A microscopic close-up of the copper surface. (Smith et al., Biomaterials, 2021) ========================================================================= Copper is well known for being able to kill off bacteria that it comes into contact with – the metal releases ions that are toxic to bacterial cells, punching through their outer membranes. However, this process usually takes several hours. A newly developed copper surface does the job in just a couple of minutes, though, some 120 times faster than normal copper. The less time the bacteria hang around, of course, the safer that surfaces like door handles and worktops are going to be. The scientists behind...