A Periodic Wetting Surface Driven by Triboelectric Nanogenerator for Efficient Postimpact Droplet Collection

The phenomenon of droplet impact is widely observed in nature and industrial processes. No matter the intrinsic wettability (hydrophobic, hydrophilic, superhydrophobic) surface, postimpact droplets tend to rebound or splash. dynamics have been well investigated but inhibition rebounding splashing requires further exploration. This paper proposes a periodic wetting surface (PWS) driven by triboelectric nanogenerator (TENG) for efficient collection. With high-voltage electric signal generated from rotating freestanding (RF-TENG), an interdigital electrodes-based electrowetting-on-dielectric (EWOD) can be changed periodically. impacts on PWS show oscillating sliding motion that compensates kinetic energy splashing. As compared pure hydrophobic hydrophilic surfaces, shows best collection performance. effects RF-TENG such as open-circuit voltage (0.44–3.00 kV) frequency (0–60 Hz), contents ions type concentration efficiency are discussed. Finally, practical application demonstrated TENG real-time high-efficiency multiple droplets.