Article
Engineering, Environmental
Liyang Zhang, Yuntao Guo, Jinfeng Tie, Zenghui Yao, Zihao Feng, Qiong Wu, Xinxin Wang, Haiyun Luo
Summary: Atmospheric pressure dielectric barrier discharge (DBD) plasma is effective for bioaerosol decontamination in indoor environments. However, there is limited understanding of the dose-response characteristics of plasma-based disinfection. This study investigated the removal efficiency of S. lentus aerosol using different DBD plasma setups and found that the specific input energy (SIE) can be used as the dose for disinfection, with efficiency exponentially dependent on SIE. The study also identified factors such as humidity and the higher efficiency of MS2 phage compared to S. lentus and E. coli.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Engineering, Chemical
Jincheng Ran, Yuepeng Li, Menghan Zong, Huabing Xu, Man Jiang, Enxia Gao, Zhiguo Zhang
Summary: Although low-temperature plasma has been proven to be effective for mineral modification, its application to the pulp system has not been reported. In this study, surface dielectric barrier discharge (SDBD) low-temperature plasma was introduced into the pulp through a bubble generator, and its modification mechanism on arsenopyrite and pyrite was investigated. The results showed that SDBD plasma exhibited excellent selectivity, with much less hydrophilic oxidation products on the surface of plasma-modified pyrite compared to arsenopyrite. The introduction of plasma into the pulp resulted in a longer residence time of the pulp chemistry of arsenopyrite in the stable oxidation region compared to pyrite. Plasma modification significantly enhanced the oxidation degree of the defect area on the surface of arsenopyrite, leading to a decrease in its hydrophobicity and hindering the adsorption of collector and the oxidation of xanthate ions into dixanthogen. Due to its environmentally-friendly property, SDBD plasma modification has a broad application prospect in the flotation separation of polymetallic sulfide ores.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Kaiyue Wu, Jingnan Liu, Jiacun Wu, Mo Chen, Junxia Ran, Xuexia Pang, Pengying Jia, Xuechen Li, Chenhua Ren
Summary: This article reports a double-mode argon planar plume, which operates in the streamer mode and transits to the filamentary mode. Discharge characteristics and plasma parameters are compared for the two modes, showing that the streamer mode and the filamentary mode correspond to pulsed and humped discharges respectively. Fast photography reveals that the streamer-mode plume is composed of stochastically branching streamers, while the filamentary-mode plume results from a series of moving filaments similar to those in barrier discharge. The filamentary mode has lower excited electron temperature and vibrational temperature, whereas higher electron density and gas temperature, and it achieves better hydrophilicity of polyethylene terephthalate surface.
Article
Nanoscience & Nanotechnology
Shintaro Sato, Mahoro Sakurai, Naofumi Ohnishi
Summary: This study demonstrates the successful induction of a unidirectional ionic wind by adding an embedded electrode in a coplanar discharge, thus breaking the generation of a symmetrical electric field. The coplanar discharge-based, exposed-electrodeless plasma actuator developed in this study generates a diffused and uniform surface discharge, comparable to that generated by conventional plasma actuators. The study emphasizes the significance of the phase difference between the repetitive pulses for generating coplanar discharge and the square-waveform voltage for accelerating the charged particles.
Article
Chemistry, Multidisciplinary
Yaolin Wang, Wenjie Yang, Shanshan Xu, Shufang Zhao, Guoxing Chen, Anke Weidenkaff, Christopher Hardacre, Xiaolei Fan, Jun Huang, Xin Tu
Summary: Plasma catalysis holds promise for decentralized NH3 synthesis using renewable energy, with a bespoke design of supported Ni catalysts showing potential for efficient NH3 production. By depositing Ni active sites on the surface of mesoporous MCM-41, it enhances plasma-catalyst interactions and shields NH3 from decomposition, driving the reaction forward effectively. This demonstrates the importance of rational catalyst design for improving plasma-catalytic processes.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Engineering, Environmental
M. Hatzisymeon, D. Tataraki, G. Rassias, C. A. Aggelopoulos
Summary: This study combined in-soil generated plasma micro-discharges with high voltage nanosecond pulses to efficiently degrade trifluralin in soil. Detailed parametric analysis led to optimal operational conditions, achieving outstanding energy efficiency and degradation of the harmful pesticide.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Physics, Applied
Guanglin Yu, Bangfa Peng, Nan Jiang, Ronggang Wang, Haoyang Sun, Zhengyan Liu, Kefeng Shang, Na Lu, Jie Li
Summary: The plasma characteristics in a DBD device with a rotating dielectric barrier were investigated in this study. The results showed that rotating the barrier improved discharge power and the number of current pulses. The rotation reduced the grayscale standard deviation of the discharge images and resulted in a diffusion distribution of microdischarges. The mechanism of enhancing discharge energy and uniformity was analyzed based on surface charges and electron detachment from space negative charges.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2023)
Article
Nanoscience & Nanotechnology
Ahmed Shafique, Vijay Shankar Rangasamy, Annick Vanhulsel, Mohammadhosein Safari, Silvia Gross, Peter Adriaensens, Marlies K. Van Bael, An Hardy, Sebastien Sallard
Summary: The study demonstrates the preparation of PEDOT-coated sulfur particles using dielectric barrier discharge plasma technology under atmospheric conditions, showcasing the wide applicability and practicality of this method. Different coating protocols resulted in PEDOT-coated sulfur powders with electrical conductivity in the range of 10(-8)-10(-5) S/cm. Cells containing the optimum-PEDOT-coated sulfur showed improved cycling performance in comparison to cells using raw sulfur as the reference material in lithium-sulfur batteries.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Physics, Applied
Abdulkadir Yayci, Tim Dirks, Friederike Kogelheide, Miguel Alcalde, Frank Hollmann, Peter Awakowicz, Julia E. Bandow
Summary: This study delves into plasma-driven biocatalysis using enzymes, finding that specific immobilization methods can effectively protect enzyme activity, while chemical scavengers and chaperone proteins did not prolong enzyme lifespan.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Mechanics
Zihao Zhu, Pau Fradera-Soler, William Jo, Feng Liu
Summary: Navier-Stokes computations were used to study the effects of dielectric barrier discharge (DBD) plasma actuators on flow past a square cylinder. It was found that the effectiveness of flow control by the plasma actuators varied with the location and input power of the actuators in different configurations. The best flow control effect was achieved in the last configuration where vortex shedding and drag were significantly reduced.
Article
Chemistry, Physical
Juchan Kim, Chaesung Lim, Dongmin Lee, Hayoung Jeong, Jeong Woo Han, Kyoung-Su Ha
Summary: Lanthanum-based perovskite catalysts combined with non-thermal plasma can enhance the performance of partial oxidation of methane. Surface oxygen species of the perovskite catalysts play a crucial role in the reaction. Sr-doped LaAlO3 catalysts show improved H2 selectivity and slightly higher CO selectivity due to enhanced oxygen transfer capability.
JOURNAL OF CATALYSIS
(2023)
Article
Nanoscience & Nanotechnology
Shintaro Sato, Tomoki Enokido, Naofumi Ohnishi
Summary: A new concept of electrode shape and arrangement is proposed for developing a multi-stage plasma synthetic jet actuator that can operate at low voltage, producing uniform discharge and unidirectional ionic wind. Particle image velocimetry measurements show that the wall-normal jet induced by the actuator is characterized as an axisymmetric free shear flow.
Article
Chemistry, Physical
Faegheh Fotouhiardakani, Morgane Laurent, Jacopo Profili, Sethumadhavan Ravichandran, Gowri Dorairaju, Gaetan Laroche
Summary: Due to their inertness and low friction, fluoropolymers are widely used in various industries, but their low adhesion limits their application in composite devices. Atmospheric pressure discharges provide a cost-effective and environmentally friendly method to enhance their adhesion. However, the underlying chemical and physical processes in the discharge are not fully understood.
Article
Physics, Applied
Antoine Belinger, Simon Dap, Nicolas Naude
Summary: This study focuses on a diffuse Dielectric Barrier Discharge (DBD) in atmospheric pressure air and investigates the influence of capacitance on the discharge regime. By modifying the dielectric capacitance and using electrical measurements, the effective surface and current density of the discharge were obtained. The results highlight the significance of controlling capacitance to achieve diffuse discharge at high frequency, which has potential applications in atmospheric pressure coating.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Mechanics
Yizhou Wang, Yun Wu, Haohua Zong, Haideng Zhang, Yinghong Li
Summary: A parametric study is conducted to obtain the general criterion of control authority for suppressing flow separation in the compressor airfoil at low Reynolds number using nanosecond pulsed dielectric barrier discharge plasma actuation with different actuation parameters. The study focuses on the actuation power and actuation frequency using large eddy simulation. The relationship between the actuation power and the characteristic power of the baseline flow field is revealed through a proposed non-dimensional actuation power, providing a reference for balancing energy consumption and flow control. The mechanism behind the evolution process of vortex structures induced by the plasma actuation is analyzed using vorticity decomposition and Q criterion analysis, showing consistent tendencies in three stages corresponding to different disturbance processes induced by Kelvin-Helmholtz instabilities. A criterion for the effective actuation frequency is established based on continuous generation of induced vortex structures considering different actuation powers and simplified to specific parameters within the flow field.
Article
Biochemistry & Molecular Biology
Zlata Kelar Tucekova, Lukas Vacek, Richard Krumpolec, Jakub Kelar, Miroslav Zemanek, Mirko Cernak, Filip Ruzicka
Summary: The study investigates the efficacy of plasma-activated gas on decontaminating bacterial biofilms on polypropylene nonwoven textile surfaces, revealing that exposure time and plasma source power input affect bacterial biofilm elimination efficiency. Furthermore, the log reduction of viable biofilm units decreases with increasing distance from the dielectric surface.
Article
Physics, Fluids & Plasmas
L. Kusyn, P. Synek, M. M. Becker, T. Hoder
Summary: In this study, the origin of filamentary patterns in a sinusoidally driven surface barrier discharge at high over-voltage in atmospheric pressure air was investigated. Time-correlated single-photon counting based optical emission spectroscopy was used to reveal ultrafast processes within generated discharges in both polarities of the applied voltage. The study found that the initiation of a complex streamer cascade under negative polarity led to the formation of long filamentary structures.
PLASMA SOURCES SCIENCE & TECHNOLOGY
(2021)
Article
Polymer Science
Pavol Gemeiner, Michaela Pavlickova, Michal Hatala, Matej Hvojnik, Tomas Homola, Milan Mikula
Summary: Dye-sensitized solar cells (DSSCs) have garnered attention due to high conversion efficiency, low-cost, and eco-friendly fabrication. The use of screen-printed PEDOT:PSS as a Pt-free alternative for the counter-electrode, with the addition of dopants, shows promising results in improving the efficiency of DSSCs.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Energy & Fuels
Elena Villar-Navarro, Irina Levchuk, Juan Jose Rueda-Marquez, Tomas Homola, Miguel Angel Morinigo, Riku Vahala, Manuel Manzano
Summary: This study investigated the impact of water temperature on bacterial inactivation in simulated aquaculture streams using various advanced oxidation processes. Results showed that addition of hydrogen peroxide during UVA disinfection and photocatalysis enhanced inactivation rates, with higher efficiency observed at higher temperatures and with different AOPs. The study suggests that temperature and the presence of hydrogen peroxide play critical roles in bacterial disinfection processes.
Article
Materials Science, Multidisciplinary
Y. Jiraskova, F. Zazimal, J. Bursik, T. Svoboda, P. Dzik, T. Homola
Summary: The application of iron-oxide nanopowders in the preparation of magnetic inks was studied. Basic data of samples in different forms were obtained through experimental methods and the changes during processing steps were tracked. It was found that the iron-oxides were not pure single-phase compositions, with substantial amounts of magnetite and maghemite present in hematite. The magnetic parameters of the iron-oxides were comparable in nanopowder and ink forms, but showed significant changes in the solidified state after printing.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2022)
Article
Materials Science, Paper & Wood
Matias Lakovaara, Juho Antti Sirvio, Rafal Sliz, Julius Vida, Tomas Homola, Henrikki Liimatainen
Summary: This study demonstrates the hydrophobic modification of cellulose nanofiber films using a deep eutectic solvent as a reaction medium. The esterification process significantly improves the hydrophobicity, water vapor barrier properties, and mechanical properties of the films, especially when pretreated with UV and ozone.
Article
Chemistry, Physical
Reinhard Kaindl, Tomas Homola, Armando Rastelli, Albin Schwarz, Aivar Tarre, Dietmar Kopp, Anna Maria Coclite, Michael Goertler, Benjamin Meier, Bernd Prettenthaler, Maria Belegratis, Juergen M. Lackner, Wolfgang Waldhauser
Summary: This study achieved surface functionalization on various material structures using atomic layer deposition. The findings showed that deposition temperature, substrate material, and process conditions significantly influence the coating structure and composition. These results demonstrate the potential and limitations of combining additive manufacturing and atomic layer deposition for medical and energy production applications.
SURFACES AND INTERFACES
(2022)
Article
Nanoscience & Nanotechnology
Leo Sala, Tomas Perecko, Oto Mestek, Dominik Pinkas, Tomas Homola, Jaroslav Kocisek
Summary: In this study, cisplatin was utilized as a therapeutic and cross-linking agent for DNA origami nanostructures. The loading of cisplatin molecules onto the nanostructures showed time dependence and gradual release. Structural distortions were observed when the number of loaded cisplatin molecules exceeded a certain threshold. Cisplatin-loaded DNA origami nanostructures exhibited significant cytotoxicity against cancer cells, making them a promising drug carrier.
ACS APPLIED NANO MATERIALS
(2022)
Article
Engineering, Mechanical
Tomas Homola, Jakub Kelar, Mirko Cernak, Dusan Kovacik
Summary: This paper introduces the technology of generating high-power density surface plasma using DCSBD plasma unit and discusses its integration in R2R production lines and its effects on the surface of polyamide.
VAKUUM IN FORSCHUNG UND PRAXIS
(2022)
Article
Chemistry, Multidisciplinary
Julius Vida, Pavol Gemeiner, Michaela Pavlickova, Martina Mazalova, Pavel Soucek, Dusan Plasienka, Tomas Homola
Summary: Researchers have developed a low-temperature plasma process to form small TiO2 nanoparticles on the surface of MXenes within seconds. This method is suitable for producing temperature-sensitive flexible and printed electronics, and has significant potential for application.
Correction
Chemistry, Multidisciplinary
Tomas Homola, Jan Pospisil, Richard Krumpolec, Pavel Soucek, Petr Dzik, Martin Weiter, Mirko Cernak
Article
Polymer Science
Martin Kormunda, Petr Rysanek, Tomas Homola, Jiri Henych, Jakub Tolasz, Jakub Hoskovec, Pavla Capkova
Summary: A fluorocarbon-based (CF) nanofibrous membrane was prepared by electrospinning of polyvinylidene fluoride and its surface was modified by CeOx nanoparticles through immersion in a colloidal solution. Two methods of deposition of CeOx nanoparticles were used on the CF nanofiber membrane: direct deposition on the pristine membrane and immediate deposition on the plasma treated membrane. The plasma treatment resulted in a higher amount of CeOx nanoparticles on the CF membrane surface, with a slight decrease in the Ce3+/Ce4+ ratio. XPS and SEM analysis confirmed the presence of CeOx on the nanofiber surfaces and suggested a possible chemical bonding.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Energy & Fuels
Julius Vida, Jan Pospisil, Pavel Soucek, Martin Weiter, Tomas Homola
Summary: Reducing the sintering temperature and time of mesoporous titanium dioxide is crucial for the application of mesoscopic perovskite solar cells. In this study, a plasma-based method was developed to sinter the mesoporous titanium dioxide in a significantly shorter time and lower temperature compared to the standard thermal approach. The efficiency achieved using this method was comparable to the standard thermal approach.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2023)
Article
Engineering, Environmental
Irina Levchuk, Tomas Homola, Gaurav Singhal, Juan Jose Rueda-Marquez, Julius Vida, Pavel Soucek, Tomas Svoboda, Elena Villar-Navarro, Olga Levchuk, Petr Dzik, Anna Lahde, Javier Moreno-Andres
Summary: In this study, TiO2/polysiloxane(SiBi) thin films modified with varying concentrations of graphene oxide (GO) were prepared using ink-jet printing technique on flexible PET substrates. The prepared coatings were characterized and tested for photocatalytic activity. The results showed that reduction of GO occurred during photocatalytic tests and higher concentrations of rGO in the thin films led to better photocatalytic inactivation of microorganisms.
CHEMICAL ENGINEERING JOURNAL ADVANCES
(2022)
Article
Physics, Applied
M. Pazderka, R. Pribyl, M. Zemanek, J. Kelar, T. Plsek, Z. Kelar Tucekova, M. Cernak
Summary: This study presents a robust method for detecting current peaks in atmospheric pressure dielectric barrier discharge characterization. The method, using passive filters and suitable for automation, discusses the design of apparatus and challenges in detail, presents an adapted definition of ignition voltage and demonstrates its relevance on a large statistical sample. The applicability of the method for atmospheric and lower pressure discharges is shown, with estimates on its limits.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
