To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Movie S1. Water droplet attracted to the bump by capillary driving force. Multibioinspired slippery surfaces with wettable bump arrays for droplets pumping Xiaoxuan Zhang, Lingyu Sun, Yu Wang, Feika Bian, Yuetong Wang, and Yuanjin Zhao PNAS. 2019. 116:20863-20868 DOI: 10.1073/pnas.1912467116 Download Original Video Browse All Videos »