A microfluidic device with four electrodes in a tetrahedral arrangement is used to demonstrate three-dimensional (3D) trapping of an individual 40 nm fluorescent nanoparticle in solution. Astigmatic imaging is used to determine the particle position in 3D for real-time control of the electrode pot ... [Appl. Phys. Lett. 103, 043102 (2013)] published Mon Jul 22, 2013.
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