Illustration of the Measuring Principle (IMAGE) Forschungszentrum Juelich Caption Depending on the local electric potential field of a nanostructure on the surface of a sample, a single electron jumps from the tip of the microscope to the sensor molecule or back. Credit Copyright: Forschungszentrum Juelich Usage Restrictions Please use only in conjunction with reports related to Forschungszentrum Juelich. Please give credit. 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.