Document Type

Article

Publication Date

2005

DOI

10.1063/1.2045549

Publication Title

Applied Physics Letters

Volume

87

Issue

113902

Pages

1-3

Abstract

As low-temperature non-equilibrium plasmas come to play an increasing role in biomedical applications, reliable and user-friendly sources need to be developed. These plasma sources have to meet stringent requirements such as low temperature (at or near room temperature), no risk of arcing, operation at atmospheric pressure, preferably hand-held operation, low concentration of ozone generation, etc. In this letter, we present a device that meets exactly such requirements. This device is capable of generating a cold plasma plume several centimeters in length. It exhibits low power requirements as shown by its current-voltage characteristics. Using helium as a carrier gas, very little ozone is generated and the gas temperature, as measured by emission spectroscopy, remains at room temperature even after hours of operations. The plasma plume can be touched by bare hands and can be directed manually by a user to come in contact with delicate objects and materials including skin and dental gum without causing any heating or painful sensation.

Original Publication Citation

Laroussi, M., & Lu, X. (2005). Room-temperature atmospheric pressure plasma plume for biomedical applications. Applied Physics Letters, 87(113902), 1-3. doi: 10.1063/1.2045549