Multiple Liquid Manipulations on Patterned Surfaces with Tunable Adhesive Property

Micro/nanostructured surfaces with designable wettability show great promise in many fields. This paper reports a new strategy for fabricating superhydrophobic surfaces with tunable water adhesion force by combining multiscale surface structures and mussel-inspired surface chemistry, which can be used for multiple liquid manipulations. Highly ordered porous films prepared by the breath figure method enable convenient construction of surfaces with honeycomb-patterned or nanosized pincushion-like structures. Multiple liquid manipulations including no-loss transportation of water droplets, water collection, programmable movement of water droplets, and chemical reaction monitoring are demonstrated on the micro/nanostructured surfaces. The proposed method is facile, energy-efficient, and can be conducted for the preparation of superhydrophobic surfaces with high contrast adhesion patterns.