By “putting a ring on it," microparticles can be captured

To trap and hold tiny microparticles, research engineers at Harvard have “put a ring on it,” using a silicon-based circular resonator to confine particles stably for up to several minutes.The advance, published recently in Nano Letters, could one day lead to the ability to direct, deliver, and store nanoparticles and biomolecules on all-optical chips.read more

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