Sensor concept (IMAGE) Technische Universität Dresden Caption The active film for the novel sensor concept is only as thick as a human hair, here processed on thin glass substrates, and exhibits a wavelength-dependent luminescence. Credit Anton Kirch Usage Restrictions No 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.