Session
2024 Session 6
Location
Salt Lake Community College Westpointe Campus, Salt Lake City, UT
Start Date
5-6-2024 10:50 AM
Description
Creating the next generation of dynamic colloidal materials that change their structure based on external stimuli may require the capability to precisely manipulate colloidal particles. Colloidal particles can be manipulated using a variety of forces, such as electric, magnetic, and optical, but so far chemical reactions have received less attention. We consider here a novel paradigm for using a chemically active colloidal particle to interact with other, passive colloids and precisely manipulate colloidal particles in a microfluidic device, a strategy which we dub “chemical herding”. Specifically, we show in simulation that chemical herding can be used to move a small number of colloidal particles onto pre-defined target positions. We also highlight experimental progress we have made toward chemical herding.
Chemical Herding: Using Chemical Reactions to Steer Colloidal Particles
Salt Lake Community College Westpointe Campus, Salt Lake City, UT
Creating the next generation of dynamic colloidal materials that change their structure based on external stimuli may require the capability to precisely manipulate colloidal particles. Colloidal particles can be manipulated using a variety of forces, such as electric, magnetic, and optical, but so far chemical reactions have received less attention. We consider here a novel paradigm for using a chemically active colloidal particle to interact with other, passive colloids and precisely manipulate colloidal particles in a microfluidic device, a strategy which we dub “chemical herding”. Specifically, we show in simulation that chemical herding can be used to move a small number of colloidal particles onto pre-defined target positions. We also highlight experimental progress we have made toward chemical herding.