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Micromachines 2017, 8(11), 318; https://doi.org/10.3390/mi8110318

Microfluidical Microwave Reactor for Synthesis of Gold Nanoparticles

1
Faculty of Microsystem Electronics and Photonics, Wrocław University of Science and Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland
2
Faculty of Electronics, Wrocław University of Science and Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland
*
Author to whom correspondence should be addressed.
Received: 8 September 2017 / Revised: 23 October 2017 / Accepted: 23 October 2017 / Published: 26 October 2017
(This article belongs to the Special Issue Integrated Microfluidics for Chemical Synthesis and Analysis)
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Abstract

Microwave treatment can reduce the time of selected syntheses, for instance of gold nanoparticles (AuNPs), from several hours to a few minutes. We propose a microfluidic structure for enhancing the rate of chemical reactions using microwave energy. This reactor is designed to control microwave energy with much higher accuracy than in standard devices. Thanks to this, the influence of microwave irradiation on the rate of chemical reactions can be investigated. The reactor consists of a transmission line surrounded by ground metallization. In order to deliver microwave energy to the fluid under test efficiently, matching networks are used and optimized by means of numerical methods. The monolithic device is fabricated in the low temperature co-fired ceramics (LTCC) technology. This material exhibits excellent microwave performance and is resistant to many chemical substances as well as high temperatures. Fabrication of the devices is described in detail. Measurements of microwave parameters are performed and differences between simulation and experiment results are discussed. Finally, the usefulness of the proposed device is proved in exemplary synthesis. View Full-Text
Keywords: microfluidics; microwave chemistry; low temperature co-fired ceramics (LTCC) microfluidics; microwave chemistry; low temperature co-fired ceramics (LTCC)
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Macioszczyk, J.; Rac-Rumijowska, O.; Słobodzian, P.; Teterycz, H.; Malecha, K. Microfluidical Microwave Reactor for Synthesis of Gold Nanoparticles. Micromachines 2017, 8, 318.

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