Electrokinetic particle entry into microchannels.

摘要: The fundamental understanding of particle electrokinetics in microchannels is relevant to many applications. To date, however, the majority previous studies have been limited motion within area microchannels. This work presents first experimental and numerical investigation electrokinetic entry into a microchannel. We find that can be significantly deviated from fluid streamline by dielectrophoresis at reservoir-microchannel junction. negative dielectrophoretic induced inherent non-uniform electric field junction insensitive microchannel length. It slows down entering particles pushes them toward center consequence demonstrated deflection, focusing, trapping phenomena Such rich are studied tuning AC component DC-biased field. They also utilized implement selective concentration continuous separation size inside reservoir.