Silica Nanoparticles (image) The Optical Society Caption Figure (a) shows a roughly circular water droplet containing silica nanoparticles resting on an untreated glass surface. Figure (c) demonstrates how a UV laser can alter the surface texture, allowing the droplet to preferentially flow over the more wettable section, changing the shape of the droplet. Credit Credit: Optical Materials Express. Usage Restrictions None 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.