Kathryn Reddy's Research Interest
Electrophoretic motion can be used to quantify particle charge. Through this experiment we were able to quantify electrophoretic effects using optophoretic tools. Using an optical tweezers setup we studied the electrophoretic motion of a polystyrene particle in an oscillating electric field. A lock-in amplifier provided amplitude and phase measurements, and a function generator provided an AC electric field to our sample chamber. Manipulation of the relevant equation of motion allowed us to calculate particle charge and electrophoretic mobility.
