標題: | Atomic Oxygen and Hydroxyl Radical Generation in Round Helium-Based Atmospheric-Pressure Plasma Jets by Various Electrode Arrangements and Its Application in Sterilizing Streptococcus mutans |
作者: | Liu, Chih-Tung Wu, Ching-Jung Yang, Yi-Wei Lin, Zhi-Hua Wu, Jong-Shinn Hsiao, Shun-Chung Lin, Chun-Pin 機械工程學系 Department of Mechanical Engineering |
關鍵字: | Atmospheric-pressure plasma;dental sterilization;discharge gap;electrodes arrangement;plasma medicine |
公開日期: | 1-十二月-2014 |
摘要: | The reactive chemical species generated in an atmospheric-pressure plasma jet (APPJ), such as hydroxyl radical and atomic oxygen, are generally regarded as the major sources for several biomedical applications. In this paper, we propose an APPJ with a 25-kHz high-voltage powered stainless steel tube fixed inside a quartz tube and an aluminum grounded electrode that is wrapped around the quartz tube. The results show that the radical intensities of atomic oxygen and hydroxyl radical, gas temperature, and power absorption increase with increasing distance of discharge gap distance under the same applied voltage. Increasing the width of grounded electrode increases gas temperature and causes higher power absorption but only slight change of radical generation. We have applied the APPJ with the conditions of highest radical generation (grounded electrode width = discharge gap distance = 15 mm) for effectively sterilizing Streptococcus mutans within 15 s, which shows a highly potential application for root canal disinfection. |
URI: | http://dx.doi.org/10.1109/TPS.2014.2345096 http://hdl.handle.net/11536/124108 |
ISSN: | 0093-3813 |
DOI: | 10.1109/TPS.2014.2345096 |
期刊: | IEEE TRANSACTIONS ON PLASMA SCIENCE |
Volume: | 42 |
Issue: | 12 |
起始頁: | 3830 |
結束頁: | 3836 |
顯示於類別: | 期刊論文 |