Microwave treatment can reduce the time of selected syntheses, for instance of gold\nnanoparticles (AuNPs), from several hours to a few minutes. We propose a microfluidic structure for\nenhancing the rate of chemical reactions using microwave energy. This reactor is designed to control\nmicrowave energy with much higher accuracy than in standard devices. Thanks to this, the influence\nof microwave irradiation on the rate of chemical reactions can be investigated. The reactor consists of a\ntransmission line surrounded by ground metallization. In order to deliver microwave energy to the\nfluid under test efficiently, matching networks are used and optimized by means of numerical methods.\nThe monolithic device is fabricated in the low temperature co-fired ceramics (LTCC) technology.\nThis material exhibits excellent microwave performance and is resistant to many chemical substances as\nwell as high temperatures. Fabrication of the devices is described in detail. Measurements of microwave\nparameters are performed and differences between simulation and experiment results are discussed.\nFinally, the usefulness of the proposed device is proved in exemplary synthesis
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