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Swimming nanobots that can hunt down and destroy bacteria in water

Researchers have recently designed “two-faced” spherical microbots called Janus meant to rid water of harmful bacteria and other microorganisms. The spherical particles were made up of magnesium on one face and alternating layers of gold and iron topped by silver nanoparticles on the other. The magnesium face produced hydrogen bubbles upon contact with water, which then propelled the microbots around contaminated water. On the other hand, the bacteria in contaminated water were expected to stick to the alternating gold and iron face, which would then be killed by the silver nanoparticles.

 

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