Article
Chemistry, Multidisciplinary
Jacob Manzi, Ariel E. E. Weltner, Tony Varghese, Nicholas McKibben, Mia Busuladzic-Begic, David Estrada, Harish Subbaraman
Summary: This paper demonstrates the use of plasma-jet printing (PJP) to deposit thermoelectric nanoflakes onto flexible substrates at room temperature, with substantial improvements in material adhesion and flexibility observed. The printed films exhibit electrical conductivity of 2.5 x 10(3) S m(-1) and a power factor of 70 mu W m(-1) K-2 at room temperature. This advancement in plasma jet printing promotes not only the development of energy harvesting but also large-scale flexible electronics and sensors for space and commercial applications.
Article
Physics, Fluids & Plasmas
Laurent Invernizzi, Nader Sadeghi, Florent P. Sainct, Philippe Guillot
Summary: This work investigates the spatial variations of the helium He(2(3)S(1)) metastable atom densities in a plasma jet at atmospheric pressure. The radial profiles of He(2(3)S(1)) density along the plasma jet are deduced under different conditions. The influence of outlet tube diameter, gas flow rate, and electric field on the density distribution of the plasma jet is analyzed.
PLASMA SOURCES SCIENCE & TECHNOLOGY
(2022)
Article
Physics, Applied
J. Liu, L. Nie, Y. Xian, X. Lu
Summary: The study found that adding a small amount of nitrogen or oxygen to argon can make the plasma channel smooth, while the rotational frequency of the electrode does not affect the appearance of the plasma channel. Optical emission spectra show that adding O-2/N-2 reduces the emission intensity of transitions from excited argon levels to metastable states, leading to a transition of the discharge channel's nature.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Jia-Shiuan Tsai, Jian-Zhang Chen
Summary: This study investigated the impact of oxygen impurity on the inlet gas in a nitrogen atmospheric pressure plasma jet (APPJ). A numerical model was developed to simulate the nitrogen APPJ considering fluid dynamics, heat transfer, mass transfer, diffusion, and chemical reactions. Experimental tests were conducted to verify the plasma temperature characteristics on the treated surface. The findings revealed that the plasma temperature decreased with increasing oxygen impurity, affecting the excited and neutral species composition.
APPLIED SCIENCES-BASEL
(2023)
Article
Chemistry, Multidisciplinary
Julia Mrotzek, Wolfgang Vioel
Summary: The plasma effluent of cold plasma spray was characterized by optical emission spectroscopy, showing rotational temperatures around 4000K and excitation temperatures around 6000K. The gas flow rate had no influence on the spray.
APPLIED SCIENCES-BASEL
(2022)
Article
Physics, Applied
A. S. C. Nave, J. R. Wubs, J. H. van Helden
Summary: This study demonstrates the use of cavity ringdown spectroscopy to detect and quantify Ar-2* in the effluent of a cold atmospheric plasma jet. The density distribution of Ar-2* in the kINPen-Sci effluent was determined.
APPLIED PHYSICS LETTERS
(2023)
Article
Physics, Applied
David Steuer, Ihor Korolov, Sascha Chur, Julian Schulze, Volker Schulz-von der Gathen, Judith Golda, Marc Boeke
Summary: The study measured two-dimensional spatially resolved absolute atomic oxygen densities within an atmospheric pressure micro plasma jet and in its effluent. It was found that both the species formation behavior and the maximum distance between the jet nozzle and substrates for possible oxygen treatments of surfaces can be controlled by adjusting the gas flow.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Physics, Applied
K. Gazeli, M. Hadjicharalambous, Eleftherios Ioannou, O. Gazeli, C. Lazarou, C. Anastassiou, P. Svarnas, V. Vavourakis, G. E. Georghiou
Summary: We developed an in silico model to simulate the response of B16F10 melanoma cells to a helium atmospheric pressure plasma jet (APPJ) and doxorubicin drug (DOX). The simulation results showed that increasing plasma duration and DOX concentration resulted in increased cytotoxicity and a higher apoptosis probability compared to mitosis probability. Furthermore, combining plasma treatment and drug application enhanced cell cytotoxicity. This in silico model is valuable in the field of plasma medicine for understanding the response of different cancers to APPJ and cancer drugs.
APPLIED PHYSICS LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Ramona Huzum, Andrei Vasile Nastuta
Summary: Emerging plasma technologies at atmospheric pressure show promise in replacing old and expensive methods for wine treatment, with the potential for long-term storage, aging, and decontamination. Experimental results indicate that atmospheric pressure plasma treatment could be a viable option for winemaking, as supported by the correlation between plasma parameters and physico-chemical properties of wine products.
APPLIED SCIENCES-BASEL
(2021)
Article
Nanoscience & Nanotechnology
Nazli Turan, Mortaza Saeidi-Javash, Jiahao Chen, Minxiang Zeng, Yanliang Zhang, David B. Go
Summary: The passage discusses the application of atmospheric pressure nonthermal plasmas in sintering printed films, demonstrating the surface modifications achieved through nonthermal plasmas under ambient conditions. These results offer a new direction for future electronic device manufacturing, showcasing the potential of utilizing nonthermal plasmas for additive manufacturing on flexible and low-melting-point materials.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Physics, Applied
Alexandra Brisset, Andrew R. Gibson, Sandra Schroeter, Kari Niemi, Jean-Paul Booth, Timo Gans, Deborah O'Connell, Erik Wagenaars
Summary: This study investigates the impact of adding oxygen and water vapor to helium plasma on the density of OH, revealing that the addition of O-2 leads to a significant increase in atomic oxygen density. The simulations show that OH, O, and O-3 densities can be controlled relatively independently over a wide range of conditions through the addition of multiple gas admixtures.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Engineering, Multidisciplinary
Keita Shimada, Ryuki Morita, Masayoshi Mizutani, Tsunemoto Kuriyagawa
Summary: Powder jet deposition (PJD) is a spray coating method that can be done under atmospheric pressure and room temperature. By applying an atmospheric-pressure plasma jet (APPJ) assistance, the deposition rate of PJD can be increased.
PRECISION ENGINEERING-JOURNAL OF THE INTERNATIONAL SOCIETIES FOR PRECISION ENGINEERING AND NANOTECHNOLOGY
(2023)
Article
Chemistry, Physical
Youbin Seol, Minsu Choi, Hongyoung Chang, Shinjae You
Summary: In this study, the relationship between OH radical production and nanosecond pulse characteristics was investigated using optical emission spectroscopy. The results showed that longer pulses generated more OH radicals, which was confirmed by computational chemical simulations. The simulations also revealed that reaction time and N-2 metastable species played critical roles in OH radical generation in the nanosecond range. Additionally, humidity was found to affect the tendency of OH radical production, with shorter pulses being more advantageous in humid conditions.
Article
Chemistry, Multidisciplinary
Andrea Jurov, Spela Kos, Natasa Hojnik, Ivana Sremacki, Anton Nikiforov, Christophe Leys, Gregor Sersa, Uros Cvelbar
Summary: The study focused on the behavior of skin cells under a non-thermal plasma jet, revealing that direct plasma treatment could lead to low cell viability and induce apoptosis even with short treatment times. The research also highlighted the importance of upgrading and standardizing existing plasma treatment protocols, monitoring gas and liquid chemistries, and standardizing plasma discharge parameters for future research in the field.
APPLIED SCIENCES-BASEL
(2021)
Article
Physics, Applied
Li Wu, Xianyu Zhang, Tao Liu, Wencong Zhang, Junwu Tao, Fei Cheng
Summary: This Letter presents an atmospheric pressure low power microwave-induced air plasma source operating at 2.45 GHz. The device can self-ignite air and generate plasma with only 50 W microwave input power, without any additional trigger. Its sustaining power is as low as 10 W, and the gas temperature of plasma tail flame is about 32 degrees C measured by a fiber optic thermometer. Spectroscopic measurements revealed the presence of strong OH(A(2)S(+)? X-2?) bands at 306-310 nm and oxygen atomic lines O-I (3p5P? 3s5S) at 777.1 nm and O-I (3p3P?3s3S) at 844.6 nm. Furthermore, NO- ?(A(2)S(+)?X-2?(r)) from 200 to 300 nm was also detected in the air plasma jet. This portable plasma apparatus shows potential for air plasma applications in the biomedical fields.
APPLIED PHYSICS LETTERS
(2023)
Review
Physics, Fluids & Plasmas
Jan Benedikt, Holger Kersten, Alexander Piel
Summary: This article discusses the diagnostics of electrons and ions in plasmas and fluxes of charged and neutral species toward plasma-facing surfaces by non-optical methods, focusing on the fundamentals of common methods and their application to non-equilibrium low-pressure electropositive plasmas and ion beams. Various diagnostic tools and techniques are introduced, covering a range of topics including Langmuir probes, Faraday cups, mass spectrometry, and modern radio-frequency techniques.
PLASMA SOURCES SCIENCE & TECHNOLOGY
(2021)
Article
Energy & Fuels
Sadegh Askari, Davide Mariotti, Ruairi McGlynn, Jan Benedikt
Summary: The development of rechargeable zinc-air batteries is hindered by low energy-conversion efficiency and short cycle life, which are partly due to the unsatisfactory performance of the oxygen electrocatalysts. A paradigm is proposed for extending the active region using an enhanced 3D multiphase interface on the cathode, improving overall performance compared to conventional cathode counterparts.
Article
Physics, Applied
K. Sgonina, G. Bruno, S. Wyprich, K. Wende, J. Benedikt
Summary: The study used a remote atmospheric pressure plasma source with He/O-2 gas mixture to treat aqueous phenol solutions, finding that most of the atomic oxygen reactions with phenol take place at the liquid surface. This has important implications for the further development of plasma-liquid treatments involving atomic oxygen as a reactant.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Physics, Applied
Claire Douat, Pablo Escot Bocanegra, Sebastien Dozias, Eric Robert, Roberto Motterlini
Summary: This study introduces a new method for delivering carbon monoxide using a helium plasma jet with a CO2 admixture, showing potential therapeutic applications and the ability to tune CO production. It also reveals for the first time that plasma can generate and deliver CO for therapeutic interventions.
PLASMA PROCESSES AND POLYMERS
(2021)
Article
Physics, Applied
Oguz Han Asnaz, Niklas Kohlmann, Hauke Folger, Franko Greiner, Jan Benedikt
Summary: This study uses a parallel-plate, low-pressure plasma to grow hydrogenated amorphous carbon nanoparticles using an argon-acetylene gas mixture. The effects of prolonged treatment with noble gas and reactive gas mixtures on the particles are investigated, and their size and surface morphology are analyzed using scanning electron microscopy. The results indicate that prolonged treatment with argon leads to an increase in particle size and incorporation of oxygen from gas impurities, while the reactive gas mixtures cause etching of the nanoparticle material without exchange reactions between deuterium and hydrogen atoms.
PLASMA PROCESSES AND POLYMERS
(2022)
Article
Chemistry, Multidisciplinary
Thomas Maho, Raphaelle Binois, Fabienne Brule-Morabito, Maryvonne Demasure, Claire Douat, Sebastien Dozias, Pablo Escot Bocanegra, Isabelle Goard, Laurent Hocqueloux, Claire Le Helloco, Inna Orel, Jean-Michel Pouvesle, Thierry Prazuck, Augusto Stancampiano, Clement Tocaben, Eric Robert
Summary: The study assesses the use of non-thermal multi plasma jets for treating infected and chronic wounds in hospital centers, successfully demonstrating bacterial inactivation for various strains. This work contributes to the development of new therapies for nosocomial infections and chronic wounds.
APPLIED SCIENCES-BASEL
(2021)
Article
Chemistry, Physical
Sadegh Askari, Davide Mariotti, Paul Brunet, Alexander Vahl, Jan Benedikt
Summary: The hybrid Zn-air and Zn-M battery with Fe-doped Ni double hydroxide nanoflakes and activated carbon cathode material shows superior performance, high energy density, exceptional energy conversion efficiency, and outstanding power density. It also enables high-rate charging due to rapid redox reaction kinetics and excellent cathode materials catalytic activity.
MATERIALS TODAY ENERGY
(2021)
Article
Physics, Applied
Maren Dworschak, Niklas Kohlmann, Filip Matejka, Pavel Galar, Lorenz Kienle, Jan Schaefer, Jan Benedikt
Summary: The HelixJet plasma source was utilized to synthesize silicon nanoparticles (Si-NPs) operating under atmospheric pressure. By adjusting the operational parameters, Si-NPs with different sizes, crystallinity, structure, and photoluminescence properties were achieved. The addition of H-2 and high RF powers led to the formation of crystalline nanoparticles with strong photoluminescence intensity, which could be tuned by controlling the synthesis parameters. Post-synthesis annealing allowed for the synthesis of large crystalline nanoparticles. The study also involved design improvements for the HelixJet plasma source, enhancing its stability and enabling continuous long-term operation.
PLASMA PROCESSES AND POLYMERS
(2023)
Article
Physics, Fluids & Plasmas
C. Schulze, Z. Donko, J. Benedikt
Summary: A new method is presented for determining surface coefficients through energy-selective mass spectrometry measurements and numerical simulations, analyzing the bimodal peak structure in the ion flux-energy distribution function in a symmetric capacitively coupled plasma. The method allows for simultaneous determination of effective ion-induced secondary electron yield and effective elastic electron reflection coefficient under realistic plasma conditions, with good agreement to literature data.
PLASMA SOURCES SCIENCE & TECHNOLOGY
(2022)
Article
Physics, Applied
T. Winzer, D. Steuer, S. Schuettler, N. Blosczyk, J. Benedikt, J. Golda
Summary: This paper reports on a new type of plasma jet, called the capillary-jet, which can operate stably at high input powers and extends the accessible parameter range. The study results show that the discharge of the capillary-jet is similar to the well-studied COST-Jet, and most of the power is dissipated into the heating of the plasma feed gas.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Oguz Han Asnaz, Jonas Drewes, Marie Elis, Thomas Strunskus, Franko Greiner, Oleksandr Polonskyi, Franz Faupel, Lorenz Kienle, Alexander Vahl, Jan Benedikt
Summary: A novel combined setup of a Haberland type gas aggregation source and a secondary radio frequency discharge is used to generate, confine, and coat nanoparticles over much longer time scales than traditional in-flight treatment. The process is precisely monitored using localized surface plasmon resonance and Fourier-transform infrared spectroscopy as in situ diagnostics. Surface coating is shown to occur in two phases: first, singular seeds appear on the particle surface which then grow to cover the entire particle surface over 3 to 5 minutes.
NANOSCALE ADVANCES
(2023)
Article
Optics
T. A. Hahn, J. Benedikt, H. Kersten
Summary: The absolute densities of O and O-3 in the effluent of a kINPen are measured using molecular beam mass spectrometry. The use of a nitrogen gas curtain and different gas mixtures ensure stable conditions and higher densities of reactive species are generated when operated in argon. A new molecular beam chopper design has also been successfully tested in the setup.
EUROPEAN PHYSICAL JOURNAL D
(2023)
Article
Chemistry, Physical
He Li, Sadegh Askari, Jihao Wang, Niklas Wolff, Malte Behrens, Lorenz Kienle, Jan Benedikt
Summary: A noble-metal-free bifunctional electrocatalyst was developed through a facile strategy for rechargeable zinc-air batteries. The nitrogen-doped NiCo2O4 nanostructures on carbon paper exhibited enhanced electrocatalytic activities for oxygen evolution and reduction reactions. The plasma treatment optimized the N doping process without changing the morphology and specific surface area of the catalyst. The resulting air cathode showed improved stability and performance compared to noble-metal catalyst counterparts.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Physics, Fluids & Plasmas
C. Douat, S. Ponduri, T. Boumans, O. Guaitella, S. Welzel, E. Carbone, R. Engeln
Summary: This study investigates the dissociation of CO2 in a symmetric pin-to-pin dielectric barrier discharge (DBD). The number of filaments per half cycle follows a power-law as a function of the injected power and remains constant regardless of pressure or other process parameters. The CO2 conversion is found to be proportional to specific energy input (SEI) even at the single filament level.
PLASMA SOURCES SCIENCE & TECHNOLOGY
(2023)
Article
Physics, Fluids & Plasmas
Christian Schulze, He Li, Leonie Mohn, Martin Muller, Jan Benedikt
Summary: This study proposes a new plasma reactor chamber that allows for measurements of ion flux-energy distribution functions at high sheath potential. By adjusting the electrode geometry and diluting the working gas, the ion flux and ion energy can be controlled. This setup opens up possibilities for studying the effects of ion treatment on various substrates.
