Inactivation of microorganisms or surface functionalization of objects with variations in form and size by means of a cold plasma process.
All the directly application relevant operating parameters of the prototype are known.
The gas pressure is an effective parameter to control plasma-chemical reactions, but its adjustment often requires substantial effort. In the Venturi-DBD (VDBD), the pressure can be set to any value between 100 mbar and 1000 mbar reliably and reproducibly. Using a Venturi pump for vacuum generation ensures that the system is affordable and almost maintenance-free. With air as process gas, the output gas composition can seamlessly be adjusted from a strongly ozone-dominated regime to a nitrogen oxides-only-regime including nitric oxide.
By its high degree of flexibility the microwave plasma source MiniMIP allows the efficient use in various sophisticated applications and experiments. The alternative use of pure argon, helium optionally complemented by admixture of molecular gases ensures the ability of matching the process chemistry to the requirements of the specific application.
The non-thermal atmospheric pressure plasma jet (ntAPPJ) is composed of a quartz capillary with an inner diameter of 4 mm and an outer diameter of 6 mm. The plasma jet operates at a high frequency of 27.12 MHz in pure noble gases (helium, neon, argon, krypton) at flow rates between 0.1 and 2 slm. Small molecular gas admixtures or organic vapors can be added to the carrier gas. Two outer ring electrodes (width 5 mm, distance 5 mm) are adjusted concentrically with the capillary axis.
The Plasmaskop plasma source is designed to be inserted into the working channel of a conventional endoscope. It has a tube-like character, is flexible, very thin and generates a biologically active jet plasma at the gas outlet. The device consists of an inner plastic tube, a ceramic nozzle, an outer plastic tube and a metal wire. The inner plastic tube is plugged upon the thin end of the ceramic nozzle. In order to provide high voltage at the end of the tube and at the same time maintain tube flexibility the metal wire is coiled around the inner tube.