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In this article, we investigated the impact of a two electrodes argon atmospheric pressure plasma jet with a second grounded electrode (SGE) on the basil ( Ocimumbasilicum ) seeds germination rate. The SGE enhanced the axial electric field in the direction of the treated sample. The plasma operated with two current pulses per each halve a cycle of an applied voltage. The second plasma jet current pulsed increased from 0.7 mA to 3.6 mA and the emission of the O (777.2 nm) increased 3.85 times when the jet operated with the SGE compared to that operated without SGE. The germination rate increased by eight times at 5 min of exposure using the SGE. The SEM images proved a clear etching of the basil ( O.basilicum ) seed surface by plasma jet with more pronounced etching and cracks by using SGE specially at higher exposure times.

Second grounded electrode non-equilibrium atmospheric pressure argon plasma jet impact on germination of basil ( Ocimum basilicum ) seeds