Treatment of enterococcus faecalis bacteria by a helium atmospheric cold plasma brush with oxygen addition

被引：45

作者：

Chen, Wei ^{[1
]}

Huang, Jun ^{[1
]}

Du, Ning ^{[2
]}

Liu, Xiao-Di ^{[2
]}

Wang, Xing-Quan ^{[1
]}

Lv, Guo-Hua ^{[1
]}

Zhang, Guo-Ping ^{[1
]}

Guo, Li-Hong ^{[2
]}

Yang, Si-Ze ^{[1
,3
]}

机构：

[1] Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Key Lab Soft Matter Phys, Beijing 100190, Peoples R China

[2] Peking Univ, Sch & Hosp Stomatol, Dept Oral Biol, Beijing 100080, Peoples R China

[3] Xiamen Univ, Sch Phys & Mech & Elect Engn, Fujian Key Lab Plasma & Magnet Resonance, Dept Aeronaut, Xiamen 361005, Peoples R China

来源：

JOURNAL OF APPLIED PHYSICS | 2012年 / 112卷 / 01期

基金：

中国国家自然科学基金;

关键词：

DIELECTRIC BARRIER DISCHARGE; STREPTOCOCCUS-MUTANS BACTERIA; BIOMEDICAL APPLICATIONS; PRESSURE; NEEDLE; SPECTROSCOPY; TEMPERATURE;

D O I：

10.1063/1.4732135

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

An atmospheric cold plasma brush suitable for large area and low-temperature plasma-based sterilization is designed. Results demonstrate that the He/O-2 plasma more effectively kills Enterococcus faecalis than the pure He plasma. In addition, the sterilization efficiency values of the He/O-2 plasma depend on the oxygen fraction in Helium gas. The atmospheric cold plasma brush using a proper ratio of He/O-2 (2.5%) reaches the optimum sterilization efficiency. After plasma treatment, the cell structure and morphology changes can be observed by the scanning electron microscopy. Optical emission measurements indicate that reactive species such as O and OH play a significant role in the sterilization process. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4732135]

引用

页数：4

共 40 条

[1] Radial description of excitation processes of molecular and atomic species in a high-pressure helium microwave plasma torch [J].