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Optimum working parameters for the plasma needle used for bacterial deactivation

A. SIMON1,* , S. D. ANGHEL1, J. PAPP2

Affiliation

  1. Babes-Bolyai University, Faculty of Physics, Cluj-Napoca, 400084, Romania
  2. Babes-Bolyai University, Faculty of Biology and Geology, Cluj-Napoca, 400015, Romania

Abstract

This paper presents the operating stability diagram for atmospheric pressure non-thermal He plasma with the aim of establishing the optimum working parameters for bacterial deactivation applications. The diagram indicates that there are four regions and three different shapes for the plasma. The plasma temperature was determined via thermocouple method. The atomic and molecular species present in the plasma were identified by emission spectroscopy technique. The excitation temperature for He is around 0.2-0.25 eV. Escherichia coli cultures were deactivated successfully, results function of treatment time or gas flow-rate are presented and are compared with other sterilization techniques..

Keywords

Non-thermal plasma, Stability diagram, Bacterial deactivation.

Submitted at: March 1, 2008
Accepted at: July 10, 2008

Citation

A. SIMON, S. D. ANGHEL, J. PAPP, Optimum working parameters for the plasma needle used for bacterial deactivation, Journal of Optoelectronics and Advanced Materials Vol. 10, Iss. 8, pp. 2077-2081 (2008)