EHD-driven mass transport enhancement in surface dielectric barrier discharges
| Autor: | Paolo Seri, Matteo Taglioli, Felipe Iza, Gabriele Neretti, Alexander R.P. Wright, Alexander H. Shaw, Benjamin Fitzpatrick, Carlo Angelo Borghi |
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| Přispěvatelé: | Taglioli, Matteo, Shaw, A., Wright, A., Fitzpatrick, B., Neretti, Gabriele, Seri, Paolo, Borghi, CARLO ANGELO, Iza, F. |
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
010302 applied physics
Chemistry business.industry Analytical chemistry Atmospheric pressure plasma Transport Atmospheric-pressure plasma Dielectric Substrate (electronics) Plasma Condensed Matter Physics 01 natural sciences 010305 fluids & plasmas 0103 physical sciences Electrode Optoelectronics DBD Electrohydrodynamics Diffusion (business) business EHD Power density |
| Popis: | Surface dielectric barrier discharges (S-DBDs) have received renewed attention in recent years for their potential application in emerging biomedical, environmental and agricultural applications. In most of these applications, the plasma is not in direct contact with the substrate being treated and the transport of reactive species from the plasma to the substrate is typically assumed to be controlled by diffusion. Here, we demonstrate that generally this is not the case and that electrohydrodynamic (EHD) forces can produce jets that enhance the delivery of these species, thereby influencing the efficacy of the S-DBD device. In particular, we have studied the degradation of potassium indigotrisulfonate solutions exposed to S-DBDs generated in devices with annular electrodes of diameters varying between 10 mm and 50 mm. All the devices were driven at constant linear power density (watts per cm of plasma length) and although local plasma properties remained the same in all the devices, a three-fold efficacy enhancement was observed for devices of diameter ∼30 mm due to EHD effects. |
| Databáze: | OpenAIRE |
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