Shrink Wrap Nanostructures -- Variable Nickel Noating (image) The Optical Society Caption These are close-up images taken with a scanning electron microscope showing the shrink wrap's surface with a fixed amount of gold (10 nm) and different thicknesses of nickel in the metal coating. The left is 5 nm thick. The middle is 15 nm thick. The right is 25 nm thick. Credit Optical Materials Express Usage Restrictions None 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.