toggle visibility Search & Display Options

Select All    Deselect All
 |   | 
  Record Links
Author (up) Raux, P.S.; Gravelle, S.; Dumais, J. doi  openurl
  Title Design of a unidirectional water valve in Tillandsia Type
  Year 2020 Publication Nature Communications Abbreviated Journal Nat. Commun.  
  Volume 11 Issue 1 Pages 7 pp  
  Abstract The bromeliad Tillandsia landbeckii thrives in the Atacama desert of Chile using the fog captured by specialized leaf trichomes to satisfy its water needs. However, it is still unclear how the trichome of T. landbeckii and other Tillandsia species is able to absorb fine water droplets during intermittent fog events while also preventing evaporation when the plant is exposed to the desert's hyperarid conditions. Here, we explain how a 5800-fold asymmetry in water conductance arises from a clever juxtaposition of a thick hygroscopic wall and a semipermeable membrane. While absorption is achieved by osmosis of liquid water, evaporation under dry external conditions shifts the liquid-gas interface forcing water to diffuse through the thick trichome wall in the vapor phase. We confirm this mechanism by fabricating artificial composite membranes mimicking the trichome structure. The reliance on intrinsic material properties instead of moving parts makes the trichome a promising basis for the development of microfluidics valves.  
  Address [Raux, Pascal S.; Gravelle, Simon; Dumais, Jacques] Univ Adolfo Ibanez, Fac Ingn & Ciencias, Vina Del Mar, Chile, Email:  
  Corporate Author Thesis  
  Publisher Nature Publishing Group Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 2041-1723 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000512537400017 Approved  
  Call Number UAI @ eduardo.moreno @ Serial 1101  
Permanent link to this record
Select All    Deselect All
 |   | 

Save Citations:
Export Records: