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Figure 10. (A) PVA/PPy hydrogel membrane with micro-topologies and its schematic illustration. (B) Represents the fabricated PVA-PPy gel micro-tree array. (C) 24/7 water collection diagram of the floating device. (D) SEM images of tree topology. (E) Simulated patterns and temperature gradients for different micro-topologies and photographs of the fog collection process on a gel tree (a red circle indicates the formation of the droplet while a red arrow indicates the motion of the droplet), (F) Consistent fog collection rates of different membranes. Reprinted with permission from ref.^[146]. Copyright 2021 Springer Nature.