Flower-like zinc oxide particles (IMAGE) ETH Zurich Caption These flower-like zinc oxide particles are three micrometres in size (colourised electron microscope image Credit Dong Wook Kim / Max Planck Institute for Intelligent Systems) Usage Restrictions Ask for permission if you want to use this image. License Original 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.