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Plasma jet printing, which does not require preprocessing and postprocessing, is a promising technology for manufacturing flexible electronics. The conductive properties should be confirmed to ensure the performance of the flexible electronics. In this study, the conductive properties and control mechanism of plasma jet‐printed silver patterns were investigated. Analyses show that high‐energy particles in the plasma decomposed organic solvents and induced the interconnection between silver nanoparticles. The plasma jet‐printed silver patterns had high uniformity in vertical spatial distribution. The dense packing of the silver patterns was achieved by increasing the number of printed layers, reducing the print speed, and increasing the focusing ratio. Oxidation of the silver nanoparticles was reduced and the conductivity was improved by increasing the focusing ratio. [ABSTRACT FROM AUTHOR]

Carbon paper is commonly used for catalytic electrode preparation because of its high conductivity, corrosion resistance, and stability. However, traditional electrode preparation methods are inappropriate for highly hydrophobic carbon paper. In this paper, a high‐activity carbon paper catalytic electrode was prepared using multistrategies cold plasma modification to create atomic structural defects, dope N and Cu elements, and introduce oxygen‐containing functional groups. Analyses show that the bombardment of high‐energy particles caused atomic structural defects. Nitrogen and copper entered the carbon paper through plasma‐induced chemical recombination and physical adsorption, reaching 5.26% and 3.83%, respectively. Ethanol‐based plasma introduced oxygen‐containing functional groups to improve hydrophilicity. Finally, the plasma‐prepared electrode exhibited a reduction efficiency of 87.69% in an electrocatalytic nitrate reduction reaction. [ABSTRACT FROM AUTHOR]