Microfluidical Microwave Reactor for Synthesis of Gold Nanoparticles

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.

Microfluidic Modules Integrated with Microwave Components—Overview of Applications from the Perspective of Different Manufacturing Technologies

“…One of the examples of the aforementioned devices is a microwave microreactor for the synthesis of gold nanoparticles, presented in [ 108 ]. As a substrate, LTCC DP951 PX was chosen.…”

Natrium Karbonat : Termodinamika dan Transport Ion

“…Mobilitas ion merupakan perbandingan antara laju dan kuat medan. (5) Mobilitas ion juga dapat dihitung menggunakan pengukuran sebenarnya antara jarak yang di tempuh setiap ion dengan waktu yang diperlukannya untuk menempuh jarak (6) Mobilitas ion dapat dihitung dengan pengukuran sebenarnya jarak yang ditempuh setiap ion dalam waktu tertentu dengan metode (246) batas bergerak.…”

Fab on a Package: LTCC Microfluidic Devices Applied to Chemical Process Miniaturization

“…One of the biggest problems associated with the Turkevich Method is the need to heat the solutions near 100 °C in order to activate reducing power of citrate. It is found in literature examples of glass capillaries heated on hot plate [ 71 ], or application of microwaves in LTCC micrometric channels [ 72 ], so it was desirable to construct a device adapted for all peculiarities of this kind, containing high residence time for heating the reagents separately, and connected to a serpentine mixer for controlled mixing when both are already heated.…”