Research Article www.acsami.org
The Fluid Diode: Tunable Unidirectional Flow through Porous Substrates Joseph E. Mates,† Thomas M. Schutzius,†,‡ Jian Qin,§ Don E. Waldroup,∥ and Constantine M. Megaridis*,† †
Department of Mechanical and Industrial Engineering, University of Illinois at Chicago, Chicago, Illinois 60607, United States Department of Mechanical and Process Engineering, Swiss Federal Institute of Technology, Zürich, 8092, Switzerland § Corporate Research and Engineering, Kimberly-Clark Corporation, Neenah, Wisconsin 54956, United States ∥ Corporate Research and Engineering, Kimberly-Clark Corporation, Roswell, Georgia 30076, United States ‡
S Supporting Information *
ABSTRACT: Many important applications in fluid management could benefit from unidirectional transport through porous media via a simple, large-area, lowcost coating treatment; in essence, a fluid diode demonstrated herein for water using common cellulosic paper substrates. In electronics, the diode is an electrical component with asymmetric current transfer characteristics. A light ( 150°, droplet roll-off angle
