Quadripolar Tennis Ball Structure (IMAGE) Johannes Gutenberg Universitaet Mainz Caption Quadripolar tennis ball structure of stiff polymers at high densities. Credit Ill./©: Arash Nikoubashman, Mainz University Usage Restrictions This image may only be used in connection with the press release "Physicists gain new insights into nanosystems with spherical confinement", published by Johannes Gutenberg University Mainz on July 26, 2017. 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.