Quantum Dots (1 of 2) (IMAGE) Ruhr-University Bochum Caption Ph.D. student Sascha René Valentin used this equipment to generate quantum dots with electron holes. Credit RUB, Marquard 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.