Physico-chemical characterization of a surface dielectric barrier discharge plasma source

Research output: Contribution to conferencePoster

Abstract

Cold Atmospheric pressure Plasma (CAP) generated by Dielectric Barrier Discharges (DBDs) are being studied and developed for an ever-widening range of applications in both biomedical and industrial areas. [1] In particular surface DBDs (SDBDs), consisting of a planar powered electrode separated from a grounded mesh by a thin dielectric layer have been gaining great interest for their ability to produce highly reactive atmospheres at close-to-environmental temperature and almost independent from the electrical properties of the target, which is treated in the afterglow of the surface plasma.

The active chemistry initiated in the afterglow of SDBDs operated in air is characterized by the presence of long-lived reactive oxygen and nitrogen species such as O3, NOx and HNOx, which are recognized to play important role in many industrial and biomedical applications based on the use of the plasma afterglow.
Knowing the kinetics of all the chemical species produced in the plasma and in its afterglow is a fundamental step towards the understanding, control and optimization of the processes for which SDBDs are being used: this need is indeed met both by experiments and by increasingly complex simulation tools and computational models. [3]

The proposed project focuses on the physico-chemical characterization of an SDBD plasma source – the same used in the work of E. Simoncelli et al [2] – supplied with a high voltage AC generator with tunable frequency and duty cycle.
First a study of the surface power density (SPD) variation as a function of voltage, frequency and duty cycle was made. Then the kinetics of O3/NO2/NO3 concentrations in the plasma afterglow were studied by means of OAS measurements.

This project’s main aim is to gather additional knowledge on the kinetics of the produced reactive species, comparing the results with the ones obtained by E. Simoncelli et al in [2] with the same source but with a different power supply, providing additional evidence to their assertion about SPD being the driving parameter for plasma afterglow kinetics.
A second aim is to provide a set of data that can be used as input, benchmark and validation of simulation tools for future modelling of the SDBD chemistry itself.


References
[1] R. Brandenburg 2017 Plasma Sources Sci. Technol. 26 053001
[2] E. Simoncelli et al 2019 Plasma Sources Sci. Technol. 28 095015
[3] Y. Sakiyama et al 2012 J. Phys. D: Appl. Phys. 45 425201
Original languageEnglish
Publication statusPublished - 28 Nov 2019
EventWELTPP-22: Workshop on the Exploration of Low-Temperature Plasma Physics - Kerkrade, Netherlands
Duration: 28 Nov 201929 Nov 2019

Conference

ConferenceWELTPP-22
Abbreviated titleWELTPP-22
CountryNetherlands
CityKerkrade
Period28/11/1929/11/19

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