Laser on Copper (IMAGE) Purdue University Caption A laser treats the surface of copper, giving it a texture that would allow the metal to instantly kill bacteria. Credit Purdue University/Erin Easterling Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.