Special Issue Editors

Dr. Katharina Stapelmann
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Guest Editor

Department of Nuclear Engineering, North Carolina State University, Raleigh, NC 27605, USA
Interests: plasma diagnostics; plasma chemistry; plasma–liquid interaction; plasma–cell interaction; plasma for life science applications; plasma cancer treatment

Dr. Savino Longo
E-Mail Website

SciProfiles

Guest Editor

Department of Chemistry, University of Bari “Aldo Moro”, Via Orabona 4, 70126 Bari, Italy
Interests: numerical modeling; chemical kinetics; kinetic theory; hydrogen plasmas; electric discharges; astrochemistry

Dr. Pietro Ranieri
E-Mail Website

SciProfiles

Guest Editor

Department of Nuclear Engineering, North Carolina State University, Raleigh, NC 27605, USA
Interests: nonthermal plasma; plasma medicine; plasma agriculture; plasma-liquid interface; plasma chemistry; Raman spectroscopy; pulsed dielectric barrier discharge chemistry

Special Issue Information

Dear Colleagues,

Dielectric barrier discharges (DBD) have been investigated for more than a century and were mainly used for ozone production until applications like plasma medicine and plasma-assisted conversion and catalysis sparked new interest. The rise of nanosecond-pulse generators for the generation of plasma has made it possible to deliver voltage pulses on the same time scale as the streamer lifetime in a DBD. This Special Issue focusses on DBDs from nanosecond to microsecond pulses, with an emphasis on the following topics:

Diagnostics
Physics and diagnostics of nanosecond pulsed DBDs
Self-organization in DBDs
Applications of DBDs: plasma medicine, plasma-assisted conversion and catalysis, and plasma agriculture
DBDs in contact with liquids: experiment and simulation

Dr. Katharina Stapelmann
Dr. Savino Longo
Dr. Pietro Ranieri
Guest Editors

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Published Papers (3 papers)

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Research

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Open AccessArticle

Parametric Studies of a Mercury-Free DBD Lamp

and

Plasma 2021, 4(1), 82-93; https://doi.org/10.3390/plasma4010006 - 04 Feb 2021

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Abstract

Mercury discharge lamps are often used because of their high efficiency; however, the usage of mercury lamps will be restricted or forbidden for safety and environmental purposes. Finding alternative solutions to suppress mercury is of major interest. The aim of this work is to increase the luminous efficacy of a commercial-free mercury flat dielectric barrier discharge lamp (Planilum, St Gobain) in order to reach the necessary conditions for the lamp to be used as a daily lighting source. The lamp is made of two glass plates separated by a gap of 2 mm. The gap is filled by a neon xenon mixture. The external electrodes made of transparent ITO (indium tin oxide) are deposited on the lamp glass plates. The electrical signal applied to the electrodes generates a UV-emitting plasma inside the gap. Phosphors deposited on the glass allow the production of visible light. The original electrode geometry is plane-to-plane; this induces filamentary discharges. We show that changing the plane-to-plane geometry to a coplanar geometry allows the plasma to spread all over the electrode surface, and we can reach twice the efficacy of the lamp (32 lm/W) as compared to the original value. Using this new electrode geometrical configuration and changing the electrical signal from sinusoidal to a pulsed signal greatly improves the visual uniformity of the emitted light all over the lamp. Electrical and optical parametric measurements were performed to study the lamp characteristics. We show that it is possible to develop a free mercury lamp with an efficacy compatible with lighting purposes. Full article

(This article belongs to the Special Issue Dielectric Barrier Discharges)

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Open AccessArticle

Polymerization of Solid-State Aminophenol to Polyaniline Derivative Using a Dielectric Barrier Discharge Plasma

and

Plasma 2020, 3(4), 187-195; https://doi.org/10.3390/plasma3040014 - 30 Oct 2020

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Abstract

We present a method to prepare polyaminophenol from solid-state aminophenol monomers using atmospheric dielectric barrier discharge (DBD) plasma. The polymerizations of o-aminophenol and m-aminophenol are studied. The polymers were analyzed via Fourier-Transform inferred spectroscopy (FTIR) and ultraviolet-visible (UV-vis) spectroscopy. The kinetics of the polymerization reactions were investigated by using UV-vis and the polymerization was found to be first-order for both o-aminophenol and m-aminophenol. The resulting polymer film exhibits a conductivity of 1.0 × 10⁻⁵ S/m for poly-o-aminophenol (PoAP) and 2.3 × 10⁻⁵ S/m for poly-m-aminophenol (PmAP), which are two orders more conductive than undoped (~10⁻⁷ S/m) polyaniline (PANI), The PoAP has a quinoid structure and the PmAP has an open ring keto-derivative structure. The process provides a simple method of preparing conductive polyaminophenol films. Full article

(This article belongs to the Special Issue Dielectric Barrier Discharges)

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Review

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Open AccessReview

The Resistive Barrier Discharge: A Brief Review of the Device and Its Biomedical Applications

Mounir Laroussi

Plasma 2021, 4(1), 75-80; https://doi.org/10.3390/plasma4010004 - 28 Jan 2021

Viewed by 670

Abstract

This paper reviews the principles behind the design and operation of the resistive barrier discharge, a low temperature plasma source that operates at atmospheric pressure. One of the advantages of this plasma source is that it can be operated using either DC or AC high voltages. Plasma generated by the resistive barrier discharge has been used to efficiently inactivate pathogenic microorganisms and to destroy cancer cells. These biomedical applications of low temperature plasma are of great interest because in recent times bacteria developed increased resistance to antibiotics and because present cancer therapies often are accompanied by serious side effects. Low temperature plasma, such the one generated by the resistive barrier discharge, is a technology that can help overcome these healthcare challenges. Full article

(This article belongs to the Special Issue Dielectric Barrier Discharges)

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