Abstract
The prospect of using magnetic particles for biomedical purposes in lab-on-a-chip systems compels accurate and flexible particle manipulation. Toward such a goal we designed a microdevice comprising a pair of meander-shaped current carrying conductors, which enable simultaneous magnetophoresis and dielectrophoresis by generating both a traveling magnetic field and an ac electric field. Therefore, both the in-plane and out-of-plane movements of magnetic particles can be electrically controlled. A transport speed of tens of μm∕s was achieved with actuation forces at piconewton scale. The enhanced control of particle movement avoids the contact and nonspecific adhesion between the particle and device.
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