The roles of the various plasma agents in the inactivation of bacteria
The roles of the various plasma agents in the inactivation of bacteria
复制标题
DOI：
10.1063/1.2977674
复制
发表时间：
2008-09-01
影响因子：
3.2
通讯作者：
Pan, Yuan
中科院分区：
文献类型：
--
作者：
Lu, XinPei;Ye, Tao;Pan, Yuan
最近，人们研究了各种血浆制剂在细菌灭活中的作用。然而，到目前为止，带电粒子对细菌灭活的影响还不是很清楚。本文利用大气压等离子体喷流装置产生峰值电流为300 mA的冷等离子体p羽流，研究带电粒子在失活过程中的作用。结果表明，当以He/N-2(3%)为工作气体时，带电粒子在失活过程中的作用较小。另一方面，当使用He/O-2(3%)时，带电粒子有望在细菌灭活中发挥重要作用。进一步分析表明，负离子O-2(-)可能是起作用的带电粒子。此外，还发现O、O-3和亚稳态O-2*等活性物种在细菌失活过程中起着至关重要的作用。而被激发的He*N-2C(3)PI和N-2(+)B(2)Sigma(+)(U)2U对细菌的灭活没有显著的直接影响。热和紫外线在失活过程中没有或起到很小的作用。(C)2008年美国物理研究所。
The roles of various plasma agents in the inactivation of bacteria have recently been investigated. However, up to now, the effect of the charged particles on the inactivation of bacteria is not well understood. In this paper, an atmospheric pressure plasma jet device, which generates a cold plasma p plume carrying a peak current of 300 mA, is used to investigate the role of the charged particles in the inactivation process. It is found that the charged particles play a minor role in the inactivation process when He/N-2(3%) is used as working gas. On the other hand, when He/O-2(3%) is used, the charged particles are expected to play an important role in the inactivation of bacteria. Further analysis shows that the negative ions O-2(-) might be the charged particles that are playing the role. Besides, it is found that the active species, including O, O-3, and metastable state O-2*, can play a crucial role in the inactivation of the bacteria. However, the excited He* N-2 C (3)Pi, and N-2(+) B (2)Sigma(+)(u) 2 U have no significant direct effect on the inactivation of bacteria. It is also concluded that heat and UV play no or minor role in the inactivation process. (C) 2008 American Institute of Physics.