Rectification of Mobile Leidenfrost Droplets by Planar Ratchets

Jing Li, Xiaofeng Zhou, Yujie Zhang, Chonglei Hao, Fuwang Zhao, Minfei Li, Hui Tang, Wenjing Ye, Zuankai Wang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

36 Citations (Scopus)


The self-transportation of mobile Leidenfrost droplets with well-defined direction and velocity on millimetric ratchets is one of the most representative and spectacular phenomena in droplet dynamics. Despite extensive progress in the ability to control the spatiotemporal propagation of droplets, it remains elusive how the individual ratchet units, as well as the interactions within their arrays, are translated into the collective droplet dynamics. Here, simple planar ratchets characterized by uniform height normal to the surface are designed. It is revealed that on planar ratchets, the transport dynamics of Leidenfrost droplets is dependent not only on individual units, but also on the elegant coordination within their arrays dictated by their topography. The design of planar ratchets enriches the fundamental understanding of how the surface topography is translated into dynamic and collective droplet transport behaviors, and also imparts higher applicability in microelectromechanical system based fluidic devices.

Original languageEnglish
Article number1901751
Issue number9
Publication statusPublished - 5 Mar 2020


  • collective coordination
  • fluidic devices
  • individual effect
  • Leidenfrost droplets
  • rectification

ASJC Scopus subject areas

  • Biotechnology
  • Biomaterials
  • General Chemistry
  • General Materials Science


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