by Derjaguin in 1947. Previously, this transport mechanism was thought to be primarily esoteric. However, in this talk, chemically-driven self-transport is explored as a method for producing self-moving colloidal particles, and collectively as self-moving active matter that can move in hard-to-access locations.