Fig. 2: The fabrication and characterization of GAH.
From: Multifunctional solar water harvester with high transport selectivity and fouling rejection capacity
a, Schematic of the gelation, reduction, cross-linking and laser printing for the fabrication of GAH. b, Photographs of GAH membrane to show the black appearance (left) and flexibility (right). c, Cross-sectional SEM image of GAH. d, An enlarged view of c. e, SEM image of GAH surface and the real fish-scale surface. f, The images of water contact angle of GAH and the water droplet transport on the fish-scale-inspired surface of GAH (the white arrows describe the direction of droplet transmission). g, UV–Vis–near-infrared spectra of GAH (red curve), and rGO/alginate hydrogel without fish-scale-like pattern (black curve).
