Article
Polymer Science
Felipe Vicente de Paula Kodaira, Ana Carla de Paula Leite Almeida, Thayna Fernandes Tavares, Antje Quade, Luis Rogerio de Oliveira Hein, Konstantin Georgiev Kostov
Summary: A funnel-like atmospheric pressure plasma jet with a wide exit was proposed to overcome the limitation of small treatment area. Gas-permeable cotton cloth covered the nozzle to improve gas flow dynamics. Surface modifications were observed on both sides of the treated samples with different functional groups.
Article
Physics, Fluids & Plasmas
S. Jaiswal, E. M. Aguirre, T. van der Gaag
Summary: We presented a detailed characterization of an atmospheric pressure plasma jet that produces metastable oxygen and emits the auroral green line. Optical emission spectroscopy was used to analyze the plasma jet and understand the mechanism of metastable oxygen creation and destruction. Changes in the plasma jet behavior were observed when altering parameters.
PLASMA SOURCES SCIENCE & TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Yu-Tang Luo, Zhehan Zhou, Cheng-Yang Wu, Li-Ching Chiu, Jia-Yang Juang
Summary: Co-doped ZnO thin films with enhanced electrical properties and more controllable optical properties are prepared using atmospheric pressure plasma jet (APPJ) systems. The films exhibit a significant increase in haze factor when prepared with specific precursor concentrations of Ga and Zr, and the interplay between Zr concentrations and film properties is examined in detail.
Article
Materials Science, Coatings & Films
Xinglei Cui, Zhenbo Xu, Yangyang Zhou, Xi Zhu, Sen Wang, Zhi Fang
Summary: This study demonstrates that a superhydrophobic film can be deposited on the ceramic surface under appropriate treatment conditions, and further investigates the hydrophobicity of the film.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Jia-Shiuan Tsai, Jian-Zhang Chen
Summary: This study investigated the impact of oxygen impurity on the inlet gas in a nitrogen atmospheric pressure plasma jet (APPJ). A numerical model was developed to simulate the nitrogen APPJ considering fluid dynamics, heat transfer, mass transfer, diffusion, and chemical reactions. Experimental tests were conducted to verify the plasma temperature characteristics on the treated surface. The findings revealed that the plasma temperature decreased with increasing oxygen impurity, affecting the excited and neutral species composition.
APPLIED SCIENCES-BASEL
(2023)
Article
Materials Science, Composites
Jun Xie, Zihao Xie, Yanze Song, Jiang Liu, Jinjian Zhao, Qing Xie
Summary: In this study, surface fluorinated etching and SiOx deposition were performed on Al2O3/EP using atmospheric pressure plasma jet (APPJ). Various testing methods were used to investigate the impacts of plasma modification on the physicochemical characterization of Al2O3/EP. The results showed that fluorinated etching enhanced the roughness and F element proportion, while SiOx deposition dispersed charges and reduced surface roughness.
POLYMER COMPOSITES
(2023)
Article
Chemistry, Physical
Sile Chen, Tao Cheng, Zhaoquan Chen, Xingyu Chen, Guan-Jun Zhang
Summary: Surface fluorination by low-temperature plasma treatment can enhance the surface electrical strength of insulating materials. The performance of modified materials is influenced by operation parameters, leading to different physical and chemical changes on the surface properties. Adjusting plasma exposure time, applied voltage, and CF4 volume fraction can affect the multi-effects caused by the various processes in the interface between plasma and material surface.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Physical
Yu-Chen Chen, Ping-Chia Hsu, Li Xu, Jia-Yang Juang
Summary: In this study, continuous CO2 laser annealing was shown to enhance the electrical conductivity, uniformity, and NIR transmittance of GZO films deposited by APPJ. The improvement may be attributed to the reduction of Ga-O clusters which act as barrier traps in degrading carrier mobility.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Matteo Favaro, Alessandro Patelli, Riccardo Ceccato, Sandra Dire, Emanuela Callone, Giulia Fredi, Alberto Quaranta
Summary: This study investigated the co-deposition of thin polymeric films loaded with zinc oxide nanoparticles using atmospheric pressure plasma jet technology. The crystalline ZnO nanoparticles were produced by wet chemistry and injected into the plasma with an aerosol buffer. The polymeric encapsulation of ZnO led to the recovery of UV excitonic emission and a remarkable increase in luminescence yield.
Article
Computer Science, Information Systems
Chi-Feng Su, Chih-Tung Liu, Jong-Shinn Wu, Ming-Tzu Ho
Summary: This paper presents the design and implementation of a miniaturized high-voltage power supply with power factor correction for atmospheric-pressure plasma jet applications. The developed power supply can control the output frequency and voltage independently, and the performance is validated using a helium APPJ load. The integration of a PFC converter improves the power factor and reduces the high-voltage ripple of the output.
Article
Physics, Applied
Liyang Zhang, Dongheyu Zhang, Yuntao Guo, Qun Zhou, Haiyun Luo, Jinfeng Tie
Summary: In this study, the surface decontamination of bacteria by argon atmospheric-pressure plasma jet was systematically investigated. The chemical modifications and etching characteristics of Gram-positive and Gram-negative bacteria were analyzed through in-situ Fourier transform infrared spectroscopy. It was found that etching, rather than chemical modifications, dominates the infrared spectral variations. The etching rate of bacteria is comparable to the cell wall constituents. The destruction of the cellular envelope by plasma etching is identified as the main cause of bacterial inactivation. The limited penetration depth of reactive species into bacterial deposits was also observed.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Polymer Science
Mehrnoush Narimisa, Yuliia Onyshchenko, Rino Morent, Nathalie De Geyter
Summary: This study demonstrates the significant impact of shielding gases on the performance of an atmospheric pressure plasma jet in treating polyethylene terephthalate surfaces. The use of argon gas improves wettability and the size of the modified area, while nitrogen gas decreases the area of plasma impact. These findings highlight the importance of shielding gases in controlling the ambient conditions and surface modification effectiveness of the APPJ.
Article
Physics, Multidisciplinary
Kong De-Lin, Yang Bing-Yan, He Feng, Han Ruo-Yu, Miao Jin-Song, Song Ting-Lu, Ouyang Ji-Ting
Summary: This paper presents the characteristics of titanium oxide (TiO2) thin films deposited by using atmospheric pressure corona plasma jet and investigates the influence of corona polarity and operating parameters on the properties of TiO2 films. Results show that TiO2 films prepared using negative corona plasma have a more uniform surface and higher Ti content. These findings are useful for preparing uniform and functional oxide film materials using atmospheric pressure plasma jet technology.
ACTA PHYSICA SINICA
(2021)
Article
Materials Science, Multidisciplinary
J. G. Quinones-Galvan, Dagoberto Cardona, L. P. Rivera, G. Gomez-Rosas, A. Chavez-Chavez
Summary: Copper containing silicon oxide layers were grown by pulsed laser deposition, with the Cu content in the films modified by varying the Cu plasma density. Different Cu species were incorporated into SiOx matrices with different Si/O atomic ratios as the Cu ion density increased.
Article
Chemistry, Physical
Yun-Chung Lee, Yu-Chen Chen, Hsin-Tien Lin, Li Xu, Ming-Tsang Lee, Jia-Yang Juang
Summary: Transparent conductive oxides (TCOs) are essential for optoelectronic applications. This study presents a novel method for patterning transparent conductive zinc oxide (ZnO) films on glass substrates using a laser-assisted atmospheric pressure plasma jet (APPJ) technique.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Jaroslav Kousal, Zdenek Krtous, Zuzana Kolarova Raskova, Jana Sedlarikova, Jan Schaefer, Liliana Kucerova, Artem Shelemin, Pavel Solar, Anna Hurajova, Hynek Biederman, Marian Lehocky
Article
Physics, Applied
R. Hink, A. Pipa, J. Schaefer, R. Caspari, R. Weichwald, R. Foest, R. Brandenburg
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2020)
Article
Instruments & Instrumentation
Th Wegner, B. Geiger, R. Foest, A. Jansen van Vuuren, V. R. Winters, C. Biedermann, R. Burhenn, B. Buttenschoen, G. Cseh, I Joda, G. Kocsis, F. Kunkel, A. Quade, J. Schaefer, O. Schmitz, T. Szepesi
REVIEW OF SCIENTIFIC INSTRUMENTS
(2020)
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
Physics, Applied
Tom Trautvetter, Jan Schaefer, Omar Benzine, Ralf Methling, Hardy Baierl, Volker Reichel, Jan Dellith, Daniel Koepp, Frank Hempel, Marjan Stankov, Margarita Baeva, Ruediger Foest, Lothar Wondraczek, Katrin Wondraczek, Hartmut Bartelt
PLASMA PROCESSES AND POLYMERS
(2020)
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
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
Multidisciplinary Sciences
Steffen Franke, Lucian Paulet, Jan Schaefer, Deborah O'Connell, Markus M. Becker
Article
Nutrition & Dietetics
Uta Schnabel, Oliver Handorf, Hauke Winter, Thomas Weihe, Christoph Weit, Jan Schaefer, Joerg Stachowiak, Daniela Boehm, Harald Below, Paula Bourke, Jorg Ehlbeck
Summary: This study evaluated the impact of plasma treated water (PTW) on fresh-cut endive processing, finding that PTW can maintain the quality characteristics of endive and improve color and texture, while also reducing microbial load within EU regulations.
FRONTIERS IN NUTRITION
(2021)
Article
Chemistry, Physical
Carsten Wickmann, Christopher Benz, Horst Heyer, Kerstin Witte-Bodnar, Jan Schaefer, Manuela Sander
Summary: This study aimed to investigate the formation of the 'fine granular area' (FGA) in additively manufactured Ti6Al4V specimens with artificially generated internal defects in the early stage of fatigue crack growth in the 'very high cycle fatigue' (VHCF) regime. Fatigue tests were conducted using an ultrasonic fatigue testing setup, and failed specimens were analyzed using optical microscopy, scanning electron microscopy (SEM), and focused ion beam (FIB) techniques. Alternative proposals for identifying the FGA layer were introduced, and various fracture mechanical approaches were applied to evaluate the possibility of FGA formation, with results compared to experimental findings.
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
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
Chemistry, Multidisciplinary
Nicholas T. H. Farr, Sabiniano Roman, Jan Schaefer, Antje Quade, Daniel Lester, Vanessa Hearnden, Sheila MacNeil, Cornelia Rodenburg
Summary: Polypropylene (PP) surgical mesh, successful in abdominal hernia repair, can lead to serious clinical complications when used for stress urinary incontinence or pelvic organ prolapse repair in the pelvic floor; evidence suggests that PP fibers are susceptible to oxidative damage and play a role in causing complications. The specific host response mechanisms against the material remain poorly understood.