Scanning Quantum Dot Microscope (SQDM) (image) Forschungszentrum Juelich Share Print E-Mail Caption Image from a scanning tunnelling microscope (STM, left) and a scanning quantum dot microscope (SQDM, right). Using a scanning tunnelling microscope, the physical structure of a surface can be measured on the atomic level. Quantum dot microscopy can visualize the electric potentials on the surface at a similar level of detail -- a perfect combination. Credit Copyright: Forschungszentrum Jülich / Christian Wagner Usage Restrictions Please give credit. Share Print E-Mail 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.