Figure 2.

Continuous laminar flow microreactors for the synthesis of wire/rod-like ZnO materials. (A) ZnO Nanowires grown by chemical bath deposition in a continuous flow microreactor (a, b, c, and d SEM images were taken at positions downstream from the inlet). Reproduced with permissions from reference⁴⁸, copyright 2009, American Chemical Society. (B) Schematics of in-situ synthesis and integration of ZnO nanowires in microfluidic chip: (top) global synthesis in the entire fluidic channel and (bottom) local synthesis by microheaters in the fluidic channel. Reproduced with permissions from reference⁵³, copyright 2011, Royal Society of Chemistry. (C) Schematic diagram showing the growth of the seed layer and vertical ZnO nanowire arrays using the microreactor-assisted nanoparticle deposition system. Reproduced with permissions from reference⁶⁸, copyright 2016, Royal Society of Chemistry. (D) Schematic diagram of (a) patterned growth of ZnO nanowire arrays by an in situ synthesis method and (b) growth of ZnO nanowires on microstructure arrays by a conventional hydrothermal method. Reproduced with permissions from reference⁵⁴, copyright 2012, Royal Society of Chemistry. (E) Microfluidic hydrothermal growth of ZnO nanowires over high aspect ratio microstructures. Reproduced with permissions from reference⁵⁸, copyright 2013, IOP Publishing, Ltd. (F) Schematic diagram of the synthesis of the ZnO/Zn(OH)F nanofiber array constructed on the inner wall of capillary microchannel. Reproduced with permissions from reference⁷³, copyright 2016, Elsevier.