Article
Multidisciplinary Sciences
Jungwoo Shin, Geethal Amila Gamage, Zhiwei Ding, Ke Chen, Fei Tian, Xin Qian, Jiawei Zhou, Hwijong Lee, Jianshi Zhou, Li Shi, Thanh Nguyen, Fei Han, Mingda Li, David Broido, Aaron Schmidt, Zhifeng Ren, Gang Chen
Summary: Semiconductors with high thermal conductivity and electron-hole mobility are crucial for electronic and photonic devices as well as for fundamental studies. Cubic boron arsenide (c-BAs), with its ultrahigh thermal conductivity and ambipolar mobility, shows promise as a candidate material for next-generation electronics.
Article
Chemistry, Multidisciplinary
Jacob Manzi, Ariel E. E. Weltner, Tony Varghese, Nicholas McKibben, Mia Busuladzic-Begic, David Estrada, Harish Subbaraman
Summary: This paper demonstrates the use of plasma-jet printing (PJP) to deposit thermoelectric nanoflakes onto flexible substrates at room temperature, with substantial improvements in material adhesion and flexibility observed. The printed films exhibit electrical conductivity of 2.5 x 10(3) S m(-1) and a power factor of 70 mu W m(-1) K-2 at room temperature. This advancement in plasma jet printing promotes not only the development of energy harvesting but also large-scale flexible electronics and sensors for space and commercial applications.
Article
Physics, Applied
Nanya Zhong, Gang Fu, Junjun Li, Chen Lian, Wenqi Chen, Kama Huang
Summary: A novel two-dimensional atmospheric pressure plasma jet device is proposed and validated through analysis of plasma parameters and establishment of an experimental system.
PLASMA PROCESSES AND POLYMERS
(2022)
Article
Metallurgy & Metallurgical Engineering
Kenta Nakazawa, Tatsuki Ohashi, Shotaro Saiki, Shoichi Kikuchi
Summary: The method of hardening AZ31 magnesium alloy using an atmospheric-pressure plasma jet at room temperature by exciting oxygen and nitrogen molecules to form an oxynitrided layer has been developed. This promising approach enhances the hardness of magnesium alloys without the need for heat treatment.
JOURNAL OF MAGNESIUM AND ALLOYS
(2022)
Article
Metallurgy & Metallurgical Engineering
Kenta Nakazawa, Tatsuki Ohashi, Shotaro Saiki, Shoichi Kikuchi
Summary: Surface-hardening treatment for AZ31 magnesium alloy was achieved using an atmospheric-pressure plasma jet at room temperature, resulting in the formation of an oxynitrided layer and oxygen and nitrogen diffusion layer, which increased the hardness of the alloy. This method is a promising approach for locally hardening magnesium alloys without the need for heat treatment.
JOURNAL OF MAGNESIUM AND ALLOYS
(2022)
Article
Instruments & Instrumentation
P. W. Shi, Z. C. Yang, Z. B. Shi, L. F. Xu, W. C. Deng, M. Jiang, W. Chen, W. L. Zhong, J. Wen, K. R. Fang, R. H. Tong, G. Q. Xue, X. Yu, Y. G. Li, X. Q. Ji, Y. P. Zhang, Q. W. Yang, M. Xu, Z. X. Wang, X. R. Duan
Summary: A solid state terahertz interferometer has been successfully developed on the HL-2M tokamak, working in a wide frequency range with the use of phase locking and frequency multiplying technique. The phase processor based on FPGA technology enables real-time display of electron density, and a novel numerical algorithm written on the FPGA chip allows extraction of phase information without interference. This interferometer achieves precise measurement of electron density and low frequency tearing mode in plasma diagnosis.
REVIEW OF SCIENTIFIC INSTRUMENTS
(2021)
Article
Chemistry, Multidisciplinary
Elias Abedelnour, Stephanie Ognier, Mengxue Zhang, Laurent Schio, Olivier Venier, Janine Cossy, Michael Tatoulian
Summary: The direct N-acylation of amines by esters in a microreactor using argon plasma is presented, resulting in high yields of amides.
CHEMICAL COMMUNICATIONS
(2022)
Article
Physics, Fluids & Plasmas
Wameedh Adress, Bill Graham
Summary: An experimental diagnostic method based on nanosecond-intensified charged coupled device camera and optical emission spectroscopy (OES) is proposed to observe the interfacial region between plasma plume and liquid surfaces, simulating the eradication of bacterial biofilms using non thermal atmospheric pressure plasma jets. The study reveals changes in plasma discharge dynamics when interacting with different targets.
PLASMA SOURCES SCIENCE & TECHNOLOGY
(2021)
Article
Physics, Fluids & Plasmas
Joshua Morsell, Duncan Trosan, Katharina Stapelmann, Steven Shannon
Summary: The study of plasma surface ionization waves (SIWs) has mainly focused on planar surfaces and periodic structures in recent years. However, in practical applications, substrates often have non-planar morphology and targets may have heterogeneous composition, which fall under the category of complex interfaces. This study investigates plasma SIWs incident on a complex target consisting of a single channel cut into glass slides. The velocities of the SIWs in the channel portion and the radially propagating portion were tracked. The results show that the surface wave velocities are primarily affected by pulse energy rather than channel geometry. The study also discusses the morphology of surface waves and their impact on applications, and introduces a simple model to understand the mechanisms behind SIW escape from channels.
PLASMA SOURCES SCIENCE & TECHNOLOGY
(2023)
Article
Physics, Applied
J. Liu, L. Nie, Y. Xian, X. Lu
Summary: The study found that adding a small amount of nitrogen or oxygen to argon can make the plasma channel smooth, while the rotational frequency of the electrode does not affect the appearance of the plasma channel. Optical emission spectra show that adding O-2/N-2 reduces the emission intensity of transitions from excited argon levels to metastable states, leading to a transition of the discharge channel's nature.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Physics, Fluids & Plasmas
Ian E. Ochs, Vadim R. Munirov, Nathaniel J. Fisch
Summary: Advanced aneutronic fusion fuels, such as proton-Boron(11), require higher temperatures than conventional fuels. In mirror confinement systems, relativistic effects must be considered due to the escape of tail electrons. By matching higher temperatures with nonrelativistic solutions, accurate forms for confinement time and relativistic effects are obtained.
PHYSICS OF PLASMAS
(2023)
Article
Physics, Applied
Fan Wu, JiaYin Li, YuBin Xian, Xiao Tan, XinPei Lu
Summary: A new strategy was reported in this study to restrain the stray light in Thomson scattering for diagnostic of spatiotemporal distribution of the electron density and temperature of atmospheric pressure plasma jets. Experiments showed a donut-shaped distribution of electron density, with radius decreasing with reduction of gas flow rate, and a similar time relationship between electron density and plasma emission intensity. Higher applied voltage led to faster increasing and higher peak value of electron density, while pulse width had little impact on electron generation and decay.
PLASMA PROCESSES AND POLYMERS
(2021)
Review
Chemistry, Inorganic & Nuclear
Hamideh Hosseini, Mohammad Ghaffarzadeh
Summary: The use of carbon nanotubes in various fields has attracted significant attention due to their unique structures and properties. The introduction of functional groups on the surface of carbon nanotubes can overcome issues such as insolubility.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Food Science & Technology
Sarmistha Mitra, Mayura Veerana, Eun-Ha Choi, Gyungsoon Park
Summary: Pre-treatment with NTAPPJ or PTW can improve the antibacterial quality of mushroom surfaces by decreasing bacterial attachment (for NTAPPJ) and increasing bacterial lipid peroxidation (for both NTAPPJ and PTW).
Article
Physics, Fluids & Plasmas
G. J. Boyle, M. Thevenet, J. Chappell, J. M. Garland, G. Loisch, J. Osterhoff, R. D'Arcy
Summary: A model describing the evolution of plasma temperature inside a discharge capillary device is developed, simplifying calculations by using an analytic quasistatic description and replacing typical MHD simulations with a single ordinary differential equation. The model is validated against existing simulations and shown to be accurate and reliable, providing a quick and easy tool for evaluating plasma conditions in discharge capillary devices.
Article
Engineering, Chemical
Ji Yoon Kim, Min Gyu Song, Eun Bi Jeon, Eun Ha Choi, Jun Sup Lim, Shin Young Park
Summary: We conducted a study on the antibacterial effect of dielectric barrier discharge plasma (DBDP) treatment on Escherichia coli and Vibrio parahaemolyticus on the surface of polypropylene plastic containers. DBDP treatment for 60 minutes showed a reduction of 1.65 log CFU/coupon (97.81% reduction) for E. coli, and a reduction of 6.81-6.13 log CFU/coupon for V. parahaemolyticus. The D-values were 26.5 and 61.2 minutes for E. coli and V. parahaemolyticus, respectively. The 60-minute DBDP treatment can be an eco-friendly sterilization method to remove over 90% of bacteria from PP plastic surfaces without any physical effect. Therefore, DBDP is suggested as a novel commercial sterilization strategy for pathogenic bacteria on polypropylene plastic surfaces.
JOURNAL OF FOOD ENGINEERING
(2023)
Article
Optics
Jaewoo Park, Yushika Aggarwal, Wonsun Kim, Shital Sharma, Eun Ha Choi, Byoungchoo Park
Summary: A highly sensitive self-powered perovskite-based photodetector was created by incorporating a noise-current-suppressible passivation layer of poly(methyl methacrylate) (PMMA) at the interface between a CH3NH3PbI3 light-absorbing layer and a NiOx hole-transporting layer. The use of the PMMA passivation layer effectively reduced unwanted carrier recombination losses and resulted in a remarkable increase in specific detectivity, wide linear dynamic response range, and rapid response times.
Article
Engineering, Chemical
Nurhaslina Abd Rahman, Choe Earn Choong, Saravanan Pichiah, In Wook Nah, Jung Rae Kim, Sang-Eun Oh, Yeomin Yoon, Eun Ha Choi, Min Jang
Summary: Titanium oxide (TiO2) has shown great potential for environmental applications, particularly in the removal of emerging contaminants. However, the scaling up of TiO2-based photoreactors remains challenging due to complex parameters. This review provides a comprehensive overview of recent research on the removal of contaminants of emerging concern using TiO2-based photoreactors, highlighting key influencing factors and discussing future research directions.
SEPARATION AND PURIFICATION TECHNOLOGY
(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
Biochemistry & Molecular Biology
Manorma Negi, Neha Kaushik, Linh Nhat Nguyen, Eun Ha Choi, Nagendra Kumar Kaushik
Summary: Cold atmospheric plasma-treated liquids (PTLs) have selective toxicity against tumor cells, mainly caused by reactive oxygen and nitrogen species in the liquids. Compared to the gaseous phase, these reactive species are more stable in the aqueous phase. This study aims to induce immunomodulation by plasma-treated Ringer's lactate (PT-RL) and phosphate-buffered saline (PT-PBS) solutions for cancer treatment.
FREE RADICAL BIOLOGY AND MEDICINE
(2023)
Article
Biochemistry & Molecular Biology
Rida Javed, Sohail Mumtaz, Eun Ha Choi, Ihn Han
Summary: Nonthermal biocompatible plasma (NBP) is a promising technology in agriculture for enhancing plant growth. Plasma serves as a source of reactive oxygen and nitrogen species (RONS) that activate signaling molecules in plant metabolism. However, the acidic pH of plasma-treated water (PTW) may be detrimental to pH-sensitive plants. Therefore, innovative techniques to neutralize the pH value of PTW to broaden the application of NBP in agriculture are urgently needed.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Biochemistry & Molecular Biology
Sohail Mumtaz, Juie Nahushkumar Rana, Jun Sup Lim, Rida Javed, Eun Ha Choi, Ihn Han
Summary: This study investigates the effect of plasma on-times on the efficacy of nonthermal atmospheric pressure plasma (NTAPP) for biomedical applications. Different duty ratios were used while keeping the treatment time fixed. The results show that increasing the plasma on-time significantly increases the levels of reactive oxygen and nitrogen species (ROS/RNS), which in turn affects cell viability and ATP levels in U87-MG brain cancer cells. This study highlights the importance of optimizing plasma on-time to enhance the effectiveness of soft plasma jet for biomedical applications.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Editorial Material
Biochemistry & Molecular Biology
Nagendra Kumar Kaushik, Eun Ha Choi
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Biochemistry & Molecular Biology
Jun Sup Lim, Daeun Kim, Sehoon Ki, Sohail Mumtaz, Abdul Munnaf Shaik, Ihn Han, Young June Hong, Gyungsoon Park, Eun Ha Choi
Summary: We investigated the characteristics of a rollable dielectric barrier discharge (RDBD) and evaluated its effects on seed germination rate and water uptake. The rotational and vibrational temperatures were measured to be 342 K and 2860 K, respectively. Chemical species analysis showed that O-3 production was dominant and NOx production was restrained at the given temperatures. Treatment of spinach seeds with RDBD for 5 minutes increased water uptake and germination rate by 10% and 15%, respectively, and reduced the standard error of germination by 4% compared to the controls. RDBD enables an important step forward in non-thermal atmospheric-pressure plasma agriculture for omnidirectional seed treatment.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Biochemistry & Molecular Biology
Kumari Shalini, Shikha Guleria, Deeksha Salaria, Rajan Rolta, Olatomide A. Fadare, Jyoti Mehta, Oladoja Awofisayo, Parteek Mandyal, Pooja Shandilya, Neha Kaushik, Eun Ha Choi, Shikha Rangra Chandel, Nagendra Kumar Kaushik
Summary: This research investigated the interactions between the medicinal plant Acorus calamus and bacterial and fungal protein targets. Among the major phytoconstituents, beta-cadinene showed the best binding interaction with the protein targets, following all rules of drug likeness and toxicity. Molecular docking and MD simulation studies demonstrated the stability of beta-cadinene in the binding pocket of the protein targets. Based on these findings, beta-cadinene can be considered as a potential treatment for bacterial and fungal infections, but further in vitro and in vivo validation is required.
JOURNAL OF BIOMOLECULAR STRUCTURE & DYNAMICS
(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
Materials Science, Multidisciplinary
Amir Muhammad Afzal, Muhammad Waqas Iqbal, Muhammad Imran, Humaira Umair, Saikh Mohammad Wabaidur, Essam A. Al-Ammar, Sohail Mumtaz, Eun Ha Choi
Summary: This research synthesized a cobalt niobium sulfide@polyaniline (CoNbS@PANI) composite using the hydrothermal method and studied its structural and electrochemical characteristics. The CoNbS@PANI composite showed an improved specific capacity of 1207.5 C g(-1) due to the large conductivity and redox-active sites provided by PANI. The performance of activated carbon (AC) was enhanced by doping with PANI and used as an electrode in a hybrid device. A supercapattery device (CoNbS@PANI//PANI@AC) was designed, which exhibited an excellent specific capacity of 185 C g(-1) at 3 A g(-1).
ECS JOURNAL OF SOLID STATE SCIENCE AND TECHNOLOGY
(2023)
Article
Pharmacology & Pharmacy
Panchanathan Manivasagan, Sekar Ashokkumar, Ala Manohar, Ara Joe, Hyo-Won Han, Sun-Hwa Seo, Thavasyappan Thambi, Hai-Sang Duong, Nagendra Kumar Kaushik, Ki Hyeon Kim, Eun Ha Choi, Eue-Soon Jang
Summary: Novel calcium ion-doped magnesium ferrite nanoparticles have been developed as efficient and biocompatible photothermal therapeutic materials for cancer treatment, with their high near-infrared absorption, short treatment period, strong cytotoxicity to cancer cells under laser irradiation, and minimal damage to healthy cells.
Article
Cell Biology
Juie Nahushkumar Rana, Sohail Mumtaz, Eun Ha Choi, Ihn Han
Summary: This study observed the effects of pulsed 3.5 GHz high-power microwave on normal brain astrocytes and cancer cells, and investigated the underlying mechanisms. The results showed that high-power microwave radiation produced reactive oxygen species, affecting cell viability, mitochondrial activity, and cell death rates. 60 pulses were found to be harmful, while 25 pulses showed therapeutic effects on cancer cells.
FRONTIERS IN CELL AND DEVELOPMENTAL BIOLOGY
(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.
