Biphenyl Thiol Molecule (IMAGE) Physikalisch-Technische Bundesanstalt (PTB) Caption The cover picture of the scientific journal Advanced Materials gives a schematic representation of the conversion of the monolayer of the complex molecule biphenyl thiol in the two-dimensional graphene crystal by electron irradiation and thermal treatment. Credit (Fig.: <i>Advanced Materials</i> 25 (2013). Copyright Wiley-VCH Verlag GmbH & Co. KGaA. Reproduced with permission.) Usage Restrictions None 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.