Microplasma device and method thereof

A microplasma device comprising:

• a reaction tank containing a reaction solution;
• the reaction solution contains a nanomaterial and/or a precursor;
• a first electrode at least partially immersed in the reaction solution, wherein the first electrode comprises a conductive material;
• a second electrode is provided with a microplasma source;
• the microplasma source includes a gas inlet and a plurality of microplasma outlets arranged in a form of regular and repeated array configuration to emit a microplasma formed from a plasma gas to a surface of the reaction solution in a form of array;
• the plasma gas passes through a diffuser plate after entering from the gas inlet of the microplasma source and evenly dispersed or diffused to the microplasma outlets to form a plasma-liquid coupled reaction zone at the surface of the reaction solution, and
• wherein the plasma gas comprises Helium, Argon, Neon, Nitrogen or air;
• a power supply is electrically connected between the first electrode and the second electrode;
• and
• a voltage and current control device electrically connected between the first electrode and the second electrode, the voltage and current control device comprising:
• a resistor module including a plurality of resistors electrically connected in parallel or in series;
• a heat dissipation module including at least one heat dissipation plate physically surrounding and clamping the plurality of resistors so as to integrate the resistors and provide cooling;
• and
• a circuit board comprising a printed circuit board (PCB) having a plurality of pins arranged thereon, the number of pins corresponding to, or being sufficient to electrically connect with, each of the plurality of resistors so as to complete electrical circuit integration between the resistor module and the first and second electrodes and to form a plurality of current paths corresponding to the plurality of microplasma outlets;
• wherein the voltage and current control device regulates and stabilizes the electrical energy delivered from the first electrode to the second electrode such that each microplasma outlet of the diffuser plate receives substantially uniform plasma intensity from a single plasma source sufficient for nanomaterial synthesis;
• wherein, by switching polarity between the first electrode and the second electrode, synthesis efficiency of the nanomaterial is adjustable according to charge characteristics of different nanomaterial precursors.