Article
Food Science & Technology
Xuetong Fan, Bryan T. Vinyard, Yuanyuan Song
Summary: This study evaluated the effects of H2O2 concentration, treatment time, and dwell time on the efficacy of cold plasma-activated hydrogen peroxide aerosols against bacteria on tomato surfaces. Results showed that H2O2 concentration and treatment time were the main factors affecting the efficacy.
Article
Chemistry, Analytical
Gengliang Liu, Fukun Shi, Qun Wang, Zhiqiang Zhang, Jinsong Guo, Jie Zhuang
Summary: This study investigated the penetration effect of the kINPen plasma jet using a novel 3D agar-entrapped bacteria model. The results showed that the kINPen had a dose-dependent inhibitory effect on bacterial growth in the 3D model, and this effect was closely related to the long-lived active species produced by the plasma jet. Short-lived reactive species, electric fields, UV light, and electrons were also found to play a significant role in bacteria inactivation. The 3D agar-entrapped bacteria model was shown to be a more objective and sensitive tool for evaluating the penetration effect of the kINPen compared to the potassium iodide-starch model.
MICROCHEMICAL JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Ku Youn Baik, Hyun Jo, Se Hoon Ki, Gi-Chung Kwon, Guangsup Cho
Summary: The efficiency of simultaneous treatment of cold atmospheric pressure plasma jet (CAP) and hydrogen peroxide (H2O2) was studied for bacterial disinfection. The combination of CAP with H2O2 showed dramatic synergistic effects in killing bacteria by enhancing reactive species transportation and intracellular oxidation. The non-toxic byproducts of CAP and H2O2 make their combination a promising candidate for clinical applications.
APPLIED SCIENCES-BASEL
(2023)
Article
Biochemistry & Molecular Biology
Dennis Feibel, Judith Golda, Julian Held, Peter Awakowicz, Volker von der Gathen, Christoph V. Suschek, Christian Oplaender, Florian Jansen
Summary: By adjusting the gas flow, the micro-scaled Atmospheric Pressure Plasma Jet (mu APPJ) can produce different levels of reactive oxygen or nitrogen species (ROS or RNS), leading to varying effects on buffers and human skin fibroblasts (hsFB). The toxicity of CAP treatment on hsFB is correlated with the accumulated H2O2 concentration.
Article
Biochemistry & Molecular Biology
Maho Yagi-Utsumi, Tomohiro Tanaka, Yoko Otsubo, Akira Yamashita, Shinji Yoshimura, Motohiro Nishida, Koichi Kato
Summary: The study reveals that cold atmospheric plasma can affect the amyloidogenic protein Aβ associated with Alzheimer's disease by selectively oxidizing certain amino acid residues, inhibiting its fibril formation. This provides insights into potential novel applications of CAP.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Article
Materials Science, Coatings & Films
Vikas Rathore, Sudhir Kumar Nema
Summary: This study discusses the selective generation of reactive oxygen species (ROS) in plasma-activated water (PAW) using pure CO2 as a plasma-forming gas. A detailed comparison of gas species/radicals in plasma and the properties of PAW generated with CO2 and air is presented. The results show that PAW (CO2) has a higher pH, lower oxidizing potential, and lower electrical conductivity compared to PAW (air). The species formed in PAW (CO2) include dissolved O-3, H2O2, dissolved CO2, CO 3 2 - ions, etc. The concentration of NO 2 - and NO 3 - ions in PAW (CO2) goes beyond the detection limit. Moreover, PAW (CO2) has a significantly higher concentration of H2O2 than PAW (air), and increasing the plasma treatment time with water increases the H2O2 and dissolved O-3 concentration in PAW (CO2).
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A
(2023)
Article
Biotechnology & Applied Microbiology
Yuanyuan Song, Xuetong Fan
Summary: The study showed that levels of H2O2 residue on fresh produce surfaces decomposed rapidly after treatment with iHP and did not pose a safety concern after 1 day of storage.
JOURNAL OF FOOD PROTECTION
(2021)
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
Engineering, Electrical & Electronic
YiQian Li, JiaLin Liu, Feng Zhao, Ke Song, LanLan Nie, DaWei Liu, XinPei Lu
Summary: Ethanol solution is widely used as a disinfectant, but only has significant bactericidal capability at a volume fraction of around 70%-75%. Higher concentrations are irritating while lower concentrations are less effective. This study proposes a plasma-activated low-concentration ethanol solution (PAES) as a green, efficient and less irritating disinfectant.
Article
Nanoscience & Nanotechnology
G. Veda Prakash, Narayan Behera, Kiran Patel, Ajai Kumar
Summary: This article provides a concise methodology for the development and characterization of a cold atmospheric pressure plasma jet, focusing on optimizing parameters for biological and industrial applications. The use of simple diagnostics and the impact of factors like gas flow rate and applied voltage on stable plasma jet formation are discussed. Optical techniques for characterizing plasma parameters are also highlighted in a simple manner for various applications.
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
Chemistry, Analytical
Fanny Girard-Sahun, Pauline Lefrancois, Vasilica Badets, Stephane Arbault, Franck Clement
Summary: This study aims to detect the in situ production of reactive oxygen and nitrogen species (RONS), specifically superoxide anion (O-2(center dot-)), in aqueous buffer solutions exposed to cold atmospheric plasmas (CAPs). The production and accumulation of RONS in the liquids were found to depend on the plasma composition, with N-2-based shieldings providing the highest concentrations of superoxide. The study provides valuable insights into the interactions between CAPs and physiological solutions for biomedical applications.
ANALYTICAL CHEMISTRY
(2022)
Article
Materials Science, Biomaterials
Gang Wu, Bao Jiang, Lin Zhou, Ao Wang, Shaohua Wei
Summary: The study utilizes activated carbon nanoparticles (ANs) derived from coconut shell to exhibit peroxidase-mimic nanoenzyme activity for chemodynamic therapy (CDT) in cancer treatment. The PANs also show efficient photothermal conversion efficiency for photothermal therapy (PTT), with heating effect enhancing peroxidase-mimic activity, achieving a synergistic PTT-CDT therapeutic outcome. Additionally, Gd@PANs can be used for T1-magnetic resonance imaging (MRI) of tumors, integrating treatment and diagnosis.
JOURNAL OF MATERIALS CHEMISTRY B
(2021)
Article
Physics, Applied
Nishtha Gaur, Hirofumi Kurita, Jun-Seok Oh, Saki Miyachika, Masafumi Ito, Akira Mizuno, Allison J. Cowin, Sarah Allinson, Robert D. Short, Endre J. Szili
Summary: The study investigates the potential role of hydroxyl radicals in cold atmospheric plasma (CAP) jet treatment, showing correlation between CAP jet-induced DNA damage and the presence of hydroxyl radicals. A 'plasma screen' based on a hydrogel film is demonstrated to significantly reduce DNA damage while facilitating the delivery of hydrogen peroxide, which could be beneficial for applications focusing on DNA damage such as cancer treatment, as well as in situations where DNA damage should be minimized, such as open-wound treatment and dermatology.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
Zhitong Chen, Guojun Chen, Richard Obenchain, Rui Zhang, Fan Bai, Tianxu Fang, Hanwen Wang, Yingjie Lu, Richard E. Wirz, Zhen Gu
Summary: This article introduces the delivery methods of cold atmospheric plasma (CAP) in biomedical applications, such as sterilization, wound healing, and cancer therapy. It also presents the future research needs in this field, providing insights for researchers from various disciplines.
Article
Physics, Applied
John J. Lowke, Endre J. Szili
Summary: An unresolved issue in lightning physics is how lightning proceeds to the ground and the structure of the dark column connecting the streamer step with the cloud. It is proposed that these processes can be explained by the accumulation of excited oxygen molecules. Calculations support this explanation.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2023)
Article
Engineering, Biomedical
Ihn Han, In-Seok Song, Seung Ah Choi, Taebok Lee, Maksudbek Yusupov, Priyanka Shaw, Annemie Bogaerts, Eun Ha Choi, Jae Jun Ryu
Summary: This study proposes the use of low-dose nonthermal biocompatible dielectric barrier discharge plasma (DBD-NBP) on human gingival fibroblasts (HGFs) to enhance wound healing. The treatment inhibits colony formation but not cell death and induces cell migration through ECM degradation and MMP expression. The study also explores the effect of oxidation on the stability and conformation of FAK's catalytic kinase domain (KD).
ADVANCED HEALTHCARE MATERIALS
(2023)
Article
Radiology, Nuclear Medicine & Medical Imaging
Nishtha Gaur, Robert D. Short, Sarah L. Allinson
Summary: We propose a novel plasma treatment regime called plasma fractionation, which divides a single dose of plasma into multiple small dosages and administers them to cells in vitro. Our study shows that plasma fractionation produces lower levels of cell death compared to a single plasma treatment, highlighting its potential as a safer method for plasma-based cancer treatment. We also demonstrate that the squamous cell carcinoma line (A431) is more sensitive to a single acute plasma treatment than the immortalized keratinocyte line (HaCaT), suggesting the importance of other shorter-lived plasma components.
IEEE TRANSACTIONS ON RADIATION AND PLASMA MEDICAL SCIENCES
(2023)
Article
Nanoscience & Nanotechnology
Nishtha Gaur, Bethany L. Patenall, Bhagirath Ghimire, Naing T. Thet, Jordan E. Gardiner, Krystal E. Le Doare, Gordon Ramage, Bryn Short, Rachel A. Heylen, Craig Williams, Robert D. Short, Toby A. Jenkins
Summary: We introduce a versatile drug-loaded composite hydrogel that can simultaneously deliver a drug and CAP-generated molecules in a tissue target when activated by an argon-based cold atmospheric plasma jet. We demonstrated this concept by encapsulating gentamicin in sodium polyacrylate particles dispersed within a poly(vinyl alcohol) hydrogel matrix. The resulting gentamicin-PAA-PVA composite hydrogel can release gentamicin and effectively eradicate bacteria, including those in planktonic state and biofilm, when activated by CAP. The concept of the composite hydrogel can also be applied to other antimicrobial agents like cetrimide and silver, and activated by any dielectric barrier discharge CAP device.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Engineering, Environmental
So Yeon Yoon, Min Ji Kim, Hye Won Kim, Seon Hwa Lim, Choe Earn Choong, Sang-Eun Oh, Jung Rae Kim, Yeomin Yoon, Jae young Choi, Eun Ha Choi, Min Jang
Summary: The aim of this study was to investigate the effects of hydrophilic sulfur-modified nanoscale zero-valent iron (S-nZVI) as a biocatalyst for denitrification. The researchers found that the denitrifying bacteria Cupriavidus necator promote Fe corrosion during biocatalytic denitrification, resulting in a higher synergistic factor for S-nZVI compared to nanoscale zero-valent iron. Kinetic profiles showed that the preferred electron acceptor for biocatalytic denitrification using S-nZVI and C. necator was SO42-, and up-flow column experiments demonstrated a high nitrogen removal capacity using S-nZVI for 127 days. Microbiome taxonomic profiling revealed that the addition of S-nZVI promoted the growth of specific microbes that can enhance denitrification.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Plant Sciences
Azadeh Barjasteh, Pradeep Lamichhane, Zohreh Dehghani, Neha Kaushik, Ravi Gupta, Eun Ha Choi, Nagendra Kumar Kaushik
Summary: Seed germination is a complex process initiated by water uptake, and plasma treatment has emerged as an efficient method to promote germination. Plasma treatment increases the hydrophilicity and oxygen permeability of seed coats, while reactive oxygen- and nitrogen-enriched plasma-activated water induces hormonal changes in seeds to promote germination and plant growth. However, the molecular mechanism and germination behavior induced by plasma treatment still need further understanding and clarification. This review examines the effects of plasma treatment on sterilization, storage, seed shape variation, watering, and genetic and hormonal alterations to improve plant productivity.
JOURNAL OF PLANT GROWTH REGULATION
(2023)
Article
Polymer Science
Hanaa A. Galeb, Jonas Eichhorn, Sam Harley, Alexander J. Robson, Laurine Martocq, Steven J. Nicholson, Mark D. Ashton, Hend A. M. Abdelmohsen, Emel Pelit, Sara J. Baldock, Nathan R. Halcovitch, Benjamin J. Robinson, Felix H. Schacher, Victor Chechik, Koen Vercruysse, Adam M. Taylor, John G. Hardy
Summary: This study compares the properties of conjugated polymers derived from different phenolic monomers (catechol, levodopa, and homogentisic acid) using analytical chemistry techniques to understand their structure-function relationships. The polymers exhibit measurable conductivity and their electronic properties can be adjusted by functional groups on the polymer backbones, indicating their potential for electronic device applications.
MACROMOLECULAR CHEMISTRY AND PHYSICS
(2023)
Article
Food Science & Technology
Min Gyu Song, So Hee Kim, Eun Bi Jeon, Kwang Soo Ha, Sung Rae Cho, Yeoun Joong Jung, Eun Ha Choi, Jun Sup Lim, Jinsung Choi, Shin Young Park
Summary: This study found that the duration of FE-DBD plasma treatment can effectively reduce the levels of HNoV GII.4 and V. parahaemolyticus in sea squirts, thus minimizing the risk of infection.
Article
Physics, Multidisciplinary
Asad Ur Rehman, Amir Muhammad Afzal, Muhammad Waqas Iqbal, Saikh Mohammad Wabaidur, Essam A. Al-Ammar, Sohail Mumtaz, Eun Ha Choi, Muhammad Ali
Summary: In this research, polyaniline (PANI) was used to enhance the electrochemical capabilities of silver-zinc sulfide (AgZnS). The PANI was synthesized via polymerization of aniline, while the AgZnS was synthesized hydrothermally. Adding 50% PANI in AgZnS resulted in an excellent specific capacity (Q(s)) of 1121.6 Cg(-1). The assembled supercapattery device with 50% PANI exhibited a highest Q(s) of 223.44 Cg(-1), along with a tremendous energy density of 49.65 Wh kg(-1) at a power density of 795.33 W kg(-1).
Article
Energy & Fuels
Asad Ur Rehman, Amir Muhammad Afzal, Muhammad Waqas Iqbal, Muhammad Ali, Saikh Mohammad Wabaidur, Essam A. Al-Ammar, Sohail Mumtaz, Eun Ha Choi
Summary: Transition metal dichalcogenides (TMDs) are excellent candidates for energy storage applications due to their 2D structure and electrochemical features. However, their poor stability limits their potential as supercapattery electrode materials. In this study, tungsten disulfide (WS2) nanosheets were combined with hydrothermally synthesized silver zinc sulfide (AgZnS) nanostructures to create a hybrid electrode material with superior charge transfer and active redox sites. The AgZnS@WS2 hybrid electrode exhibited a high specific capacity and excellent electrochemical performance, making it suitable for industrial applications as a supercapattery electrode material.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Chemistry, Physical
Min Ji Kim, Kien Tiek Wong, Minhee Kim, Choe Earn Choong, In Wook Nah, Yeomin Yoon, Eun Ha Choi, Min Jang
Summary: In this study, CeO2 with varying concentrations of oxygen vacancies (Ov) was prepared and the effects of Ov concentration and photoinduced electron transfer (PET) on O3 activation in visible-light-driven photocatalytic-ozonation (PO) for oxalic acid (OA) removal were investigated. The formation of Ov reduced the bandgap of CeO2 and created a region with low adsorption energy barrier for O3 around the Ce atom. Notably, there was no distinct linear correlation between Ov concentration and VLD-PO activity. CeO2 with a lower Ov amount exhibited better PET and higher photoexcited electron density, suggesting the crucial role of PET properties in Ov regeneration and O3 activation for OA removal. The electric energy per order (EEO) for VLD-PO using CeOx(7 0 0) was 6.94 kWh m 3 order 1. Bioassay experiments and continuous-flow experiments (CFEs) demonstrated the effectiveness of VLD-PO in treating toxic and refractory micropollutants in water. The findings of this study can promote the application of PO systems for water treatment.
APPLIED SURFACE SCIENCE
(2023)
Article
Engineering, Environmental
Shaik Abdul Munnaf, Min Jang, Eun Ha Choi
Summary: In this study, non-thermal plasma was used along with synthesized nano-particles to remove inorganic and organic compounds, achieving environmental safety. Plasma-generated reactive species were employed for oxidation and reduction processes. The maximum concentrations of H2O2 and NOx were found in deionized water. The removal capacity for arsenic was determined as 4.69 mg/g. The study also demonstrated the catalytic enhancement of synthesized nanoparticles in the removal of organic compounds. The results showed the potential of this eco-friendly method for pollutant removal and the recycling of waste material.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Review
Green & Sustainable Science & Technology
Pradeep Lamichhane, Nima Pourali, Lauren Scott, Nam N. Tran, Liangliang Lin, Marc Escriba Gelonch, Evgeny V. Rebrov, Volker Hessel
Summary: This perspective explores the green synthesis of ethylene using plasma technology. The performance, sustainability, and comparison with conventional and alternative methods are evaluated. The importance of considering environmental, social, and governance factors in business decisions is emphasized, and plasma technology is highlighted as a potentially promising approach for green ethylene synthesis.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2024)
Article
Physics, Fluids & Plasmas
Shunya Hashimoto, Hideo Fukuhara, Endre J. Szili, Chiaki Kawada, Sung-Ha Hong, Yuta Matsumoto, Tatsuru Shirafuji, Masayuki Tsuda, Atsushi Kurabayashi, Mutsuo Furihata, Hiroshi Furuta, Akimitsu Hatta, Keiji Inoue, Jun-Seok Oh
Summary: Low-temperature atmospheric-pressure plasma jets are generally considered safe in medical treatments, but recent studies have shown that they can cause skin burns under certain conditions. This study identifies joule heating as the cause of the burns and suggests that increasing treatment distance can mitigate these effects while retaining the beneficial properties of plasma treatment.
Article
Chemistry, Multidisciplinary
Kai-Cheng Yan, Jordan E. E. Gardiner, Adam C. C. Sedgwick, Naing Thet, Rachel A. A. Heylen, Tony D. D. James, A. Toby A. Jenkins, Xiao-Peng He
Summary: A new fluorescent probe was developed to determine the NTR activity of different bacterial species under various growth conditions, which can be applied in complex clinical environments with high sensitivity and detection accuracy for both planktonic cultures and biofilms.
CHEMICAL COMMUNICATIONS
(2023)