Hannover 2010 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe
P: Fachverband Plasmaphysik
P 1: Plasmatechnology
P 1.6: Vortrag
Montag, 8. März 2010, 15:25–15:40, B 302
Filamentary and homogeneous DBD modes for human skin treatment:Discharge characterization and simulation of surface irradiation — •Priyadarshini Rajasekaran1, Philipp Mertmann1, Nikita Bibinov1, Dirk Wandke2, Wolfgang Vioel3, and Peter Awakowicz1 — 1AEPT, Ruhr Universitaet Bochum — 2Cinogy GmbH — 3HAWK & Laser-Laboratorium, Goettingen
The DBD plasma source comprises of a ceramic-covered copper electrode and is suitable for direct use on human body. A homogeneous discharge superimposed with plasma filaments is ignited on the surface of the human body as seen by microphotography. Stochastic filamentary discharge is obtained with aluminium plate and PBS solution, and homogeneous discharge with glass, as opposite electrodes. During treatment, when the plasma source encounters a raised point like hair strand on the body surface, a single-filamentary discharge is ignited. To study this discharge mode, grounded aluminium spike is used as counter electrode. These 3 different DBD modes are characterized by determining gas temperature, electron density & electron energy distribution function (EEDF) by applying optical emission spectroscopy (OES), current-voltage measurements, numerical simulation and microphotography. The fluxes of photons, nitric oxide and ozone to the treated surface are calculated. Plasma conditions and the production of active species in each mode are distinct.The estimated fluxes in the single filamentary mode are the highest but the treated surface area is very small. For treating larger area, the homogeneous DBD is more effective than the stochastic filamentary discharge.