Principle of Reactive Ion (IMAGE) Technische Universität Dresden Caption Principle of reactive ion etching for the generation of quasi-periodic nanostructures. Credit (c) Sebastian Reineke et al., Nature Communications: CC BY 4.0 Usage Restrictions CC BY 4.0 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.