Article
Physics, Applied
S. -J. Klose, R. Bansemer, R. Brandenburg, J. H. van Helden
Summary: The density of Ar(3P2) metastable in the effluent of the cold atmospheric pressure plasma jet kINPen was studied as a function of feed gas humidity and gas curtain composition. It was found that with the addition of water to the feed gas, the excitation dynamics changed, leading to a reduction in the production and lifetime of Ar(3P2), resulting in decreased density near the nozzle.
JOURNAL OF APPLIED PHYSICS
(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, Chemical
Zhitong Chen, Richard Obenchain, Richard E. Wirz
Summary: Researchers developed a single-electrode tiny plasma jet for clinical biomedical applications, studying the effect of voltage input and flow rate on the jet length and physical parameters. Interactions between the tiny plasma jet and different subjects showed an increase in ROS/RNS intensity as the distance decreased. These findings suggest the potential use of the tiny plasma jet device in clinical biomedical applications.
Article
Physics, Fluids & Plasmas
A. Sahlberg, J. Eriksson, S. Conroy, G. Ericsson, M. Nocente, Ye. O. Kazakov
Summary: This study investigates the spatial energy and density distributions of RF accelerated deuterons using the neutron camera system at the tokamak JET. A spectroscopic analysis method is presented to fit a spatially resolved model of the fast ion distribution to the pulse height spectra from 19 detectors simultaneously, providing quantitative information about the fast ion distribution resulting from different heating schemes.
Article
Physics, Multidisciplinary
S. -j. Klose, L. Kroes, J. H. van Helden
Summary: In this study, a time-efficient method using continuous-wave cavity ring-down spectroscopy at a wavelength of 8.12 μm was presented to determine the local distribution of gas phase H2O2 in the effluent of a cold atmospheric pressure plasma jet. The results showed that H2O2 is significantly generated within the plasma zone of the plasma jet. This work is an important step towards understanding the formation and consumption mechanisms of biomedically relevant species in the plasma zone and the effluent of a cold atmospheric pressure plasma jet.
FRONTIERS IN PHYSICS
(2023)
Article
Physics, Fluids & Plasmas
Yi Liu, Li Lin, Michael Keidar
Summary: This research discovers that electromagnetic emissions from cold atmospheric plasmas can cause cell membrane oscillations and increase sensitivity to the chemical active ingredients used in treatments. The study calculates the spatial distribution of electromagnetic emission power density spectrum from a cold atmospheric helium plasma jet, and identifies plasma oscillations as the main source of electromagnetic radiation.
PLASMA SOURCES SCIENCE & TECHNOLOGY
(2023)
Article
Physics, Applied
Jingkai Jiang, Peter J. Bruggeman
Summary: This study calibrated the absolute densities of cold ions in the afterglow region of an atmospheric pressure plasma jet, and found that positive ion densities were significantly lower than those of dominant reactive neutral species. The results demonstrate the capability of molecular beam mass spectrometry to quantitatively evaluate both neutral and ionic species in various applications using APPJs.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Physics, Fluids & Plasmas
Maik Budde, Luca Matteo Martini, Matteo Ceppelli, Sara Quercetti, Richard Engeln
Summary: Time-resolved absolute OH density measurements in a millisecond-pulsed DC glow discharge from carbon dioxide with water admixture were conducted using laser-induced fluorescence spectroscopy. A novel technique was used to calibrate the OH LIF setup and the time evolution of CO2 conversion and rotational temperature of OH were obtained.
PLASMA SOURCES SCIENCE & TECHNOLOGY
(2022)
Article
Physics, Fluids & Plasmas
Jingkai Jiang, Peter J. Bruggeman
Summary: This study utilized molecular beam mass spectrometry to characterize ion fluxes generated by a modulated radiofrequency-driven atmospheric pressure plasma jet in a homogeneous gas environment. The research investigated the influence of RF modulation frequency on ion fluxes and found significant differences in dynamics between positive and negative ions, highlighting the tremendous impact of memory effects on plasma propagation and pre-ionization.
PLASMA SOURCES SCIENCE & TECHNOLOGY
(2021)
Article
Engineering, Environmental
D. Vasu, Navaneetha K. Pandiyaraj, P. V. A. Padmanabhan, M. Pichumani, R. R. Deshmukh, S. K. Jaganathan
Summary: The discharge of large quantities of textile effluents is a major environmental issue, posing a threat to water bodies and groundwater quality. This study demonstrates that cold atmospheric pressure plasma is a promising method to efficiently treat textile effluents, leading to degradation of harmful substances and improvement of water quality.
ENVIRONMENTAL GEOCHEMISTRY AND HEALTH
(2021)
Article
Physics, Multidisciplinary
A. Boudjadar, F. Bouanaka, S. Rebiai
Summary: In this study, a 2D axisymmetric fluid model for an atmospheric pressure plasma jet driven by an 8 kV voltage pulse was investigated using COMSOL@ Multi-physics software. The results identified physical phenomena occurring in a cold plasma jet at atmospheric pressure with an argon pathway, providing a platform for future plasma jet applications.
Article
Biochemistry & Molecular Biology
Yun-Chien Cheng, Kuo-Wei Chang, Jian-Hua Pan, Chao-Yu Chen, Chung-Hsien Chou, Hsi-Feng Tu, Wan-Chun Li, Shu-Chun Lin
Summary: This study investigated the effects of cold atmospheric plasma (CAP) irradiation on oral squamous cell carcinoma (OSCC) and found that CAP irradiation can decrease cell viability by suppressing survival signals and oncogenic miRNA expression.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Physics, Applied
Jingkai Jiang, V. S. Santosh K. Kondeti, Gaurav Nayak, Peter J. Bruggeman
Summary: This study presents a detailed comparison between modeling and experimental results to elucidate the plasma chemistry in a humid atmospheric pressure plasma jet. It is found that there is a significant difference in the measured concentration of H due to boundary layer effects. Additionally, the model underestimates the concentration of H and O-2, and overestimates the concentration of H2O2. These findings provide insights into the H2O vapor chemistry in low-temperature plasmas.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Andrei Vasile Nastuta, Torsten Gerling
Summary: This study compares the performance of argon and helium in a cold atmospheric pressure plasma (CAP) system under different operation voltages and distances to the surface. It is found that the dissipated plasma power is similar for both gases, but the electrical field strength varies. Only argon shows measurable concentrations of ozone and nitrogen oxides. The surface temperature and leakage current of argon and helium also exhibit different trends.
APPLIED SCIENCES-BASEL
(2022)
Article
Physics, Fluids & Plasmas
Yusuke Nakagawa, Hikari Horibe, Atsushi Komuro, Ryo Ono
Summary: This study investigates the behavior of atomic oxygen in a 1 kHz-repetition pulsed plasma jet in atmospheric-pressure He/O2/H2O mixture. The results show that the main production mechanism of atomic oxygen is electron-impact dissociation and quenching of O(1D).
PLASMA SOURCES SCIENCE & TECHNOLOGY
(2022)
Review
Physics, Applied
Shinya Kumagai, Chikako Nishigori, Tetsuya Takeuchi, Peter Bruggeman, Keisuke Takashima, Hideki Takahashi, Toshiro Kaneko, Eun Ha Choi, Kazuo Nakazato, Makoto Kambara, Kenji Ishikawa
Summary: This review provides insight on state-of-the-art potential technologies for the prevention and prediction of infectious diseases, and surveys virus sterilization methods using ultraviolet light and low temperature plasma technologies. Researchers in various fields are facing challenges posed by infectious diseases, and advancements in nanomaterials and biomedical diagnostics are also evaluated.
JAPANESE JOURNAL OF APPLIED PHYSICS
(2022)
Article
Physics, Applied
Manikandan Suresh, V. S. Santosh K. Kondeti, Peter J. Bruggeman
Summary: The interaction between cold atmospheric pressure plasma jets and hydrogels has been used as a model system for studying the interaction between plasmas and tissues. In this study, the diffusion of reactive oxygen species, particularly H2O2, and the amount of plasma-produced H2O2 that penetrates into a gelatin hydrogel were analyzed. It was found that the diffusion constant of H2O2 in 10% gelatin hydrogel is similar to its diffusion constant in water, and the production of H2O2 in the hydrogel is significantly reduced compared to the production in distilled water under the same plasma operation conditions, suggesting that the scavenging of OH radicals at the plasma-gel interface greatly reduces H2O2 production.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Physics, Applied
Yudong Li, Jingkai Jiang, Michael Hinshelwood, Shiqiang Zhang, Peter J. Bruggeman, Gottlieb S. Oehrlein
Summary: This work investigated the mechanism of atmospheric pressure plasma jet (APPJ)-assisted methane oxidation. Analysis of gas phase, surface, and plasma-produced species revealed the essential role of oxygen atoms and observed a synergistic effect of 30%. Surface analysis of the catalyst showed the adsorption of CH (n) as an intermediate species, which subsequently transformed into surface CO. For a nickel catalyst at 500 degrees C, the dissociation of CH4 to CH (n) may be the rate-determining step in the plasma-assisted CH4 oxidation.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Physics, Applied
Jingkai Jiang, V. S. Santosh K. Kondeti, Gaurav Nayak, Peter J. Bruggeman
Summary: This study presents a detailed comparison between modeling and experimental results to elucidate the plasma chemistry in a humid atmospheric pressure plasma jet. It is found that there is a significant difference in the measured concentration of H due to boundary layer effects. Additionally, the model underestimates the concentration of H and O-2, and overestimates the concentration of H2O2. These findings provide insights into the H2O vapor chemistry in low-temperature plasmas.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Physics, Fluids & Plasmas
Yuanfu Yue, V. S. Santosh K. Kondeti, Nader Sadeghi, Peter J. Bruggeman
Summary: This work investigates the impact of the interaction between positive pulsed DC atmospheric pressure plasma jet with He-0.1% H2O mixture and liquid cathode on the plasma morphology and OH generation. The results show that plasma instabilities and enhanced evaporation have a significant influence on the OH generation. At higher plasma energies, the plasma contracts due to thermal instability, leading to a decrease in OH density in the core, while at lower plasma energies, the instability is suppressed by the equivalent series resistor of the liquid electrode.
PLASMA SOURCES SCIENCE & TECHNOLOGY
(2022)
Article
Physics, Applied
I Adamovich, S. Agarwal, E. Ahedo, L. L. Alves, S. Baalrud, N. Babaeva, A. Bogaerts, A. Bourdon, P. J. Bruggeman, C. Canal, E. H. Choi, S. Coulombe, Z. Donko, D. B. Graves, S. Hamaguchi, D. Hegemann, M. Hori, H-H Kim, G. M. W. Kroesen, M. J. Kushner, A. Laricchiuta, X. Li, T. E. Magin, S. Mededovic Thagard, V Miller, A. B. Murphy, G. S. Oehrlein, N. Puac, R. M. Sankaran, S. Samukawa, M. Shiratani, M. Simek, N. Tarasenko, K. Terashima, E. Thomas, J. Trieschmann, S. Tsikata, M. M. Turner, I. J. van der Walt, M. C. M. van de Sanden, T. von Woedtke
Summary: The 2022 Roadmap is a publication that aims to identify important challenges in the field of low-temperature plasma (LTP) physics and technology. It includes visions from 41 leading experts representing 21 countries and five continents, with a focus on new topics and areas of interest in the field. The roadmap is expected to contribute to the continued development of LTP science and technology in the next 5-10 years.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Physics, Applied
Urvashi Gangal, Stephen Exarhos, Tristan Contreras, Christopher C. Rich, Kay Dolan, Vincent Yang, Renee R. Frontiera, Peter Bruggeman
Summary: A radio frequency-driven atmospheric pressure plasma jet was used to perform a free radical polymerization of acrylamide in an aqueous solution. The simultaneous generation of nanoparticles catalyzed the polymerization reaction and increased the polymer yield by a factor of 2-30 times. The resulting polyacrylamide/silver nanocomposite hydrogels show potential as a novel biocompatible material.
PLASMA PROCESSES AND POLYMERS
(2022)
Article
Physics, Fluids & Plasmas
Tanubhav Srivastava, Marien Simeni Simeni, Gaurav Nayak, Peter J. Bruggeman
Summary: This study investigated self-organization at the plasma-liquid anode interface, revealing significant impacts of factors such as electrode gap distance, solute, and gas composition on pattern formation. A key underlying mechanism was proposed to explain all experimentally observed trends.
PLASMA SOURCES SCIENCE & TECHNOLOGY
(2022)
Article
Physics, Applied
Seshagiri R. Nandula, Vighneswara S. S. K. Kondeti, Chi Phan, Jianan Wang, Mitchell R. Penningroth, Jennifer L. Granick, Peter J. Bruggeman, Ryan C. Hunter
Summary: Microbial biofilms are resistant to antimicrobials, but cold atmospheric plasmas (CAP) show promise as a biofilm remediation strategy. This study evaluated the impact of treatment modality on biofilm inactivation and demonstrated the efficacy of CAP over conventional antimicrobials.
PLASMA PROCESSES AND POLYMERS
(2023)
Article
Physics, Fluids & Plasmas
Yuanfu Yue, Stephen Exarhos, Jaehyun Nam, Dongho Lee, Suljo Linic, Peter J. Bruggeman
Summary: This study reports on the interaction of a pulsed atmospheric pressure glow-like discharge with a liquid anode. The role of hydroxyl (OH) radicals and electrons in plasma-enabled redox chemistry in solution was investigated. The results show that the OH density near the liquid surface changes with increasing plasma power, leading to oxidation-reduction reactions in the liquid solution.
PLASMA SOURCES SCIENCE & TECHNOLOGY
(2022)
Article
Physics, Fluids & Plasmas
Yuanfu Yue, Peter J. Bruggeman
Summary: Plasma driven solution electrochemistry has attracted attention for various applications, including nanomaterial synthesis. This study investigated the electron density and temperature of a negative pulsed DC discharge in helium with N-2 shielding gas using Thomson scattering spectroscopy. The results showed stable radial plasma contraction and plasma-enhanced N-2 mixing. It was also observed that the plasma enhanced N-2 mixing significantly affected the plasma morphology and electron properties. The increase in electron temperature near the anode surface suggested the presence of hot electrons and their potential role in non-equilibrium electron-driven reactions in the liquid phase.
PLASMA SOURCES SCIENCE & TECHNOLOGY
(2022)
Article
Physics, Applied
Mackenzie Meyer, Gaurav Nayak, Peter J. Bruggeman, Mark J. Kushner
Summary: Plasmas in contact with liquids can degrade organic molecules through the solvation of reactive oxygen and nitrogen species. Immersing small droplets in the plasma can rapidly activate the liquid. The interaction between a glow discharge and a water droplet containing formate in the plasma was modeled using a global plasma chemistry model.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2023)
Article
Physics, Applied
Gaurav Nayak, Jianan Wang, Rui Li, Diana Aranzales, Selma Mededovic Thagard, Peter J. J. Bruggeman
Summary: Water microdroplets containing organic and fluorinated compounds were exposed to a radiofrequency glow discharge plasma, resulting in significant decomposition of formate and perfluorooctanoic acid, but no significant effect on triflic acid. In situ measurements confirmed that the conversion was independent of the OH flux to the droplet. Control experiments suggest that vacuum UV photons play a significant role in the decomposition process and can explain unexpected trends.
PLASMA PROCESSES AND POLYMERS
(2023)
Article
Physics, Fluids & Plasmas
Gaurav Nayak, Mackenzie Meyer, Gaku Oinuma, Mark J. Kushner, Peter J. Bruggeman
Summary: This paper investigates the charging of particles with diameters of tens of microns at atmospheric pressure, with a focus on ambipolar charging. The study of ambipolar charging in atmospheric pressure plasmas, specifically of droplets, has not been extensively explored. The activation of droplets in plasmas is of interest for various applications such as water purification, fertilizer production, and materials synthesis. The transport dynamics of water droplets through an atmospheric pressure radiofrequency glow discharge sustained in helium are studied. The differential charging of droplets in the plasma gradients of the bounding sheaths is found to be responsible for the transport dynamics.
PLASMA SOURCES SCIENCE & TECHNOLOGY
(2023)
Article
Physics, Fluids & Plasmas
Jianan Wang, Peter J. Bruggeman
Summary: The measurement of the OH density distribution on a fused silica substrate generated by an atmospheric pressure plasma jet in dry and humid helium is reported. The measured OH diffusive flux varied significantly for different experimental conditions, with a maximum value of 1.7 x 10(15) cm(-2) s(-1).
PLASMA SOURCES SCIENCE & TECHNOLOGY
(2023)
