Abstract
Superhydrophobic surfaces with structure-dependent switchable wettability have recently drawn considerable attention due to their special applications in droplet manipulation, rewritable liquid patterns, friction control, etc. However, it still remains a great challenge for developing tunable superhydrophobic surfaces with multiple functions including friction control through a facile strategy. Here, we apply a templating approach to fabricate switchable superhydrophobic surfaces that can reversibly transit between high-adhesion superhydrophobic and hydrophobic states by dynamically controlling the morphology of the micro/nanostructures. Notably, due to the dynamically controllable micro/nanostructures and wettability, the superhydrophobic surface shows multiple functions. The superhydrophobic surface under different wetting states can serve as a droplet capturer or reaction platform to achieve droplet manipulation. Moreover, the friction coefficient of the superhydrophobic surface can be switched between ∼ 0.4 and ∼ 0.13, demonstrating the application potential in friction control. This work offers a promising multifunctional superhydrophobic platform with dynamically controllable morphology of micro/nanostructures and wetting behaviors for the applications of droplet manipulation and friction control.
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