Fabricating a double nanostructure (IMAGE) Optica Caption To make the multifunctional coating system, the researchers applied a technology that allows several nanostructures to be created on top of each other. The process involved etching a nanostructure into the antifog coating and then fabricating a second nanostructure on top. Credit Anne Gärtner, Fraunhofer Institute for Applied Optics and Precision Engineering and Friedrich Schiller University Jena Usage Restrictions None License Original 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.