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Schematic diagrams and photos of the biomimetic and non-biomimetic reactors. (a) and (c) Non-biomimetic reactor (sample #1); (b) and (d) biomimetic reactor (sample #2). Each reactor consists of three layers, a glass top, a microstructured layer, and a glass substrate. At the bottom of the reaction chamber is a TiO2 film (1 cm × 1 cm × 50 μm). Bifurcate tree-branch microchannels are used to connect the inlet and the outlet to the reaction chamber.
