title: Fog collecting biomimetic surfaces: Influence of microstructure and wettability.
abstract: We analyzed the fog collection efficiency of three different sets of samples: replica (with and without microstructures), copper wire (smooth and microgrooved) and polyolefin mesh (hydrophilic, superhydrophilic and hydrophobic). The collection efficiency of the samples was compared in each set separately to investigate the influence of microstructures and/or the wettability of the surfaces on fog collection. Based on the controlled experimental conditions chosen here large differences in the efficiency were found. We found that microstructured plant replica samples collected 2-3 times higher amounts of water than that of unstructured (smooth) samples. Copper wire samples showed similar results. Moreover, microgrooved wires had a faster dripping of water droplets than that of smooth wires. The superhydrophilic mesh tested here was proved more efficient than any other mesh samples with different wettability. The amount of collected fog by superhydrophilic mesh was about 5 times higher than that of hydrophilic (untreated) mesh and was about 2 times higher than that of hydrophobic mesh.
authors.affiliation: Nees Institute for Biodiversity of Plants, Rheinische Friedrich-Wilhelms-University of Bonn. Venusbergweg 22, 53115, Bonn, Germany.
authors.forename: M A K
authors.initials: MA
authors.lastname: Azad
authors.forename: D
authors.initials: D
authors.lastname: Ellerbrok
authors.forename: W
authors.initials: W
authors.lastname: Barthlott
authors.forename: K
authors.initials: K
authors.lastname: Koch
mesh_terms: D000327:Adsorption; D040761:Biomimetic Materials / Q000737:chemistry*; D057927:Hydrophobic and Hydrophilic Interactions; D008422:Materials Testing; D018515:Plant Leaves / Q000737:chemistry* / Q000648:ultrastructure*; D014867:Water / Q000737:chemistry*; D014887:Weather; D017155:Wettability
chemical_list: D014867:Water