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Potentiality of non‐thermal atmospheric pressure plasma in activating plant development has been evaluated in this study. Seed germination rate of Coriander sativum, a herbaceous plant with slow germination rate, has been significantly increased over time compared to control after micro DBD (dielectric barrier discharge) plasma treatment with N2 feeding gas. No more increase in seed germination has been observed when the transferred energy dose was over 0.65 J per seed during plasma generation, regardless of feeding gases. Germination and seedling growth have been also elevated by plasma‐generated nitric oxide (PGNO) produced from microwave plasma torch in dose dependent manner and a threshold concentration of nitric oxide (NO) activating coriander development has been observed. Our data indicate that plasma energy transferred to seeds or PGNO can activate developmental processes in plant.

Supercapattery devices have gained extraordinary attention due to high power and energy densities with excellent cycle stability compared to conventional storage devices. Herein, the cobalt manganese sulfide (CoMnS) is synthesized using the hydrothermal method, and designed the supercapattery device. Further, carbon nanotubes (CNTs) are used to make a composite with CoMnS and measure the electrochemical characteristics. A high value of specific capacity (Q s = 934.7 C/g) is estimated at a current density of 1.5 A/g in the CoMnS/ CNT composite sample, which is higher than the reference sample. Besides, the asymmetric supercapattery device is designed to measure the real device. In CoMnS/CNT//AC supercapattery device, the conceived value of the Q s is 137.06 C/g with an extraordinary energy density of 38.4 Wh/kg and power density of 1120 W/kg. A reliability test is conducted to explore stability, and the device is subjected to 10 000 charging/discharging cycles and observed that 84% of the nominal capacity is maintained. The composite of sulfides with CNTs provides a unique platform to design a unique and novel electrode material for supercapattery and other energy storage devices.

Vertically aligned carbon nanotubes (CNTs) are essential to studying high current density, low dispersion, and high brightness. Vertically aligned 14 × 14 CNT emitters are fabricated as an island by sputter coating, photolithography, and the plasma-enhanced chemical vapor deposition process. Scanning electron microscopy is used to analyze the morphology structures with an average height of 40 µm. The field emission microscopy image is captured on the microchannel plate (MCP). The role of the microchannel plate is to determine how the high-density electron beam spot is measured under the variation of voltage and exposure time. The MCP enhances the field emission current near the threshold voltage and protects the CNT from irreversible damage during the vacuum arc. The high-density electron beam spot is measured with an FWHM of 2.71 mm under the variation of the applied voltage and the exposure time, respectively, which corresponds to the real beam spot. This configuration produces the beam trajectory with low dispersion under the proper field emission, which could be applicable to high-resolution multi-beam electron microscopy and high-resolution X-ray imaging technology.