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. 2020 Oct 26;5(1):2000077. doi: 10.1002/gch2.202000077

Figure 2.

Figure 2

Fabrication and characterization of an iSTPV. a) Photograph of the as‐prepared lab‐scale iSTPV. b) Absorption curves of the selective absorber and blackbody emitter, and calculated absorptance of a 100 µm thick water layer in UV–VIS–NIR–MIR band. c) Optical image of the low‐cost polystyrene foam and air‐laid paper used for the construction of 2D water supply channel. d) The side‐view (upper) and top‐view (lower) SEM images of the air‐laid paper. Scale bar, 10 µm. e) Water (100 µL) permeates through the paper rapidly (240 ms). f) Photograph of the paper showing the solute accumulation after water evaporation. g) IR images of the dry solute/paper i) before and ii, iii, iv) after 2, 108, and 144 s touching with water.