Two-Scale Structure (1 of 2) (image) Georgia Institute of Technology Research News Share Print E-Mail Caption This image shows silicon pyramid structures etched for one minute using hydrogen fluoride/hydrogen peroxide/water solution. The resulting structure has roughness at the micro and nanometer scales. Credit Image courtesy of C.P. Wong Usage Restrictions None Share Print E-Mail 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.