A Wafer-Thin Graphene Flake (image) Technical University of Munich (TUM) Share Print E-Mail Caption Visible to the naked eye: a wafer-thin graphene flake obtained via chemical vapor deposition. The red coloration of the copper substrate appears when the sample is heated in air. Credit Photo: J. Kraus/ TUM Usage Restrictions Can be published only together with this Press Release 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.