Schematic diagram of the experimental setup used in this study. (a) Cross-sectional view of the microplasma array device; (b) photographs of well-aligned air plasma generated at V_PP = 14 kV, acquired from the frontage and broadside of discharge area respectively; (c) top view of the plasma device; (d) discharge and diffusion model of the microplasma jet unit as recorded with the PMT and ICCD camera.