image: A high magnification optical image showing water harvesting on a directional hydrophilic slippery rough surface. This material relates to a paper that appeared in the March 30, 2018, issue of Science Advances, published by AAAS. The paper, by X. Dai at Pennsylvania State University in University Park, Pa., and colleagues was titled, "Hydrophilic directional slippery rough surfaces for water harvesting." view more
Credit: [Credit: Xianming Dai, Nan Sun, and Tak-Sing Wong]