Particle Trapping and Manipulation using Mobile Microvortices
by Jesse Collis
Abstract: A new technique for controlled manipulation of microscale particles has been developed using microvortices. A nanowire is rotated around it's geometrical center by a weak magnetic field allowing it to have locomotion throughout the fluid. As this rotating nanowire approaches a particle, the particle translates to the center of the microvortex and becomes trapped. The particle can then be transported around the fluid with the nanowire. Existing theories do not describe the trapping of the particle due to the low Reynolds number regime ( < 0.1) that the fluid is operating in. I will present my progress on developing a new theory to describe this particle trapping effect.