Article
Physics, Applied
Lalit K. Rajendran, Bhavini Singh, Pavlos P. Vlachos, Sally P. M. Bane
Summary: This study replicates a single filament of ns-SDBDs and characterizes the induced flow using velocity and density measurements, finding that the cooling process's time scales correspond to a circulation-based time scale of the vortex ring, and the length scale of the kernel corresponds to the vortex ring radius.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Physics, Applied
S. -J. Klose, R. Bansemer, R. Brandenburg, J. H. van Helden
Summary: The density of Ar(3P2) metastable in the effluent of the cold atmospheric pressure plasma jet kINPen was studied as a function of feed gas humidity and gas curtain composition. It was found that with the addition of water to the feed gas, the excitation dynamics changed, leading to a reduction in the production and lifetime of Ar(3P2), resulting in decreased density near the nozzle.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Physics, Applied
Chen Cheng, Hengxin He, Bin Luo, Lipeng Liu, Weijiang Chen, Kai Bian, Nianwen Xiang, Jinyang Hu
Summary: This paper presents an original investigation into time-resolved moire deflectometry (MD) for gas temperature measurements of long sparks in air. The impacts of spatial resolution and exposure time on the measurement accuracy are investigated. The results show that time-resolved MD can accurately measure the gas temperature evolution during the isobaric heating and relaxation process of long sparks, with finer spatial resolution and shorter exposure time compared to the widely used quantitative schlieren (QS) method.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Viktoras Papadimas, Christos Doudesis, Panagiotis Svarnas, Polycarpos K. Papadopoulos, George P. Vafakos, Panayiotis Vafeas
Summary: The study has developed a single dielectric barrier discharge-based actuator that is energy-efficient and stable, suitable for different aerodynamic profiles. Experimental results show that the average gas temperature above the actuator surface is around 400K, with fluid velocity reaching up to 4.5m/s, and a laminar flow layer less than 1.5mm thick is observed on the actuator surface.
APPLIED SCIENCES-BASEL
(2021)
Article
Physics, Fluids & Plasmas
J. Faltynek, V Kudrle, M. Snirer, J. Toman, O. Jasek
Summary: The study used microwave interferometry to determine the electron density during plasma synthesis of graphene. The results showed that even at a radial distance ten times larger than the apparent plasma diameter, the plasma density remained around 10^16-10^17 m^-3.
PLASMA SOURCES SCIENCE & TECHNOLOGY
(2021)
Article
Physics, Fluids & Plasmas
Augusto Stancampiano, Pablo Escot Bocanegra, Sebastien Dozias, Jean-Michel Pouvesle, Eric Robert
Summary: This study investigates the liquid flows induced by plasma treating biologically-relevant liquid in standard tissue culture grade multi well plates, revealing that evaporation governs the thermal effect and vortexes induce a non-uniform distribution of plasma generated reactive species.
PLASMA SOURCES SCIENCE & TECHNOLOGY
(2021)
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
Chemistry, Analytical
Christopher P. Rueger, Anika Neumann, Martin Sklorz, Ralf Zimmermann
Summary: APSPLI technique utilizing a fluorine excimer laser allows for selective ionization of semi- to nonpolar compounds like PAH. Installation of water and oxygen filter cartridges significantly reduces unwanted oxidized ionization artifacts, providing a new potential for analyzing complex mixtures.
ANALYTICAL CHEMISTRY
(2021)
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
Chemistry, Multidisciplinary
Mayura Veerana, Eun Ha Choi, Gyungsoon Park
Summary: The study demonstrated that plasma treatment significantly increased spore germination and alpha-amylase activity in A. oryzae, likely by elevating levels of ORP and NOX. Genomic sequencing analysis showed minimal variations in the DNA sequence post plasma treatment, suggesting potential mechanisms for enhancing enzyme activity.
APPLIED SCIENCES-BASEL
(2021)
Article
Physics, Applied
Li Wu, Xianyu Zhang, Tao Liu, Wencong Zhang, Junwu Tao, Fei Cheng
Summary: This Letter presents an atmospheric pressure low power microwave-induced air plasma source operating at 2.45 GHz. The device can self-ignite air and generate plasma with only 50 W microwave input power, without any additional trigger. Its sustaining power is as low as 10 W, and the gas temperature of plasma tail flame is about 32 degrees C measured by a fiber optic thermometer. Spectroscopic measurements revealed the presence of strong OH(A(2)S(+)? X-2?) bands at 306-310 nm and oxygen atomic lines O-I (3p5P? 3s5S) at 777.1 nm and O-I (3p3P?3s3S) at 844.6 nm. Furthermore, NO- ?(A(2)S(+)?X-2?(r)) from 200 to 300 nm was also detected in the air plasma jet. This portable plasma apparatus shows potential for air plasma applications in the biomedical fields.
APPLIED PHYSICS LETTERS
(2023)
Article
Chemistry, Analytical
Sebastian van Wasen, Yi You, Sebastian Beck, Jens Riedel, Dietrich A. Volmer
Summary: The composition of acoustically levitated droplets was investigated using a combination of mid-IR laser evaporation and subsequent postionization via secondary electrospray ionization. It was found that the release of the analyte strongly depended on the analytes, and the substance specific delayed release allowed for baseline-separated discrimination of the analytes.
ANALYTICAL CHEMISTRY
(2022)
Article
Physics, Fluids & Plasmas
Rasool Elahi, Ephraim M. Simasiku, Juan P. Trelles
Summary: The use of renewable energy for CO2 conversion can meet the demand for fuels and reduce emissions. Solar-Enhanced Microwave Plasma (SEMP) CO2 conversion combines solar thermochemical methods with plasmachemical approaches. Numerical simulations show that the incident solar radiation leads to more uniform distributions of temperature in the discharge tube, resulting in increased conversion efficiency.
PLASMA SOURCES SCIENCE & TECHNOLOGY
(2023)
Article
Multidisciplinary Sciences
Arya Iswara, Kenta Tanaka, Tatsuo Ishijima, Yukari Nakajima, Kanae Mukai, Yasunori Tanaka, Yusuke Nakano, Junko Sugama, Makoto Oe, Mayumi Okuwa, Toshio Nakatani
Summary: This study investigated the effects of non-thermal plasma treatment under non-contact conditions on the healing of full-thickness wounds in diabetic mice. The results showed that non-thermal plasma treatment reduced exudate production, promoted wound healing, and increased the formation of new blood vessels.
Article
Physics, Fluids & Plasmas
Makoto Matsui, Kota Okamoto, Seiichiro Takano, Kazuyoshi Ishikawa
Summary: In this study, laser-sustained plasmas (LSPs) using krypton, krypton/argon, and krypton/helium as substitutes for expensive xenon were successfully generated and characterized using a 4-kW-class diode laser. The properties of the LSPs were studied and optimized compared to previous LSPs using xenon.
IEEE TRANSACTIONS ON PLASMA SCIENCE
(2023)
Article
Food Science & Technology
Uta Schnabel, Oliver Handorf, Joerg Stachowiak, Daniela Boehm, Christoph Weit, Thomas Weihe, Jan Schaefer, Harald Below, Paula Bourke, Joerg Ehlbeck
Summary: The use of plasma-treated water (PTW) in fresh-cut lettuce processing can effectively reduce microbial load, ensuring food safety and quality. PTW has a significant impact on microbial and metabolic activities of lettuce, but it does not adversely affect food quality.
FOOD ENGINEERING REVIEWS
(2021)
Article
Chemistry, Physical
Gustav W. Sievers, Anders W. Jensen, Jonathan Quinson, Alessandro Zana, Francesco Bizzotto, Mehtap Oezaslan, Alexandra Dworzak, Jacob J. K. Kirkensgaard, Thomas E. L. Smitshuysen, Shima Kadkhodazadeh, Mikkel Juelsholt, Kirsten M. o. Jensen, Kirsten Anklam, Hao Wan, Jan Schaefer, Klara Cepe, Maria Escudero-Escribano, Jan Rossmeisl, Antje Quade, Volker Brueser, Matthias Arenz
Summary: A new concept of self-supported platinum-cobalt oxide networks has been proposed, combining high specific activity with a high ECSA, promising a stable fuel-cell operation. This concept exceeds the US Department of Energy targets for Pt-related ORR mass activity.
Article
Materials Science, Coatings & Films
Sehoon An, Rudiger Foest, Katja Fricke, Hendrik Riemer, Maik Froehlich, Antje Quade, Jan Schaefer, Klaus-Dieter Weltmann, Holger Kersten
Summary: The article explores the versatility of plasma electrolytic polishing (PEP) for cleaning and coating the surface of cemented carbide cutting tools. Results show that PEP treatment improves cleaning effectiveness and coating adhesion, leading to a significant increase in tool life.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Engineering, Chemical
Piotr Terebun, Michal Kwiatkowski, Agnieszka Starek, Stephan Reuter, Young Sun Mok, Joanna Pawlat
Summary: The study demonstrates that pre-sowing plasma stimulation can improve the germination capacity and energy of onion seeds. The best results were obtained with a 10-second plasma treatment.
PLASMA CHEMISTRY AND PLASMA PROCESSING
(2021)
Editorial Material
Physics, Applied
Klaus-Dieter Weltmann, Masafumi Ito, Stephan Reuter, Michael R. Wertheimer
PLASMA PROCESSES AND POLYMERS
(2021)
Article
Chemistry, Multidisciplinary
Nicholas Farr, Jeerawan Thanarak, Jan Schaefer, Antje Quade, Frederik Claeyssens, Nicola Green, Cornelia Rodenburg
Summary: Understanding the effects of sterilization methods on biomaterial surface is crucial for clinical deployment. This study compared surfaces from autoclave sterilization with low-pressure Argon glow discharge to explore a potential new sterilization method, finding that the latter showed promising results for further optimization as a potential terminal sterilization method.
Article
Chemistry, Multidisciplinary
Judit Buxadera-Palomero, Katja Fricke, Stephan Reuter, Francisco Javier Gil, Daniel Rodriguez, Cristina Canal
Summary: A rapid, one-step method for preparing acrylate-based coatings on titanium through atmospheric pressure plasma polymerization of HEMA is described in this study. The obtained hydrophilic coating showed retention of monomer chemistry and demonstrated enhanced fibroblast adhesion and decreased bacterial adhesion, making it a suitable method for producing biocompatible coatings.
APPLIED SCIENCES-BASEL
(2021)
Article
Physics, Fluids & Plasmas
Luka Hansen, Benjamin M. Goldberg, David Feng, Richard B. Miles, Holger Kersten, Stephan Reuter
Summary: The relationship between energy flux, flow dynamics, and applied electrical power of a nanosecond pulsed cold atmospheric pressure plasma jet in contact with a substrate surface was investigated. The study found a transition from laminar to turbulent flow at a lower Reynolds number than conventional values, and revealed changes in energy flux with different biasing conditions.
PLASMA SOURCES SCIENCE & TECHNOLOGY
(2021)
Article
Radiology, Nuclear Medicine & Medical Imaging
Mounir Laroussi, Sander Bekeschus, Michael Keidar, Annemie Bogaerts, Alexander Fridman, Xinpei Lu, Kostya Ostrikov, Masaru Hori, Katharina Stapelmann, Vandana Miller, Stephan Reuter, Christophe Laux, Ali Mesbah, James Walsh, Chunqi Jiang, Selma Mededovic Thagard, Hiromasa Tanaka, Dawei Liu, Dayun Yan, Maksudbek Yusupov
Summary: This article provides an overview of the applications of plasma in technology and healthcare, discusses innovative concepts and approaches to overcoming current challenges, and proposes ideas and concepts to guide future research efforts.
IEEE TRANSACTIONS ON RADIATION AND PLASMA MEDICAL SCIENCES
(2022)
Article
Polymer Science
Mehdi Ravandeh, Masoud Mehrjoo, Konstantin Kharitonov, Jan Schaefer, Antje Quade, Bruno Honnorat, Mabel Ruiz-Lopez, Barbara Keitel, Svea Kreis, Rui Pan, Seung-gi Gang, Kristian Wende, Elke Ploenjes
Summary: Polyethylene terephthalate (PET) is a widely used thermoplastic polyester in industry. Surface modification is required for printing and coating processes, and plasma treatment is commonly used to increase the hydrophilicity of PET films. This study used X-ray ptychography and scanning electron microscopy to investigate the effects of plasma treatment on the surface morphology of PET films. The results showed increased roughness and changes in morphology, as well as an increase in oxygen content and polarity without significant damage to the polymer.
Article
Physics, Applied
Maren Dworschak, Niklas Kohlmann, Filip Matejka, Pavel Galar, Lorenz Kienle, Jan Schaefer, Jan Benedikt
Summary: The HelixJet plasma source was utilized to synthesize silicon nanoparticles (Si-NPs) operating under atmospheric pressure. By adjusting the operational parameters, Si-NPs with different sizes, crystallinity, structure, and photoluminescence properties were achieved. The addition of H-2 and high RF powers led to the formation of crystalline nanoparticles with strong photoluminescence intensity, which could be tuned by controlling the synthesis parameters. Post-synthesis annealing allowed for the synthesis of large crystalline nanoparticles. The study also involved design improvements for the HelixJet plasma source, enhancing its stability and enabling continuous long-term operation.
PLASMA PROCESSES AND POLYMERS
(2023)
Article
Physics, Multidisciplinary
XinPei Lu, Peter J. Bruggeman, Stephan Reuter, George Naidis, Annemie Bogaerts, Mounir Laroussi, Michael Keidar, Eric Robert, Jean-Michel Pouvesle, DaWei Liu, Kostya (Ken) Ostrikov
Summary: Low temperature plasmas (LTPs) play a crucial role in modern society, enabling various applications. However, researchers still face challenges in terms of health, energy, and sustainability before new applications can be widely adopted.
FRONTIERS IN PHYSICS
(2022)
Article
Engineering, Environmental
Rezvan Hosseini Rad, Volker Brueser, Milko Schiorlin, Jan Schaefer, Ronny Brandenburg
Summary: CO2 splitting in a dielectric barrier discharge (DBD) is investigated using both empty and packed bed reactors with and without cerium oxide catalyst. The DBDs are operated at pressures up to 2 bar, with the addition of argon to reduce breakdown voltage. The electrical characteristics of the discharge are studied, along with the CO2 dissociation. Increasing pressure requires a higher minimum sustaining voltage amplitude, but the optimum power input depends on pressure and gas composition. Adding ceria-coated glass spheres improves reactor performance.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Physics, Applied
Sean Watson, Cedric Pattyn, Mansoureh Mohseni Garakani, Abdellah Ajji, Stephan Reuter, Michael R. Wertheimer
Summary: This study is the first to investigate the aging of two different rough surface structures, electrospun nanofibrous mats and flat films, for three biotechnologically relevant polymers. Two different plasma treatments were applied and the time-dependent surface compositions and water contact angles were analyzed. The results showed that these properties reached asymptotic values after approximately 30 days of storage, consistent with previous findings. Additionally, the time-dependent behaviors of the contact angles for the two types of samples were compared using Wenzel and Cassie-Baxter models, including possible transitions and their interpretation.
PLASMA PROCESSES AND POLYMERS
(2023)
Article
Physics, Fluids & Plasmas
Julien Bissonnette-Dulude, Sylvain Coulombe, Thomas Gervais, Stephan Reuter
Summary: In this study, a prototype device that combines microfluidics with plasma technology is proposed for the study of plasma-liquid interactions. The transport of reactive species generated by plasma in the liquid is investigated using colorimetric analysis of hydrogen peroxide concentration. The results show that this plasma-microfluidic prototype has great potential for fundamental research in plasma-liquid interactions, and opens the way for future combinations of plasma devices with standard microfluidic devices.
PLASMA SOURCES SCIENCE & TECHNOLOGY
(2023)