Article
Engineering, Chemical
Mohammad Kazemi, Hamed Taghvaei
Summary: Efficient and economical methods for water recovery are in high demand due to recent water crisis caused by growing water demands. Cold atmospheric plasma technology has attracted attention for its chemical and physical effects in removing contaminants from wastewater. Experimental results with multi array dielectric barrier discharge (MADBD) plasma gas diffuser show that ozone (O-3) plays a key role in decolorization of water, with high efficiency and decolorization rate.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Physics, Applied
Kazuki Takeda, Shota Sasaki, Wencheng Luo, Keisuke Takashima, Toshiro Kaneko
Summary: The development of a high-speed liquid flow interface in helium plasma has enabled the observation of rapid decay of OH radicals generated by atmospheric-pressure plasmas, providing insights into their surface localization and inhomogeneous distribution. This experimental breakthrough offers a better understanding of reaction processes involving short-lived reactive species in the liquid phase.
APPLIED PHYSICS EXPRESS
(2021)
Article
Physics, Applied
V. S. Santosh K. Kondeti, Peter J. Bruggeman
Summary: This paper investigates the gas-liquid interfacial dynamics during the impingement of an argon radio frequency driven atmospheric pressure plasma jet (APPJ), showing that the dynamics of the dimples generated are influenced by various factors. The observed dimple oscillations can enhance the decomposition efficiency of crystal violet by enhancing liquid phase convection, leading to potential applications in enhancing plasma-induced liquid phase chemistry and reactivity.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Engineering, Environmental
Yang Li, Shitong Han, Zhanguo Li, Zhen Liu, Longhui Liang, Keping Yan, Anna Zhu
Summary: By using atmospheric pressure plasma jet to decontaminate 2-Chloroethyl ethyl sulfide, the chemical pollutant can be completely removed in a relatively short time with reduced toxicity. Helium APPJ was more effective, generating more .OH and slowly raising the skin surface temperature to 30.4 degrees Celsius within 15 minutes without causing damage.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Physics, Fluids & Plasmas
Kaishu Nitta, Hitoshi Muneoka, Yoshiki Shimizu, Hiromichi Kobayashi, Kazuo Terashima, Tsuyohito Ito
Summary: Atmospheric-pressure nonequilibrium plasma processing using microdroplets has garnered attention in recent years. Understanding the evaporation behavior of droplets in plasma is crucial for improving process controllability. This study investigates the evaporation of controlled inkjet droplets in atmospheric-pressure nonequilibrium argon plasma through experiments and modeling. Comparing the droplet evaporation model, which considers gas temperature, electron and ion collisions, and recombination reactions, with experimental results, it is found that droplet evaporation is enhanced in high-density plasma with electron and ion densities exceeding 10(19) m(-3) compared to non-ionized gaseous environments at gas temperatures under 1000 K.
PLASMA SOURCES SCIENCE & TECHNOLOGY
(2023)
Article
Physics, Applied
Naoki Shirai, Takuma Kaneko, Yuto Takamura, Koichi Sasaki
Summary: Measuring surface tension is an effective method for real-time examination of the plasma-liquid interface. The variation in surface tension is correlated with the behavior of OH radicals in the gas phase.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
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
Physics, Fluids & Plasmas
H. N. McQuaid, D. Rutherford, D. Mariotti, P. D. Maguire
Summary: We have developed a gas-based OH generation source using a low power radio frequency driven plasma. This source delivers OH radicals away from interference and has been found to vary with H2O vapour content and absorbed power density. The OH flux generated has been compared to traditional OH generation techniques and shows promising results for various scientific and technological applications.
PLASMA SOURCES SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Chao Li, Yu Huang, Xiao Zhang, Yuanhui Zhao, Yang Huo
Summary: This study systematically investigated the oxidation kinetics and toxicity of three liquid crystal monomers in the atmosphere, revealing their atmospheric persistence and long-range transport potential, as well as the enhanced toxicity of transformation products compared to the parent compounds. This research provides valuable insights for the regulation and safe application of liquid crystal monomers.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2021)
Article
Physics, Fluids & Plasmas
Tymon B. Nieduzak, Visal Veng, Cameron N. Prees, Valentin D. Boutrouche, Juan Pablo Trelles
Summary: This study presents a reactor that utilizes plasma activated water produced through renewable energy to synthesize nitrate fertilizer. Experimental results show that the nitrate production rate varies linearly with plasma volume. The design and fabrication methods presented can be adapted to other reactors, enabling low environmental and economic cost nitrogen fertilizer production on demand.
PLASMA SOURCES SCIENCE & TECHNOLOGY
(2022)
Article
Physics, Fluids & Plasmas
Xiaochun Xue, Lei Huang, Yonggang Yu, Yi Liu
Summary: This study experimentally investigates the interface instability and expansion mechanism of a thermal plasma jet. It provides a better understanding of the complex fluid-dynamic interactions occurring on the surface of the plasma bubble due to the Kelvin-Helmholtz effect. The study utilizes a plasma generator, pressure measurement system, and high-speed camera system to trace the development processes of the plasma interface. The results show that the plasma jet initially has a better advantage of radial expansion, but over time, the axial expansion velocity exceeds the radial expansion velocity, resulting in a torch-shaped jet body. Turbulent mixing and energy dissipation lead to the breaking of the jet boundary and the occurrence of local rupture phenomena on the plasma surface.
PHYSICS OF PLASMAS
(2023)
Article
Engineering, Environmental
Jiao Lin, Jishen Zhang, Renwu Zhou, Li Guo, Dingxin Liu, Mingzhe Rong, Michael G. Kong, Kostya (Ken) Ostrikov
Summary: Pathogenic microorganisms pose a global threat to public health and environment. Electrolyzed oxidizing water (EOW) is a promising environment-friendly alternative disinfectant, but its production processes and mechanisms are unclear. This study presents an effective hybrid plasma electrochemical EOW production process and reveals the mechanisms by combining nonthermal plasmas and a two-chamber electrochemical cell separated by a cation exchange membrane (CEM). The study also explores the antibacterial ability of EOW produced under different conditions.
Article
Physics, Applied
Shota Sasaki, Shion Osana, Takahiro Kubota, Mutsuo Yamaya, Hidekazu Nishimura, Ryoichi Nagatomi, Toshiro Kaneko
Summary: The recent global COVID-19 pandemic has led to a high demand for an effective virus inactivation method. This study evaluated the potential and mechanism of human coronavirus inactivation using atmospheric pressure plasma (APP) technology. The results showed that a 30-second exposure to APP significantly reduced the HCoV-229E titers, indicating strong virus-inactivation efficacy. It was found that the production of reactive oxygen and nitrogen species (RONS), particularly O-2 (center dot-), played a crucial role in the inactivation process. These findings provide new insights into a more efficient method for inactivating human coronaviruses using APPs.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Multidisciplinary Sciences
Colleen B. Baublitz, Arlene M. Fiore, Sarah M. Ludwig, Julie M. Nicely, Glenn M. Wolfe, Roisin Commane, Michael J. Prather, Daniel C. Anderson, Gustavo Correa, Bryan N. Duncan, Melanie Follette- Cook, Daniel M. Westervelt, Ilann Bourgeois, William H. Brune, T. Paul Bui, Joshua P. Digangi, Glenn S. Diskin, Samuel R. Hall, Kathryn Mckain, David O. Miller, Jeff Peischl, Alexander B. Thames, Chelsea R. Thompson, Kirk Ullmann, Steven C. Wofsy
Summary: ProxyOH is developed as an observation-based proxy for spatial variations in hydroxyl radical (OH) in the remote marine troposphere. It scales linearly with in situ [OH] spatial variations and can be used to map OH variations over a large area.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2023)
Article
Physics, Fluids & Plasmas
Renze Yu, Zhaoyuan Liu, Jiao Lin, Xinyi He, Linsheng Liu, Qing Xiong, Qiang Chen, Kostya (Ken) Ostrikov
Summary: The study found that in DC plasma-liquid systems, the production of H2O2aq is 8-12 times higher when the liquid acts as a cathode compared to when it acts as an anode. Additionally, the rate of conversion from gaseous OH radicals to H2O2aq is 4-6 times greater when the liquid is a cathode.
PLASMA SCIENCE & TECHNOLOGY
(2021)
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
Food Science & Technology
Fan Bu, Samira Feyzi, Gaurav Nayak, Qingqing Mao, V. S. Santosh K. Kondeti, Peter Bruggeman, Chi Chen, Baraem P. Ismail
Summary: This study evaluated the impact of three different cold atmospheric plasma (CAP) sources, atmospheric pressure plasma jet (APPJ), two dimension dielectric barrier discharge (2D-DBD), and nanosecond pulsed discharge (ns-pulsed), on the structure, functionality, and amino acid composition of pea protein. The plasma treatments resulted in protein denaturation, increased surface hydrophobicity, formation of soluble aggregates mainly through disulfide linkages, and changes in secondary structures. Improved surface properties, presence of soluble aggregates, and increased beta-sheet content contributed to enhanced gelation and emulsification. Significant improvement in emulsion stability was attributed to smaller droplet sizes and higher surface charge. The differences among CAP-treated samples were due to variations in plasma fluence and composition of reactive species. While all three plasma treatments showed appreciable functionalization effects, 30 min 2D-DBD (Ar + O2) treatment had negligible impact on the amino acid composition.
INNOVATIVE FOOD SCIENCE & EMERGING TECHNOLOGIES
(2023)
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)