GaAs-Nanowires on a Silicon Surface (IMAGE) Technical University of Munich (TUM) Caption Gallium-arsenide nanowires are on a silicon surface. Credit Thomas Stettner/Philipp Zimmermann / TUM 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.