Nano Etching (IMAGE) Penn State Caption A single layer of silicon atoms (black) bind to the moving silica tip of a scanning probe microscope. Credit Lei Chen/Southwest Jiaotong University Usage Restrictions Non commercial use only 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.