Microstructured Silicon Surfaces (IMAGE) ETH Zurich Caption Special microstructured silicon surfaces repel water droplets so strongly that the droplets are catapulted upwards. Credit Digit Works / ETH Zurich 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.