Ultraviolet excimer radiation from nonequilibrium gas discharges and its application in photophysics, photochemistry and photobiology

Kogelschatz, U.

doi:10.1364/jot.79.000484

Cited by 46 publications

(33 citation statements)

References 100 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Vapors of the aromatic compounds were generated from a glass vial and collected by a stream of zero air (1.1 L min −1 ) via a glass capillary for liquid compounds (and from a flask flushed with the same stream of zero air for solid compounds). To generate OH free radicals, zero air (7 L min −1 ) was passed through a Nafion humidifier (Perma Pure) fed with ultrapure water and was then irradiated by an excimer lamp at 172 nm (7.2 eV) (Kogelschatz, 1990(Kogelschatz, , 2012Salvermoser et al, 2008). The Xe excimer lamp consists of a tubular quartz cell which surrounds a quartz flow tube (outer diameter 10 mm) (Bartels-Rausch et al, 2011).…”

Section: Flow Tubementioning

confidence: 99%

Formation of highly oxygenated organic molecules from aromatic compounds

et al. 2018

View full text Add to dashboard Cite

Abstract. Anthropogenic volatile organic compounds (AVOCs) often dominate the urban atmosphere and consist to a large degree of aromatic hydrocarbons (ArHCs), such as benzene, toluene, xylenes, and trimethylbenzenes, e.g., from the handling and combustion of fuels. These compounds are important precursors for the formation of secondary organic aerosol. Here we show that the oxidation of aromatics with OH leads to a subsequent autoxidation chain reaction forming highly oxygenated molecules (HOMs) with an O : C ratio of up to 1.09. This is exemplified for five single-ring ArHCs (benzene, toluene, o-/m-/p-xylene, mesitylene (1,3,5-trimethylbenzene) and ethylbenzene), as well as two conjugated polycyclic ArHCs (naphthalene and biphenyl). We report the elemental composition of the HOMs and show the differences in the oxidation patterns of these ArHCs. A potential pathway for the formation of these HOMs from aromatics is presented and discussed. We hypothesize that AVOCs may contribute substantially to new particle formation events that have been detected in urban areas.

show abstract

Section: Flow Tubementioning

confidence: 99%

Formation of highly oxygenated organic molecules from aromatic compounds

et al. 2018

View full text Add to dashboard Cite

show abstract

“…Creation of new optical radiationsources, including excimer (or exciplex), that are important in modern science and technology requires the studies of optical emission and parameters of the working media of such sources [1][2][3].Plasma in the mixtures of mercury diiodidevapor with atomic and molecular gases is an efficientexciplex source of coherent and spontaneous emission in the violet-blue range of the spectrum with a maximum emission at wavelengths λ max. = 441.4, 443, 444, 445 nm [4][5][6][7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Optical Emission of Atmospheric - Pressure Dielectric Barrier Discharge Plasma on Mercury Diiodide/Rare Gases Mixtures

Малинина¹,

Шуаибов²,

Malinin³

2017

IOSR JAP

View full text Add to dashboard Cite

“…Progress into the basic science as well as some applications in the first 10 years was summarized in a few reviews [2][3][4][5][6][7]. The latter review [7] also discussed transient, filamentary plasmas.…”

mentioning

confidence: 99%

“…A number of reviews focused on selected areas of microplasma applications [8][9][10][11][12][13]. The development of excimer lamps with emissions in the VUV was one of the first application-oriented developments using microplasmas [7]. The same basic mechanism, three-body reactions, forms the basis for microplasmabased ozone generators [14].…”

mentioning

confidence: 99%

Microplasmas, a platform technology for a plethora of plasma applications

Becker

2017

Eur. Phys. J. Spec. Top.

View full text Add to dashboard Cite

Publications describing microplasmas, which are commonly defined as plasmas with at least one dimension in the submillimeter range, began to appear to the scientific literature about 20 years ago. As discussed in a recent review by Schoenbach and Becker [1], interest and activities in basic microplasma research as well as in the use of microplasma for a variety of application has increased significatly over the past 20 years. The number of papers devoted to basic microplasma science increased by an order of magnitude between 1995 and 2015, a count that excludes publications dealing exclusively with technological applications of microplasmas, where the microplasma is used solely as a tool. In reference [1], the authors limited the topical coverage largely to the status of microplasma science and our understanding of the physics principles that enable microplasma operation and further stated that the rapid proliferation of microplasma applications made it impossible to cover both basic microplasma science and their application in a single review article.Some microplasmas are thermal in nature, where the gas temperature is far above the room temperature and is approaching the electron temperature. Another group of microplasmas is nonthermal (also referred to as nonequilibrium or "cold"), with gas temperatures much below electron temperatures. Their electron energy distribution contains a tail of high energy electrons, which causes high excitation, ionization, and dissociation rates. Research into nonthermal microplasmas has enjoyed an enormous growth in the past two decades. These plasmas are particularly attractive for a plethora of applications because they can be operated stably at high gas pressures, in rare gases as well as in molecular gases and gas mixtures, operated in a direct current (dc) mode as well as in pulsed dc and alternate current (ac) modes. Modeling and improved diagnostics have allowed us in the past decade to gain more insight into the specific properties of nonthermal micro-plasmas. Electron densities exceeding 10 16 cm −3 have been measured in pulsed microplasmas [1]. Gas temperatures, on the other hand, can be close to room temperature at low currents in rare gases and generally reach not more than 2000 K in atmospheric-pressure air microplasmas. With discharge voltages of a few hundred volts, and current densities on the order of a

show abstract

Ultraviolet excimer radiation from nonequilibrium gas discharges and its application in photophysics, photochemistry and photobiology

Cited by 46 publications

References 100 publications

Formation of highly oxygenated organic molecules from aromatic compounds

Formation of highly oxygenated organic molecules from aromatic compounds

Optical Emission of Atmospheric - Pressure Dielectric Barrier Discharge Plasma on Mercury Diiodide/Rare Gases Mixtures

Microplasmas, a platform technology for a plethora of plasma applications

Contact Info

Product

Resources

About