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Black silicon slices and dices bacteria

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Originally discovered by accident in the 1980s, black silicon is silicon with a surface that has been modified to feature nanoscale spike structures which give the material very low reflectivity. Researchers have now found that these spikes can also destroy a wide range of bacteria, potentially paving the way for a new generation of antibacterial surfaces.

Surface structures similar to black silicon can be found in nature. Earlier this year, researchers at the Swinburne Institute of Technology in Australia led by Professor Elena Ivanova and Professor Russell Crawford found that the wings of the cicada Psaltoda claripennis could shred certain types of rod-shaped bacteria.
 
 

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