Title :
Effects of Atmospheric DBCD Plasma on Three Kinds of Typical Microorganisms
Author :
Zheng-Shi Chang ; Xing-Min Shi ; Guan-Jun Zhang ; Zhuo-Yuan Dong ; Xian-Jun Shao
Author_Institution :
State Key Lab. of Electr. Insulation & Power Equip., Xi´an Jiaotong Univ., Xi´an, China
Abstract :
Dielectric barrier corona discharge (DBCD) is a robust plasma reactor with high efficiency and large scalable area. Nonthermal plasma is generated by DBCD in open condition under atmospheric pressure. Products of plasma are analyzed by using spectroscopy technology. The DBCD plasma is used to treat three kinds of typical microorganisms such as Escherichia coli, Staphylococcus aureus, and Candida albicans. Then, the inactivation effects of the plasma are discussed and compared with our formerly published results of parallel-plate dielectric barrier discharge (DBD) plasma. The results show that the DBCD plasma damages microbe cells by reactive species (RS) and lower pH values, while the parallel-plate DBD plasma works mainly through microdischarge channel and RS. In addition, different cell wall configurations result in different treatment effects.
Keywords :
biological effects of ionising radiation; cellular effects of radiation; corona; microorganisms; pH; plasma applications; plasma diagnostics; Candida albicans; Escherichia coli; Staphylococcus aureus; atmospheric DBCD plasma; cell wall configurations; dielectric barrier corona discharge; low-pH values; microbe cells; microdischarge channel; microorganisms; nonthermal plasma; parallel-plate DBD plasma; parallel-plate dielectric barrier discharge plasma; plasma inactivation effect; plasma reactor; pressure 1 atm; reactive species; spectroscopy technology; Dielectrics; Discharges (electric); Electrodes; Microorganisms; Plasmas; Surface treatment; Suspensions; Air plasmas; dielectric barrier corona discharge (DBCD); inactivation effects; microdischarge channel; pH; reactive species (RS);
Journal_Title :
Plasma Science, IEEE Transactions on
DOI :
10.1109/TPS.2013.2262954
