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The limit of droplet rebound angle

  • Zhipeng Zhao
  • , Wei Li
  • , Xiaotian Hu
  • , Qiyu Deng
  • , Yiyuan Zhang
  • , Shaojun Jiang
  • , Pengcheng Sun
  • , Hengjia Zhu
  • , Hegeng Li
  • , Siyi Shi
  • , Zhandong Huang
  • , An Li
  • , Huizeng Li
  • , Meng Su
  • , Fengyu Li
  • , Steven Wang
  • , Yanlin Song
  • , Liqiu Wang
  • The University of Hong Kong
  • Nanchang University
  • City University of Hong Kong
  • Peking University
  • Jinan University
  • Hong Kong Polytechnic University

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

Regulating the motion state of droplets after impacting on solid surfaces is crucial in many fields including self-cleaning, energy harvesting, and microfluidics. The rebound angle of the droplet is a key factor in determining its motion state. However, up until now, the limit of droplet rebound angle remains unidentified. Here, we reveal a previously undiscovered droplet rebound behavior that the droplet rolls rapidly along the surface with a rebound angle close to 0 degrees, the limit of the droplet rebound angle. Such unexpected behavior originates from the droplet behaving like two mutually perpendicular springs enabled by continuous asymmetric adhesion provided by the heterogeneous modified nanostructure. This boundary-rolling behavior of droplets contributes to scientific and technical advances in various fields that involve droplet-impact, as illustrated through examples of enhanced cleaning efficiency (improved by 349%) and well-controlled droplet transport in tortuous passages which can hardly be achieved before without external fields coupling.

Original languageEnglish
Article number5684
JournalNature Communications
Volume16
Issue number1
DOIs
StatePublished - Dec 2025

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