Bioinspired Hand-Operated Smart-Wetting Systems Using Smooth Liquid Coatings

Mizuki Tenjimbayashi, Takeshi Matsubayashi, Takeo Moriya, Seimei Shiratori

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


Manually controllable "hand-operated" smart systems have been developed in many fields, including smart wetting materials, electronic devices, molecular machines, and drug delivery systems. Because complex morphological or chemical control are generally required, versatile strategies for constructing the system are technologically important. Inspired by the natural phenomenon of raindrops rarely bouncing and usually spreading on a puddle, we introduce a droplet-impact-triggering smart-wetting system using "non-smart" smooth liquid coating materials. Changing the droplet impact energy by changing the volume or casting height causes the droplet to completely bounce or spread on the liquid surface, regardless of the miscibility between the two liquids, owing to the stability of air layer. As the bouncing of a droplet on a liquid interface is not usually observed during wetting, we first analyze how the droplet bounces, then prove that the wettability is triggered by the droplet's impact energy, and finally introduce some applications using this system.

Original languageEnglish
Pages (from-to)14445-14450
Number of pages6
Issue number50
Publication statusPublished - 2017 Dec 19

ASJC Scopus subject areas

  • General Materials Science
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry


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