Liquid harvesting and transport on multiscaled curvatures

Chuxin Li, Cunlong Yu, Shan Zhou, Zhichao Dong, Lei Jiang

Research output: Chapter in Book/Report/Conference proceedingConference PaperOther

82 Citations (Scopus)

Abstract

Various creatures, such as spider silk and cacti, have harnessed their surface structures to collect fog for survival. These surfaces typically stay dry and have a large contact hysteresis enabling them to move a condensed water droplet, resulting in an intermittent transport state and a relatively reduced speed. In contrast to these creatures, here we demonstrate that Nepenthes alata offers a remarkably integrated system on its peristome surface to harvest water continuously in a humid environment. Multicurvature structures are equipped on the peristome to collect and transport water continuously in three steps: nucleation of droplets on the ratchet teeth, self-pumping of water collection that steadily increases by the concavity, and transport of the acquired water to overflow the whole arch channel of the peristome. The waterwetted peristome surface can further enhance the water transport speed by ~300 times. The biomimetic design expands the application fields in water and organic fogs gathering to the evaporation tower, laboratory, kitchen, and chemical industry.

Original languageEnglish
Title of host publicationProceedings of the National Academy of Science of the United States of America
PublisherNational Academy of Sciences
Pages23436-23442
Number of pages7
Volume117
Edition38
DOIs
Publication statusPublished - 22 Sept 2020
Externally publishedYes

Publication series

NameProceedings of the National Academy of Sciences of the United States of America
PublisherNational Academy of Sciences
ISSN (Print)0027-8424

Keywords

  • Biomimetic structure
  • Directional liquid transport
  • Fog harvest
  • Multiscaled curvature

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