How Light Can Sort Drug Molecules by Their Handedness, One at a Time
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A gold nanoparticle, roughly a hundred nanometres across, drifts through a drop of water towards an impossibly thin glass thread. The thread (an optical nanofibre, barely half a micrometre in diameter) is carrying laser light, and the particle can’t help but get pulled towards it. Once caught in the fringe of the light field, the particle begins to move. What happens next depends not on its size, not on its weight, but on which way it twists.
That twist is chirality: the property of being
That twist is chirality: the property of being
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