Imagine a door handle, hospital room or kitchen countertop that is free from bacteria and not one drop of disinfectant or boiling water or dose of microwaves has been needed to zap the germs. That is the idea behind a startling discovery made by scientists in Australia. In a study published on Tuesday in the journal Nature Communications, they described how a dragonfly led them to a nano-tech surface that physically slays bacteria. The germ-killer ...
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