A5020909263- Plasma Applications and Diagnostics
- Plasma Diagnostics and Applications
- Electrohydrodynamics and Fluid Dynamics
- Catalytic Processes in Materials Science
- Laser-induced spectroscopy and plasma
- Aerosol Filtration and Electrostatic Precipitation
- Surface Modification and Superhydrophobicity
- Laser Design and Applications
- Dust and Plasma Wave Phenomena
- Spectroscopy and Laser Applications
- Gas Sensing Nanomaterials and Sensors
- Mass Spectrometry Techniques and Applications
- Plasma and Flow Control in Aerodynamics
- Fluid Dynamics Simulations and Interactions
- Electrocatalysts for Energy Conversion
- Ammonia Synthesis and Nitrogen Reduction
- Gold and Silver Nanoparticles Synthesis and Applications
- Fluid Dynamics and Heat Transfer
- Power Transformer Diagnostics and Insulation
- Microbial Inactivation Methods
- Model Reduction and Neural Networks
- nanoparticles nucleation surface interactions
- Lattice Boltzmann Simulation Studies
- Gas Dynamics and Kinetic Theory
- Ionosphere and magnetosphere dynamics
University of Minnesota
2016-2025
Twin Cities Orthopedics
2014-2022
University of Minnesota System
2014-2021
John Wiley & Sons (Germany)
2018-2020
University of Maryland, College Park
2019-2020
Xi'an Jiaotong University
2020
Minneapolis Institute of Arts
2017
Eindhoven University of Technology
2009-2015
Plasma (Russia)
2009-2014
Ghent University
2006-2010
During the last two decades atmospheric (or high) pressure non-thermal plasmas in and contact with liquids have received a lot of attention view their considerable environmental medical applications.The simultaneous generation intense UV radiation, shock waves active radicals makes these discharges particularly suitable for decontamination, sterilization purification purposes.This paper reviews current status research on liquids.The emphasis is mechanisms physical characteristics.
Journal of Physics D: Applied published the first Plasma Roadmap in 2012 consisting individual perspectives 16 leading experts various sub-fields low temperature plasma science and technology. The 2017 is update a planned series periodic updates Roadmap. continuously growing interdisciplinary nature field its equally broad range applications are making it increasingly difficult to identify major challenges that encompass all many applications. This intellectual diversity ultimately strength...
Abstract Low-temperature plasma physics and technology are diverse interdisciplinary fields. The parameters can span many orders of magnitude applications found in quite different areas daily life industrial production. As a consequence, the trends research, science difficult to follow it is not easy identify major challenges field their sub-fields. Even for experts road future sometimes lost mist. Journal Physics D: Applied addressing this need clarity thus providing guidance by special...
A detailed global model of atmospheric-pressure He + H2O plasmas is presented in this paper. The incorporates 46 species and 577 reactions. Based on simulation results obtained with comprehensive model, the main reactions are identified, simplified models capable capturing physicochemical processes discharges suggested. accuracy quantified assessed for changes water concentration, input power electrode configuration. Simplified can reduce number by a factor ∼10 while providing that within...
Abstract The 2022 Roadmap is the next update in series of Plasma Roadmaps published by Journal Physics D with intent to identify important outstanding challenges field low-temperature plasma (LTP) physics and technology. format same as previous representing visions 41 leading experts 21 countries five continents various sub-fields LTP science In recognition evolution field, several new topics have been introduced or given more prominence. These emphasis highlight increased interests...
A radio-frequency atmospheric pressure argon plasma jet is used for the inactivation of bacteria (Pseudomonas aeruginosa) in solutions. The source characterized by measurements power dissipation, gas temperature, absolute UV irradiance as well mass spectrometry emitted ions. plasma-induced liquid chemistry studied performing ion chromatography and hydrogen peroxide concentration on treated distilled water samples. Additionally, a quantitative estimation an extensive induced made solution...
Non-equilibrium plasmas have been intensively studied over the past century in context of material processing, environmental remediation, ozone generation, excimer lamps and plasma display panels. Research on atmospheric pressure non-equilibrium intensified last two decades leading to a large variety sources that developed for an extended application range including chemical conversion, medicine, analysis disinfection. The fundamental understanding these discharges is emerging but there...
A set of diagnostic methods to obtain the plasma parameters including power dissipation, gas temperature and electron density is evaluated for an atmospheric pressure helium or argon radio frequency (RF) needle biomedical applications operated in open air. The more less constant equal 1.3 × 109 W m−3. Different are investigated temperature. In this paper temperatures obtained by rotational spectra OH(A–X) (B–X) compared with Rayleigh scattering measurements line broadening hydrogen emission...
In this paper radical production in atmospheric pressure water containing plasmas is discussed. As OH often an important these discharges the focuses on production.
The mechanism of interaction cold nonequilibrium plasma jets with mammalian cells in physiologic liquid is reported. major biological active species produced by an argon RF jet responsible for cell viability reduction are analyzed experimental results obtained through physical, biological, and chemical diagnostics. This complemented kinetics modeling the source to assess dominant reactive gas phase species. Different chemistries changing feed composition based from argon, humidified (0.27%),...
This review summarizes the state of art plasma diagnostics on atmospheric pressure plasmas formed at characteristic length scales approximately 1 mm or smaller and identifies challenges prospects. Both generated in confined geometries, so-called microplasmas, as well discharge filaments occurring commonly filamentary plasmas, e.g. microdischarges dielectric barrier discharges are covered. In spite differences between microplasmas which often obtain a quasi steady-state single self-limited...
Laser scattering provides a very direct method for measuring the local densities and temperatures inside plasma. We present new experimental results of laser on an argon atmospheric pressure microwave plasma jet operating in air environment. The is small so high spatial resolution required to study effect penetration molecules into signal has three overlapping contributions: Rayleigh from heavy particles, Thomson free electrons Raman molecules. filtered out optically with triple grating...
Dc-excited discharges generated in water at the tip of a tungsten wire which is located orifice quartz capillary are investigated by time-averaged optical emission spectroscopy.
Electrical and optical emission properties of non-equilibrium atmospheric air discharges between a metal pin tap water anode/cathode are presented. With anode the glow type as is derived from short-exposure time plasma imaging electrical characteristics. Additionally, validity extrapolated scaling laws low pressure discharge supports these findings.In case cathode filamentary in nature at surface. In anode, diffuse down to 10 ns. The timescales on which filaments visible near region...
Abstract The main species and chemical processes in low‐temperature atmospheric‐pressure He + O 2 plasmas are identified using a comprehensive global model. simulation results highlight the significance of Penning at low oxygen concentration, increasingly important role electron attachment as concentration increases. With increasing energy dissipation shifts from elastic collisions with to dissociative excitation molecules, large ions ( ${\rm O}_{3}^{ } $ , O}_{4}^{ ) become dominant charged...
In this contribution, optical emission spectroscopy is evaluated and thoroughly analysed as a diagnostic to characterize plasmas in contact with liquids. One of the specific properties liquids strong OH(A–X) hydrogen lines. As an example 600 ns pulsed dc excited discharge Ar, He O2 bubbles water investigated by time resolved spectroscopy. It shown that production processes species plasma kinetics strongly influence spectrum. This complicates interpretation spectra but provides opportunity...
Electrical and optical emission properties of a burning plasma between liquid cathode metal anode are presented in this paper. The has constricted contact points at the is clearly filamentary nature near water surface.The voltage drop depends on conductivity rather than pH significantly different for distilled electrolyte solutions. An acidification due to always observed.The rotational temperature OH N2 bulk is, respectively, range 3200?3750?K 2500?2750?K. nitrogen typically two times...
In this paper it is shown that electronic quenching of OH(A) by water prevents thermalization the rotational population distribution OH(A). This means observed ro-vibrational OH(A–X) emission band (at least partially) an image formation process and determined not only gas temperature. The negative ions clusters for larger concentrations can contribute to non-equilibrium. above demonstrated in RF excited atmospheric pressure glow discharges He–water mixtures a parallel metal plate reactor...
Abstract In this contribution, nanosecond pulsed discharges in N 2 and /0.9% H O at atmospheric pressure (at 300 K) are studied with time-resolved imaging, optical emission spectroscopy Rayleigh scattering. A 170 ns high-voltage pulse is applied across two pin-shaped electrodes a frequency of 1 kHz. The discharge consists three phases: an ignition phase, spark phase recombination phase. During the mainly caused by molecular nitrogen (N ( C – B )). atomic observed. when added very similar,...