Julian Ritzmann at Work (IMAGE) Ruhr-University Bochum Caption Julian Ritzmann made the samples for the measurements. Credit RUB, Marquard Usage Restrictions The image may only be used for reporting about the Ruhr-Universität Bochum in the context of the press release "New insights into the energy levels in quantum dots", published in June 2020. 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.