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"Janus particle" microbots guided by the light

Microbots have made great strides in recent years as scientists and engineers work on creating cell-sized robots that can swim through the bloodstream and act as tiny medical commandos. However, such tiny automata are tricky to steer and control, so researchers led by Clemens Bechinger of the Max Planck Institute for Intelligent Systems are taking a page from nature and developing simple microswimmers that can mimic the light-seeking behavior of some bacteria.
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