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Photothermal manipulation has been proven as an effective strategy to trap and rotate mesoscopic particles, whose features are scales ranging from tens of nanometers to hundreds of micrometers. In particular, the extraordinary ability of highly-efficient non-contact photothermal manipulation based on fiber waveguide has stimulated a number of breakthroughs in lab-on-a-chip techniques and research...
Manipulating large numbers of a variety of particles/wires is essential for many lab-on-a-chip technologies. Here we generate a planar array of optofluidic vortices with photothermal gradients from an easy-fabricated graphene oxide (GO) heater to achieve high-throughput and multiform manipulation at low excitation power and low loss. As a tweezer, each vortex can rapidly capture and confine particles...
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