Wang, Yu Directional Droplet Propulsion on Gradient Boron Nitride Nanosheet Grid Surface Lubricated with a Vapor Film below the Leidenfrost Temperature. [electronic resource] - ACS nano Dec 2018 - 11995-12003 p. digital Publication Type: Journal Article ISSN: 1936-086X Standard No.: 10.1021/acsnano.8b04039 doi