Controlling droplet motion after impact on solid surfaces is crucial for applications like self-cleaning and microfluidics, yet the fundamental limit of the droplet rebound angle remains unknown. This study reveals a droplet behavior where it rapidly rolls with a rebound angle near zero, defining the lower limit, enabled by asymmetric adhesion on nanostructured surfaces, resulting in greatly enhanced cleaning efficiency and precise droplet transport.
- Zhipeng Zhao
- Wei Li
- Liqiu Wang