Golden section criterion to achieve droplet trampoline effect on metal-based superhydrophobic surface

Shengteng Zhao, Zhichao Ma (), Mingkai Song, Libo Tan, Hongwei Zhao and Luquan Ren
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Shengteng Zhao: Jilin University
Zhichao Ma: Jilin University
Mingkai Song: Jilin University
Libo Tan: Jilin University
Hongwei Zhao: Jilin University
Luquan Ren: Jilin University

Nature Communications, 2023, vol. 14, issue 1, 1-10

Abstract: Abstract Clarifying the consecutive droplet rebound mechanisms can provide scientific inspirations to regulate dynamic wettability of superhydrophobic surface, which facilitates the practical applications on efficient heat control and active anti-icing. Generally, droplet rebound behaviors are directly affected by surface structure and Weber number. Here, we report a novel “golden section” design criterion to regulate the droplet rebound number determined by the structure spacing, subverting conventional knowledge. Especially, the droplet can continuously rebound for 17 times on the metal-based surface, exhibiting an amazing phenomenon of “droplet trampoline”. The droplet rebound number has been experimentally revealed to be closely related to Weber number. We propose novel quantitative formulas to predict droplet rebound number and clarify the coupling effect of the structure spacing and the Weber number on the rebound mechanisms, which can be utilized to establish the regulation criteria of rebound numbers and develop novel metal-based superhydrophobic materials.

Date: 2023
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DOI: 10.1038/s41467-023-42375-3

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