Copper nanowire foams filter tiny airborne particles – Physics World

Copper nanowires that have been transformed into a foam can filter submicron-sized airborne particles with over 96.6% efficiency. The material, which is lightweight, resistant to chemicals and easy to clean, reuse and recycle, could be used in face masks as well as air cleaners to help fight the COVID-19 pandemic, according to the researchers at Georgetown University in the US who developed it.