Abstract
We report a microfluidic chip designed and fabricated for the consecutive synthesis of gold nanobipyramids (Au NBPs) with controllable morphology. The seed-mediated method is employed to synthesize Au NBPs in an S-shaped micromixer. Under sufficient mixing and precise flow rate control of various reactants during microfluidic synthesis, Au NBPs with various aspect ratios can be obtained through this microfluidic platform. The dependence of reactant concentration on the morphology of synthesized Au NBPs is studied by changing the flow rate of silver nitrate (AgNO3), ascorbic acid (AA) and gold seed in microchannel respectively, analytical simulation is performed to validate the control mechanism during Au NBPs synthesis in a microchannel.
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