Achieving Low Voltage Plasma Discharge in Aqueous Solution Using Lithographically Defined Electrodes and Metal/Dielectric Nanoparticles

• DOI: 10.1021/acsami.4c06007
• Publication Date: 2024-06-20T19:09:46Z
• Authors: Ruoxi Li; Indu Aravind; Sizhe Weng; Zhi Cai; Boxin Zhang; Stephen B. Cronin
• Keywords: Nanosecond

Because of the high dielectric strength water, it is extremely difficult to discharge plasma in a controllable way aqueous phase. By using lithographically defined electrodes and metal/dielectric nanoparticles, we create electric field enhancement that enables liquid electrolytes at significantly reduced applied voltages. Here, use voltage (10–30 kV) nanosecond pulse (20 ns) discharges generate transient An electrode geometry with radius curvature approximately 10 μm, gap distance 300 an estimated 5 × 106 V/cm resulted reduction threshold from 28 23 kV. A second structure had around μm 100 9 but did not perform as well larger electrodes. Adding gold nanoparticles nm diameter) solution further for 17 kV due water/gold interface, E-field 4×. alumina decorated Pt 14 In this scenario, emergence triple point juncture alumina, Pt, water results coexistence three distinct constants singular location. This leads notable concentration field, effectively aiding initiation voltage. To gain more comprehensive detailed understanding mechanism, performed rigorous numerical simulations. These simulations provide valuable insights into intricate interplay between electrodes, resulting distribution, enabling us extract crucial information optimize design parameters enhanced performance.