Nanostructured Walls (IMAGE) DOE/SLAC National Accelerator Laboratory Caption An electron micrograph shows the pattern of nanostructured walls on the surface of the device. Plopped into a sample of contaminated water and placed in sunlight, it killed more than 99.999 percent of bacteria in just 20 minutes. Credit (C. Liu et al., Nature Nanotechnology) 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.