A New Method of Detecting Gas Molecules (IMAGE) Chalmers University of Technology Caption Molecules are identified by activating dark electronic states in the sensor material, resulting in a new visible peak. The altered optical fingerprint of the material proves the presence of molecules. Credit Maja Feierabend and Ermin Malic Usage Restrictions CC 3.0 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.