Eur. Phys. J. Appl. Phys.
Volume 26, Number 3, June 2004
14th International Colloquium on Plasma Processes (CIP 2003)
|Page(s)||203 - 208|
|Section||Plasma, Discharges and Processes|
|Published online||11 May 2004|
Sterilization of dental bacteria in a N2-O2 microwaves post-discharge, at low pressure: influence of temperature
CPAT, University Paul Sabatier, 118 route
de Narbonne, 31062 Toulouse, France
2 GREMI, University Paul Sabatier, 118 route de Narbonne, 31062 Toulouse, France
Corresponding author: email@example.com
Revised: 28 December 2003
Accepted: 12 March 2004
Published online: 11 May 2004
Recently, plasmas have been largely studied to develop a new cold and safe sterilization process. The plasma efficiency on bacteria destruction has been proved at low or near atmospheric pressure. In our investigation we used a N2-O2 post discharge at low pressure, where the experimental conditions allowing the optimal production of active species have been determined: 100 Watt, 1 Ln.min−1, 5 Torr. By exposing E. coli to these plasma conditions, it is demonstrated a synergy of N and O active atoms on substrate temperature: a reduction of 6 log was achieved after a treatment time of 20 minutes at 80 °C and of 12 log after 5 minutes at 120 °C.
PACS: 52.80.-s – Electric discharges / 52.70.-m – Plasma diagnostic techniques and instrumentation / 81.65.-b – Surface treatments
© EDP Sciences, 2004
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