Electric fields are widely used to
manipulate micro /nano/bio-particles. Among various forms of use of
electric fields, my research focuses on two different
techniques.
First,
I study the use of AC-electrokinetics and in particular
dielectrophoresis (DEP), the
motion of particles due to the interaction between a non-uniform
electric field and its induced dipole
moment on the particle.
 One
usually uses DEP force to separate two kinds of particles using the
difference in their dielectric properties. I work on a a method of
separation with multiple frequency dielectrophoresis.
I work on a modeling of the apparition of trapping of nano-size
particles with the
combination of DEP, fluid flow (such as AC electroosmosis) and Brownian
motion.
I
also study the trapping of cold neutral atoms in an
electro-magnetic ring trap. I investigate the effect of time-dependency
of the electric field on the dynamical behaviors of the particles in
these two configurations and consider the optimization of these methods.
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