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Schematic depiction of the creation of a multilayer material through drop‐on‐demand printing. Individual ink drops coalesce to form wet layers. Solvent from the wet layer evaporates to form dry layers. These dry layers may serve as substrates for deposition of the next material. After all layers are deposited, postprinting treatment may be used to remove residual solvent or additives or to cross‐link polymers. Reproduced from Ref. 41 with permission of Wiley‐VCH.
