Inactivation of bacteria by a mixed argon and oxygen micro-plasma as a function of exposure time

Chih Chiang Weng, Yi Te Wu, Juinn Der Liao, Chi Yuan Kao, Chih Cheng Chao, Juu En Chang, Bo Wen Hsu

研究成果: Article

12 引文 (Scopus)

摘要

Purpose: A radio-frequency dielectric barrier discharge (DBD) was applied as a micro-plasma device for the inactivation of bacteria, e.g., Escherichia coli. Materials and methods: The cultured bacteria were placed on a polydimethyl siloxane (PDMS) film and placed inside the DBD cavity. The bacteria were exposed to micro-plasmas of varying oxygen/argon ratios for different exposure times. The survival of the bacteria was measured by determining bacterial growth using optical methods. Results: The excited oxygen species increased with the increase in the oxygen to argon ratio as measured by optical emission spectroscopy (OES), but the increase of excited oxygen species in argon micro-plasma did not enhance the inactivation of bacteria. In contrast, increases in the time the bacteria were exposed to the micro-plasma were of importance. The results show that a continuous plasma flow containing energetic and reactive species may result in electro-physical interactions with bacteria exposed to the plasma leading to their inactivation. Conclusion: For currently-employed DBD device, addition of 0.5% oxygen to the argon micro-plasma for an exposure time of 30 sec was optimum for the inactivation of E. coli.

原文English
頁(從 - 到)362-368
頁數7
期刊International Journal of Radiation Biology
85
發行號4
DOIs
出版狀態Published - 2009 四月 1

指紋

Argon
Oxygen
Bacteria
Siloxanes
Escherichia coli
Equipment and Supplies
Radio
Spectrum Analysis
Growth

All Science Journal Classification (ASJC) codes

  • Radiological and Ultrasound Technology
  • Radiology Nuclear Medicine and imaging

引用此文

Weng, Chih Chiang ; Wu, Yi Te ; Liao, Juinn Der ; Kao, Chi Yuan ; Chao, Chih Cheng ; Chang, Juu En ; Hsu, Bo Wen. / Inactivation of bacteria by a mixed argon and oxygen micro-plasma as a function of exposure time. 於: International Journal of Radiation Biology. 2009 ; 卷 85, 編號 4. 頁 362-368.
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abstract = "Purpose: A radio-frequency dielectric barrier discharge (DBD) was applied as a micro-plasma device for the inactivation of bacteria, e.g., Escherichia coli. Materials and methods: The cultured bacteria were placed on a polydimethyl siloxane (PDMS) film and placed inside the DBD cavity. The bacteria were exposed to micro-plasmas of varying oxygen/argon ratios for different exposure times. The survival of the bacteria was measured by determining bacterial growth using optical methods. Results: The excited oxygen species increased with the increase in the oxygen to argon ratio as measured by optical emission spectroscopy (OES), but the increase of excited oxygen species in argon micro-plasma did not enhance the inactivation of bacteria. In contrast, increases in the time the bacteria were exposed to the micro-plasma were of importance. The results show that a continuous plasma flow containing energetic and reactive species may result in electro-physical interactions with bacteria exposed to the plasma leading to their inactivation. Conclusion: For currently-employed DBD device, addition of 0.5{\%} oxygen to the argon micro-plasma for an exposure time of 30 sec was optimum for the inactivation of E. coli.",
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Inactivation of bacteria by a mixed argon and oxygen micro-plasma as a function of exposure time. / Weng, Chih Chiang; Wu, Yi Te; Liao, Juinn Der; Kao, Chi Yuan; Chao, Chih Cheng; Chang, Juu En; Hsu, Bo Wen.

於: International Journal of Radiation Biology, 卷 85, 編號 4, 01.04.2009, p. 362-368.

研究成果: Article

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AU - Kao, Chi Yuan

AU - Chao, Chih Cheng

AU - Chang, Juu En

AU - Hsu, Bo Wen

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