Scanning Tunnelling Microscope (IMAGE) University of Konstanz Caption This is a scanning tunnelling microscope installed in a helium cooling device seen from below (with the sample stage removed). The mechanism for positioning the microscope tip above the sample surface is visible (center of image). Credit Simon Diesch 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.