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Contact: Steve Bradt
Harvard University

Single-Wall Carbon Nanotube

Caption: Launched laser-cooled atoms are captured by a single, suspended, single-wall carbon nanotube charged to hundreds of volts. A captured atom spirals towards the nanotube (white path) and reaches the environs of the tube surface, where its valence electron (yellow) tunnels into the tube. The resulting ion (purple) is ejected and detected, and the dynamics at the nanoscale are sensitively probed.

Credit: Anne Goodsell and Tommi Hakala/Harvard University

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