An interfacial floating tumbler with a penetrable structure and Janus wettability inspired by Pistia stratiotes .

Designing advanced interfacial materials is decisive to the improvement of multiphase systems. Inspired by the superior floatability of Pistia stratiotes , here we present a superhydrophobic/hydrophilic 3D Janus floater with a water managing ability. Its self-regulated floatation mechanism, as well as its water removal logic, should provide insight into the development of multifunctional interfacial carriers in the fields of micro-devices, solar evaporation, etc.