434907 Transport of Active Colloidal Particles By Chemically-Driven Transport

Tuesday, November 10, 2015: 12:30 PM
Canyon B (Hilton Salt Lake City Center)
Darrell Velegol, Chemical Engineering, Penn State University, University Park, PA

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.

Extended Abstract: File Not Uploaded
See more of this Session: Active Colloidal Systems II
See more of this Group/Topical: Engineering Sciences and Fundamentals