Gas‐phase peroxynitrite generation using dielectric barrier discharge at atmospheric pressure: A prospective sterilizer. Issue 11 (24th August 2021)

• Record Type: Journal Article
• Authors: Liu, Kun; Duan, Qingsong; Zheng, Zhenfeng; Zhou, Rusen; Zhou, Renwu; Tang, Weibin; Cullen, Patrick; (Ken) Ostrikov, Kostya
• Is Part Of: Plasma processes and polymers. Volume 18:Issue 11(2021)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2021-08-24
• Subjects: dielectric barrier discharge -- gaseous peroxynitrite -- germination inhibition -- green disinfectant; Plasma polymerization -- Periodicals; Plasma-enhanced chemical vapor deposition -- Periodicals; Plasma chemistry -- Periodicals
• DOI: 10.1002/ppap.202100016
• Languages: English
• ISSNs: 1612-8850

Abstract

Abstract : An effective antimicrobial agent, gaseous peroxynitrite, is produced in a single step using a plasma generator. The peroxynitrite process control mechanism between gas composition and power density is analyzed. And the germination inhibition efficiency of Penicillium digitatum presents a correlation with the concentration of the gaseous peroxynitrite. Abstract: Peroxynitrite is an important chemical in the human immune system, which has high biocidal activity and can resist the invasion of pathogens. Currently, in vitro generation of peroxynitrite faces major technological challenges, especially for gas‐phase production, which requires low‐pressure conditions. Here, we report the method of how to generate gas‐phase peroxynitrite at atmospheric pressure using dielectric barrier discharge. Results show that the peroxynitrite concentration positively correlates with energy density. Moreover, Penicillium digitatum, a common fungus contaminant greatly affecting food and fruit preservation, was used as a microbial pathogen model to confirm the biocidal effects of ozone‐free nitrogen oxides under different discharge conditions. The germination inhibition efficiency of P. digitatum is highly likely attributed to the synergistic effect of gaseous peroxynitrite and NO.