Integrated Microwave Atmospheric Plasma Source (IMAPlaS): thermal and spectroscopic properties and antimicrobial effect onB. atrophaeusspores

Autor:	Roland Gesche, René Bussiahn, Silvio Kühn, K.-D. Weltmann
Rok vydání:	2012
Předmět:	Argon Chemistry Analytical chemistry chemistry.chemical_element Atmospheric-pressure plasma Plasma Condensed Matter Physics medicine.disease_cause Nitrogen medicine Emission spectrum Ultraviolet Helium Microwave
Zdroj:	Plasma Sources Science and Technology. 21:065011
ISSN:	1361-6595 0963-0252
Popis:	The Integrated Microwave Atmospheric Plasma Source (IMAPlaS) operating with a microwave resonator at 2.45 GHz driven by a solid-state transistor oscillator generates a core plasma of high temperature (T > 1000 K), therefore producing reactive species such as NO very effectively. The effluent of the plasma source is much colder, which enables direct treatment of thermolabile materials or even living tissue. In this study the source was operated with argon, helium and nitrogen with gas flow rates between 0.3 and 1.0 slm. Depending on working gas and distance, axial gas temperatures between 30 and 250 °C were determined in front of the nozzle. Reactive species were identified by emission spectroscopy in the spectral range from vacuum ultraviolet to near infrared. The irradiance in the ultraviolet range was also measured. Using B. atrophaeus spores to test antimicrobial efficiency, we determined log10-reduction rates of up to a factor of 4.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::aa471064569d28a593d565c9576eccd2 https://doi.org/10.1088/0963-0252/21/6/065011 Zobrazit plný text záznamu