Heavy metallic microswimmers (IMAGE)
Caption
Heavy metallic microswimmers, made of rhodium (purple) and gold, swim around in a liquid solution. When confronting a sloped wall, each rod-like swimmer will reorient its body upward due to its density imbalance, and swims up like a rock climber against gravity. A hydrodynamic effect helps to amplify the action in its reorientation.
Credit
Image courtesy of Jun Zhang, NYU's Courant Institute and NYU's Department of Physics.
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