Article
Physics, Applied
Hui Li, Chengxun Yuan, Anatoly Kudryavtsev, Aleksandr Astafiev, Evgeny Bogdanov, T. Yasar Katircioglu, Ismail Rafatov
Summary: This study investigates atmospheric pressure dielectric barrier discharges (DBDs) through numerical and experimental methods. Experimental measurements are made on the current and voltage of DBDs sustained in an argon flow in a coaxial discharge cell. Numerical models are based on drift-diffusion theory and different modeling approaches are implemented, considering electron kinetics based on Maxwellian electron energy distribution function (EEDF) as well as more realistic EEDF obtained from the solution of the electron Boltzmann equation, while also taking into account energy loss due to gas heating.
JOURNAL OF APPLIED PHYSICS
(2021)
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)
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, Applied
Anastasia S. Bil, Sergei E. Alexandrov, Alexander D. Breki, Alexander L. Shakhmin, Anastasia B. Speshilova
Summary: This study is the first to systematically investigate the microhardness, scratch resistance, and abrasion resistance of protective silica-like layers deposited on polycarbonate by atmospheric pressure plasma-enhanced chemical vapor deposition (AP PECVD) from tetraethoxysilane (TEOS) and hexamethyldisiloxane (HMDSO). The results show that the films deposited from HMDSO have a microhardness value that is almost three times higher than that of the films deposited from TEOS under similar conditions. The better mechanical properties of the films deposited from HMDSO are attributed to their lower carbon content and, possibly, the partial substitution of oxygen with carbon in the SiO2 matrix, leading to the formation of an oxycarbide structure.
PLASMA PROCESSES AND POLYMERS
(2023)
Article
Engineering, Chemical
Alexandre Perdrau, Noemi Barros, Rocio Rincon, Herve Glenat, Stephanie Truong, Sarra Gam Derouich, Xiaonan Sun, Philippe Decorse, Sophie Nowak, Beatrice Plujat, Souad Ammar, Jean-Pascal Borra, Fiorenza Fanelli, Francoise Massines
Summary: This study focuses on metal/polymer nanocomposite thin films made by atmospheric pressure Plasma-Enhanced Chemical Vapor Deposition. The presence of NH3 influences the salt reduction and thin film properties. Various characterization techniques are used to analyze the aerosol and nanocomposite thin films. The results show that NH3 decreases the salt reduction, affects the size, concentration, and composition of the embedded nanoparticles, and changes the plasmonic response of the thin films.
PLASMA CHEMISTRY AND PLASMA PROCESSING
(2023)
Article
Physics, Multidisciplinary
Feng Liu, Guihu Shi, Weiwei Wang, Zhihui Fan, Yun Wang, Jingquan Wang, Huimin Liang, Haiyan Han
Summary: This study investigates the effects of ground-electrode temperature on the electrical and optical characteristics of a coaxial dielectric barrier discharge. The results show that increasing the electrode temperature leads to a decrease in breakdown voltage and an increase in discharge pulses, transferred charges, and applied power. Furthermore, the electrode temperature also affects the capacitance and spectral intensity.
Article
Physics, Applied
Xu-Cheng Wang, Shu-Han Gao, Yuan-Tao Zhang
Summary: DBDs have been considered as potential candidates for in situ resource utilization of CO2 in the Martian atmosphere, and understanding the nonlinear behaviors in DBDs can enhance the ability to control the plasmas. This study investigates the temporal nonlinear behaviors in CO2 DBDs under Martian pressure by applying tailored sinusoidal voltages. The results show that the discharge evolves from period-one state to period-four state through period-two state, and the heavy ions of CO2+ and CO3- become dominant charged particles after the discharge is extinguished.
PLASMA PROCESSES AND POLYMERS
(2023)
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
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
Chemistry, Physical
Jumal Ibrahim, Sameer A. Al-Babtaineh, Samuel Cousens, Andrew Michelmore, Cormac Corr, Jason Whittle
Summary: This article investigates the discharge characteristics of an atmospheric pressure surface dielectric barrier discharge (SDBD) generated in helium and its ability to produce amine functionalised polymer coatings for cell therapy applications. The experimental results show that the plasma device is capable of generating glow-like discharge structures that are stable over the electrode area, and high electric fields around the mesh electrode. The surface characterisation of the coating revealed rich amine functionality, potentially suitable for cell adhesion and growth.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Analytical
Shuang Liu, Xin-Xin Xue, Yong-Liang Yu, Jian-Hua Wang
Summary: The use of miniaturized optical emission spectrometry devices and activated carbon electrode tips allows for rapid preconcentration and quantitative analysis of heavy metals in water, significantly enhancing sensitivity and practicality.
ANALYTICAL CHEMISTRY
(2021)
Article
Chemistry, Physical
Sen Li, Jiazhen Sun, Rui Sun, Jie Pan, Lin Wang, Chen Chen, Qiang Chen, Zhongwei Liu
Summary: In this study, the characteristics of radio frequency dielectric barrier discharge (RF-DBD) using argon doped with nitrogen at atmospheric pressure were investigated. It was found that the discharge changed from glow discharge to filamentous discharge as the voltage increased, with the morphology of the filaments depending on the nitrogen doping ratio.
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
Chemistry, Multidisciplinary
Sen Li, Jiazhen Sun, Rui Sun, Jie Pan, Lin Wang, Chen Chen, Qiang Chen, Zhongwei Liu
Summary: This paper investigates the radio frequency dielectric barrier discharge using argon at atmospheric pressure. It observed alpha mode and gamma mode discharges, and analyzed the luminescence intensity at different locations in the discharge gap. It was found that in gamma mode, the negative glow appears with a delay of 13 +/- 1 ns compared to the electron avalanche in alpha mode.
APPLIED SCIENCES-BASEL
(2021)
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)
