Article
Computer Science, Interdisciplinary Applications
Andrea Villa, Roger Schurch, Giacomo Buccella, Luca Barbieri, Christian Laurano, Roberto Malgesini, Daniele Palladini
Summary: Plasma simulation is becoming increasingly important in electrical engineering to replicate technically relevant configurations, such as the evolution of partial discharges. A proper numerical filter can address the challenges caused by high surface conductivity and greatly enhance the performance of simulation algorithms.
JOURNAL OF COMPUTATIONAL PHYSICS
(2022)
Article
Engineering, Multidisciplinary
Andrea Villa, Luca Barbieri, Roberto Malgesini, Giacomo Buccella
Summary: This paper aims to simulate plasma-solid interaction in real insulating components using first-principle partial differential equations. A filtering method is applied to allow the use of larger time steps in simulating realistic components. The novel theoretical analysis shows that the filter does not affect the accuracy of the method, as supported by significant numerical experiments.
APPLIED MATHEMATICAL MODELLING
(2021)
Article
Physics, Applied
Gizem D. D. Ozdemir, Utku K. K. Ercan, Ozan Karaman, Fatih Oltulu
Summary: This study investigates the efficacy of cold atmospheric plasma (CAP) in treating squamous cell carcinoma (SCC), a highly metastatic cancer. Results indicate that both direct and indirect CAP treatment selectively target SCC cells, inducing oxidative and nitrosative stress, leading to decreased metabolic activity and increased apoptosis. Furthermore, CAP treatment inhibits the metastatic behavior of cancer cells.
PLASMA PROCESSES AND POLYMERS
(2023)
Article
Computer Science, Interdisciplinary Applications
Andrea Villa, Roger Schurch, Luca Barbieri, Roberto Malgesini, Giacomo Buccella
Summary: The study of cold plasma is a highly active field of applied physics with a wide range of technical applications. Various models, including the local electric field approximation and the local mean energy approximation, have been considered. This research explores a new numerical scheme and tests its performance in different scenarios.
JOURNAL OF COMPUTATIONAL PHYSICS
(2021)
Article
Physics, Fluids & Plasmas
Min Jeong Seong, Yun Jeong Ha, Gun Hyeon Park, Sun Ja Kim, Hea Min Joh, T. H. Chung
Summary: This article presents a dielectric-barrier-discharge-based square unipolar microsecond-pulsed helium atmospheric pressure plasma jet (APPJ). A simplified equivalent circuit model and transferred charge measurement were used to characterize the APPJ. The effects of operational parameters on the performance of the plasma jet and the properties of liquid media treated by the plasma were investigated, and the correlation between plasma characteristics and properties of plasma-treated liquid was discussed.
PHYSICS OF PLASMAS
(2023)
Article
Physics, Fluids & Plasmas
K. Rasek, F. X. Bronold, H. Fehske
Summary: This study investigates the self-consistent ambipolar charge kinetics across a negatively biased semiconducting plasma-solid interface. By calculating and visualizing, the study shows that the current-voltage characteristic is influenced by the electron microphysics of the semiconductor, indicating that the perfect absorber model commonly used for plasma-solid interfaces cannot be maintained for semiconducting interfaces.
Article
Physics, Applied
Xu-Cheng Wang, Yuan-Tao Zhang
Summary: Non-thermal plasma technology is a promising solution for decomposing CO (2), and this study proposes a deep neural network (DNN) to describe the discharge characteristics and plasma chemistry of CO (2) pulsed discharge at atmospheric pressure. The DNN is trained using fluid model simulation data and shown to provide accurate results in a fraction of the time compared to traditional simulations. The DNN prediction results indicate the influence of pulse rise rate and plateau duration on discharge current, breakdown voltage, electric field, and product species density. Overall, this study demonstrates the reliability and potential of DNN-based methods in non-thermal plasma applications.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Mechanics
Zihao Zhu, Pau Fradera-Soler, William Jo, Feng Liu
Summary: Navier-Stokes computations were used to study the effects of dielectric barrier discharge (DBD) plasma actuators on flow past a square cylinder. It was found that the effectiveness of flow control by the plasma actuators varied with the location and input power of the actuators in different configurations. The best flow control effect was achieved in the last configuration where vortex shedding and drag were significantly reduced.
Article
Physics, Applied
Thomas von Woedtke, Guelsah Gabriel, Ulrich E. Schaible, Sander Bekeschus
Summary: The SARS-CoV-2 pandemic has highlighted the importance of effective hygiene and disinfection measures. The virus spreads efficiently through airborne transmission routes, releasing virus aerosols from the oral and nasopharyngeal cavities. In addition to the respiratory tract, viral replication has been found in the epithelium of these cavities. Plasma technology has emerged as a potential method to locally reduce viral loads and decrease patient infectivity, and we outline the conceptual ideas for such treatment in this review.
PLASMA PROCESSES AND POLYMERS
(2023)
Review
Physics, Applied
Jialin Liu, Lanlan Nie, Dawei Liu, Xinpei Lu
Summary: This paper provides an overview of the research in the field of nitrogen fixation (NF), discussing the main pathway for NO formation in N-2/O-2 mixtures and the involvement of N-2 in the Zeldovich mechanism. It also addresses the high energy consumption obstacle in plasma-assisted NF and the importance of understanding energy flow in the discharge process for improving NF energy efficiency. Furthermore, it discusses various new plasma NF devices reported in recent years.
PLASMA PROCESSES AND POLYMERS
(2023)
Article
Physics, Fluids & Plasmas
N. Yu Babaeva, G. Naidis
Summary: The study focuses on CO2 molecule conversion through electron impact dissociation, estimating efficiency using various dissociation cross sections. The best fit with experimental data for corona and dielectric-barrier discharges is found using Phelps' cross section for excitation of electronic states with an energy threshold of 10.5 eV under specific electric field conditions.
PLASMA SOURCES SCIENCE & TECHNOLOGY
(2021)
Article
Physics, Applied
Thijs van der Gaag, Atsushi Nezu, Hiroshi Akatsuka
Summary: Partial arbitrary electron energy distribution function (EEDF) results for cold atmospheric-pressure plasma were obtained using the visible bremsstrahlung inversion (VBI) method. Numerical EEDF of pure argon and helium-argon discharge datasets were reported, showing resemblance with a two-temperature Maxwell distribution. Measurements revealed the electron temperature and relative electron number density for bulk and high-energy electron populations. The VBI method allows the observation of arbitrary EEDF from optical emission spectroscopy (OES) measurement.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Xiaogang Sun, Pengtang Wang, Kenneth Davey, Yao Zheng, Shi-Zhang Qiao
Summary: A real-time tandem partial methane oxidation reaction (MOR) with cascaded plasma and electrocatalysis is reported for the first time, achieving activation and conversion of methane (CH4) synergistically. By using commercial Pd-based electrocatalysts, boosted CH4 conversion to value-added products is demonstrated. The mild condition, with anode potential < 1.0 V versus RHE, mitigates overoxidation of oxygenates and obviates competing reactions.
Article
Physics, Applied
Alina Begley, Giovanni Luca Bartolomeo, Daniel F. Abbott, Victor Mougel, Renato Zenobi
Summary: In this study, nitrogen was doped into monolayer graphene using reactive nitrogen species from a dielectric barrier discharge (DBD). The treated graphene monolayer showed a moderate degree of damage and an increase in N-atom (pyrrolic) and O-atom (mixed) content after 30 seconds of treatment. However, longer treatment times led to radial expansion of the treated area and destruction of the graphene. The N-atom content increased with increasing operating voltage of the DBD source. When only neutral reactive nitrogen species were used, the N-atom content and type remained unchanged. Based on these findings, it is hypothesized that neutrals such as N(S-4) and possibly N(P-2) are the primary reactive species resulting in pyrrolic N-doping from the DBD.
PLASMA PROCESSES AND POLYMERS
(2023)
Article
Physics, Applied
Feng Liu, Haijing Chu, Yue Zhuang, Zhi Fang, Renwu Zhou, Patrick J. Cullen, Kostya (Ken) Ostrikov
Summary: The uniformity and reactivity of DBDs can be improved by using customized nanosecond pulse excitation and precise addition of oxygen to the Ar flow. Increasing gap voltage U-g facilitates electron avalanches and improves discharge uniformity, while a small amount of added oxygen favors electron production.
JOURNAL OF APPLIED PHYSICS
(2021)
