High‐Efficiency Reclamation of Oscillating Energy During Multiple Droplets Impact on Bionic Lotus Surface

Abstract Droplet bouncing on special wettability surface is common and important in daily life engineering applications (anti‐icing drag reduction, etc.). However, there are few studies the multiple droplets impact a lack of systematic research interaction oscillation bounce. Here, porous superhydrophobic bionic lotus studied by high‐speed camera system. On (Surf‐1), an impacting droplet can merge another larger sessile bounce off. Comparing with single impact, it suggested that make more efficient use air cushion micrometer‐nanometer‐scale binary structure (MNBS) show self‐cleaning performance Surf‐1 better. Moreover, theory for damped harmonic oscillators, found prolong (last >250 ms) slow down attenuation energy. The energy be efficiently recycled to shortening interval ( t i ). fundamental understanding reclamation oscillating beneficial scientific design new applications.