Droplet bouncing electricity generation on graphene substrate

Abstract Since the discovery of the phenomenon of droplets bouncing on hydrophobic surfaces, researchers have been dedicated to studying the underlying physical mechanisms of this phenomenon. Particularly, in recent years, researchers have focused on the observation that droplet bouncing can generate electrical signals. Inspired by this, we explore the potential applications of electrical signals generated by droplets (water droplets) bouncing in sensors and other relevant fields. In this study, we chose a well-established reduced graphene oxide (rGO) film, typical in the sensor field, as a substrate to investigate the bouncing electricity generation performance of water droplets on it. Three variable factors were considered, including droplet bouncing on rGO substrates with different inclinations, bouncing of droplets of different sizes at the same inclination on rGO substrates, and droplet dropping frequency, to investigate their effects on the electrical signals.