Artículos de revistas: "Dielectric barrier discharges (DBD)"

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Dineff, Peter y Dilyana Gospodinova. "Electrode configurations and non-uniform dielectric barrier discharge properties". Facta universitatis - series: Electronics and Energetics 22, n.º 2 (2009): 217–26. http://dx.doi.org/10.2298/fuee0902217d.

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Interesting types of AC discharges in ambient air at atmospheric pressure for the generation of non-thermal plasma at/on dielectric surfaces were investigated. Pin-to-plane dielectric barrier discharge (PTP-DBD) was sustained in the electrode configurations combining electrode components of both corona and DBD - metallic pins, or triangle spikes electrode, situated single- or double-in-line and metallic plate electrode covered with a dielectric barrier. It was investigated experimentally and theoretically the burning mode of a PTP-DBD in ambient air at atmospheric pressure. The PTP-DBD behavior with single- or double-in-line spikes high voltage electrode was discussed. The PTP-DBD is a new DBD-based discharge. .

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2

Lee, Don Kyu. "Analysis of the Characteristics on Dielectric Barrier Discharges Depending on the Relative Permittivity and Frequency". Applied Mechanics and Materials 875 (enero de 2018): 113–16. http://dx.doi.org/10.4028/www.scientific.net/amm.875.113.

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Various studies are being conducted on the application of DBD (Dielectric barrier discharges). The internal dielectric has a very important characteristic on DBD, thus we analyze of the characteristics on dielectric barrier discharges depending on the relative permittivity and frequency. Through simulation, the discharge voltage was calculated based on relative permittivity and frequency of real used dielectrics (Green sheet, Down dielectric, white dielectric). We investigate that increased relative permittivity and fast frequency occur the decrease of the firing voltage. Also, we investigate the frequency dependence of the dielectric constant and dielectric loss of dielectric layers measured at a frequency region of 100Hz to 10MHz. In a condition of drive within 1MHz, with regard to the change of real and imaginary part according to frequency, it has quite stable dielectric constant in the condition of drive within 1MHz.

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3

Chirokov, A., A. Gutsol y A. Fridman. "Atmospheric pressure plasma of dielectric barrier discharges". Pure and Applied Chemistry 77, n.º 2 (1 de enero de 2005): 487–95. http://dx.doi.org/10.1351/pac200577020487.

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The dielectric barrier discharge (DBD) has a number of industrial applications and has been a subject of research for many years. Many studies have been carried out to understand the underlying DBD physics. Despite the fact that much progress has been made, some important issues are still far from being clear. In this work, we summarize the basics of DBD physics and introduce innovative concepts of discharge behavior that were discovered recently.

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4

Okazaki, Ken y Tomohiro Nozaki. "Ultrashort pulsed barrier discharges and applications". Pure and Applied Chemistry 74, n.º 3 (1 de enero de 2002): 447–52. http://dx.doi.org/10.1351/pac200274030447.

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Atmospheric pressure nonequilibrium plasmas have made a recent remarkable progress in formation techniques including atmospheric pressure glow discharge (APG), dielectric barrier discharge (DBD), corona discharge, surface discharge, ultrashort pulsed discharge, etc., and are expanding their applications into the field of energy and environment as well as material conversion processes. This paper will especially focus on a large improvement of DBD by combining it with squared ultrashort high voltage pulses and various applications.

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Sláma, Jan y Vítezslav Kríha. "INHIBITION OF CANDIDA ALBICANS GROWTH ON SURFACES TREATED BY DIELECTRIC BARRIER DISCHARGE WITH VARIOUS BARRIERS". Acta Polytechnica 54, n.º 4 (31 de agosto de 2014): 290–94. http://dx.doi.org/10.14311/ap.2014.54.0290.

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Discharges generating low temperature plasma at atmospheric pressure have the potential to treat surfaces biologically contaminated by organic matter in a non-destructive manner. We have been studying ways of inhibiting the growth of microorganisms with the use of dielectric barrier discharge (DBD) plasma. The effect of the choice of a barrier material and its thickness on the germicide properties of the DBD is described. We used Saboraud agar inoculated by 105 cfu/cm2 of Candida albicans yeast as the model contaminated surface. After cultivation, the proportion of the treated surface with no C. albicans colony was evaluated.

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6

JARDIM, C. M., R. C. OLIVEIRA, J. S. HSIEH, A. J. RAGAUSKAS y T. ELDER. "Eucalyptus fiber modification using dielectric-barrier discharge". TAPPI Journal 14, n.º 9 (1 de octubre de 2015): 585–91. http://dx.doi.org/10.32964/tj14.9.585.

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This study involves an investigation of the impact of the various levels of atmospheric dielectricbarrier discharge (DBD) treatment on the surface of eucalyptus fibers at different levels of beating with the objective of enhancing paper strength properties. The DBD treatment led to significant improvements in wet-strength tensile properties, increasing them by 2%-112%, as a function of the dosage of atmospheric plasma applied. Also, using controlled dosages of the DBD treatment, dry-strength tensile could be improved, reaching a 58% increase. In addition, non-beaten samples showed greater increases in strength properties than the beaten samples. Moreover, the acid surface content was unaltered by the DBD treatment, perhaps due to over-oxidation and generation of low molecular weight species that are easily removed by washing with water. Furthermore, increases in wettability could be observed for specific DBD dosage of treatments. Atomic force microscopy images of the treated handsheets showed that DBD treatment results in surface smoothing of the fibers. In conclusion, DBD treatment was shown tobe an effective approach for eucalyptus fiber modification, especially in terms of enhancement of wet-strength properties.

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7

Žigon, Jure, Marko Petrič y Sebastian Dahle. "Dielectric barrier discharge (DBD) plasma pretreatment of lignocellulosic materials in air at atmospheric pressure for their improved wettability: a literature review". Holzforschung 72, n.º 11 (27 de noviembre de 2018): 979–91. http://dx.doi.org/10.1515/hf-2017-0207.

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AbstractThe treatment of wood surfaces with gas discharges is one of the methods to achieve better surface adhesion properties. Good penetration, spreading and wettability of the applied liquid adhesives and coatings is a crucial factor for their adequate mechanical properties. Plasmas are the result of electrical discharge and can be created in different ways. The plasma treatment (PT) is frequently executed prior to material bonding or coating via the so-called dielectric barrier discharges (DBD) at atmospheric pressure. This literature review summarizes the essential aspects of DBD PTs aiming at a better wettability and surface adhesion. After introduction of the principle of DBD, the individual effects of internal and external parameters of the process will be discussed, which influence the final properties of treated materials.

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Dilecce, Giorgio, Paolo F. Ambrico y Santolo De Benedictis. "Optical diagnostics in dielectric barrier discharges at atmospheric pressure". Pure and Applied Chemistry 82, n.º 6 (20 de abril de 2010): 1201–7. http://dx.doi.org/10.1351/pac-con-09-08-19.

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Our recent work on optical emission spectroscopy (OES) and laser-induced fluorescence (LIF) applied to dielectric barrier discharge (DBD) at atmospheric pressure (ATP) is reported. The interplay of discharge kinetics and diagnostic techniques features is evidenced, with emphasis on collision processes that, with their variety of state-to-state characteristics and rate constants, determine the observation of a peculiar collision-dominated non-equilibrium system.

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9

Thapa, Bhesh Bahadur y Raju Bhai Tyata. "Study of Dielectric Barrier Discharge in Air and Estimation of Electron Density and Energy Deposition". Journal of Science and Engineering 7 (20 de diciembre de 2019): 1–9. http://dx.doi.org/10.3126/jsce.v7i0.26780.

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This paper reports the electrical behaviors of atmospheric pressure plasma reactor with Dielectric Barrier Discharge (DBD) in air medium. The DBD discharge was generated in air at atmospheric pressure using Disc Electrode Geometry (DEG) reactor powered by ac voltage (0-7kV) at a frequency of 24kHz. The glass plates of thickness 1.0mm and 3.0mm were used as dielectric. The current-voltage characteristics were studied for two air gap of 2.0mm and 3.0mm by varying the applied voltages. The numbers of filamentary micro discharges were found as increased in each half cycle with increase in power. The observations of Lissajous figure of applied voltage versus electric current was used for measuring energy deposited by discharge and also compared with calculated value. Lissajous figures clearly show that the energy deposited by discharge was dependent on applied voltage. The electron density of discharge was measured by power balance method. Electron density was found in the order of 1017 per cubic meter.

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10

Balasubramanian, Manjula, Anita Sebastian, Marie Peddinghaus, Gregory Fridman, Alexander Fridman, Alexander Gutsol, Gregory Friedman y Brooks Ari. "Dielectric Barrier Discharge Plasma in Coagulation and Sterilization." Blood 108, n.º 11 (16 de noviembre de 2006): 4043. http://dx.doi.org/10.1182/blood.v108.11.4043.4043.

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Abstract Rapid loss of blood, in the operating room or trauma, necessitates a need for hastening coagulation Attempts to hasten coagulation include electrocautery based on thermal plasma discharges. Although there have been other effective attempts to prevent further loss of blood via coagulation, tissue damage and dessication can occur as a result of the high temperatures 2. Our group has developed a method to initiate rapid coagulation with dielectric plasma discharge (cold). Initial experiments were performed using fresh blood from volunteers to compare time for coagulation of whole blood exposed to plasma, one minute versus 10 minutes. We tried same experiments on cut cadaver organs such as spleen and placenta which showed evidence of rapid coagulation compared to control without evidence of tissue damage. Our research team has developed a novel method using non-thermal dielectric barrier discharge plasma (DBD plasma) to coagulate blood and sterilize tissues without causing thermal damage. This treatment would be safe to patients because no exposed electrodes are involved and high frequency current (under 10 KHz) is kept below mili-ampere. Our experiments have shown that such plasma treatment hastens blood coagulation and causes simultaneous wound sterilization via a large concentration of chemically active species in plasma that are ions, radicals (O, OH, N) and electronically-excited atoms and molecules. A kinetic model of blood coagulation under influence of DBD plasma was constructed. The model assumes contact flux of positive ions from DBD plasma into the surface of the blood being treated. Once at the surface, these ions recombine, leading to formation of aqueous Hydrogen ions which catalyze the release of Calcium ions into the blood. The addition of Calcium ions to blood speeds up the coagulation process proportionally to the amount of ions added. The model demonstrates thrombin formation in the presence of DBD plasma peaking and occurring within significantly less time compared to thrombin formation without DBD plasma3. Such medically relevant demonstrations and mathematical explanations have allowed us to develop a portable device that may prove useful in situations where control of bleeding is crucial. In addition, because of the potential for simultaneous sterilization, this device may also help to decrease infections. This pioneering technology will find applicability in many clinical situations: sterilization of human tissue surfaces prior to surgery and sterilization of catheters, a well-known cause of morbidity in hospitals.

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11

Mora, E. Y., A. Sarmiento y E. Vera. "Alumina and quartz as dielectrics in a dielectric barrier discharges DBD system for CO2hydrogenation". Journal of Physics: Conference Series 687 (febrero de 2016): 012020. http://dx.doi.org/10.1088/1742-6596/687/1/012020.

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12

Li, Sen, Jiazhen Sun, Rui Sun, Jie Pan, Lin Wang, Chen Chen, Qiang Chen y Zhongwei Liu. "Spatiotemporal Characteristics of Radio Frequency Dielectric Barrier Glow Discharge at Atmospheric Pressure". Applied Sciences 11, n.º 18 (11 de septiembre de 2021): 8430. http://dx.doi.org/10.3390/app11188430.

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In this paper, argon was used in radio frequency (13.56 MHz) dielectric barrier discharge (rf-DBD) at atmospheric pressure. The IV curve was recorded after gas breakdown, and discharge photos were captured by ICCD camera. Discharges of α mode and γ mode were observed based on IV curve and ICCD photos. As the existence of negative glow in γ mode, the luminescence intensity of different position of the discharge gap was analyzed. It was found that in the α mode, the electron avalanche occurs from negative to positive and negative glow appeared after the discharge changed into γ mode. In every half cycle, the peak position of negative glow is 13 ± 1 ns later than that of electron avalanche on cathode surface.

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13

Zhang, Shen, Zhenli Chen, Binqian Zhang y Yingchun Chen. "Numerical Investigation on the Effects of Dielectric Barrier on a Nanosecond Pulsed Surface Dielectric Barrier Discharge". Molecules 24, n.º 21 (31 de octubre de 2019): 3933. http://dx.doi.org/10.3390/molecules24213933.

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In order to understand the impacts of dielectric barrier on the discharge characteristics of a nanosecond pulsed surface dielectric barrier discharge (NS-DBD), the effects of dielectric constant and dielectric barrier thickness are numerically investigated by using a three-equation drift–diffusion model with a 4-species 4-reaction air chemistry. When the dielectric constant increases, while the dielectric barrier thickness is fixed, the streamer propagation speed (V), the maximum streamer length (L), the discharge energy ( Q D _ e i ), and the gas heating ( Q G H ) of a pulse increase, but the plasma sheath thickness (h), the fast gas heating efficiency η , and the charge densities on the wall surface decrease. When the dielectric barrier thickness increases, while the dielectric constant is fixed, V, L, Q D _ e i , and Q G H of a pulse decrease, but h, η , and the charge densities on the wall surface increase. It can be concluded that the increase of the dielectric constant or the decrease of the dielectric barrier thickness results in the increase of the capacitance of the dielectric barrier, which enhances the discharge intensity. Increasing the dielectric constant and thinning the dielectric barrier layer improve the performance of the NS-DBD actuators.

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14

Vaziri, Nima, Ming-Jyh Chern, Tzyy-Leng Horng y Syamsuri Syamsuri. "Simulation of dielectric barrier discharge actuator at low Reynolds number". Aircraft Engineering and Aerospace Technology 92, n.º 4 (7 de marzo de 2020): 571–78. http://dx.doi.org/10.1108/aeat-09-2019-0184.

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Purpose The purpose of this study is to the modeling of the dielectric barrier discharge (DBD) actuator on the Eppler 387 (E387) airfoil in low Reynolds number conditions. Design/methodology/approach A validated direct-forcing immersed boundary method is used to solve the governing equations. A linear electric field model is used to simulate the DBD actuator. A ray-casting technique is used to define the geometry. Findings The purposed model is validated against the former studies. Next, the drag and lift coefficients in the static stall of the E387 airfoil are investigated. Results show that when the DBD actuator is on, both of the coefficients are increased. The effects of the location, applied voltage and applied frequency are also studied and find that the leading-edge actuator with higher voltage and frequency has better improvement in the forces. Finally, the dynamic stall of the E387 with the DBD actuator is considered. The simulation shows that generally when the DBD is on, the lift coefficient in the pitch-up section has lower values and in the pitch-down has higher values than the DBD off mode. Practical implications It is demonstrated that using the DBD actuator on E387 in the low Reynolds number condition can increase the lift and drag forces. Therefore, the application of the airfoil must be considered. Originality/value The results show that sometimes the DBD actuator has different effects on E387 airfoil in low Reynolds number mode than the general understanding of this tool.

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15

Zhang, Huan Xia y Li Wei. "Preparation, Performance and Analysis of Carbon Fibers with Dielectric Barrier Discharges Plasma Surface Treatment". Advanced Materials Research 391-392 (diciembre de 2011): 8–12. http://dx.doi.org/10.4028/www.scientific.net/amr.391-392.8.

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The deposition of coatings on the surface of carbon fiber will be helpful to their appli-cations. However, they are unsuitable to be deposited due to their low surface free energies, poor wettability and poor adhesions. The objective of this work is to modify carbon fibers by Dielect-ric barrier discharges (DBD) in ambient argon. The chemical and physical changes induced by the treatments on carbon fibers surface are examined using contact angle measurements and X-ray photoelectron spectroscopy (XPS). The interfacial adhesion of CF/EP composites are analysised by a single filament pull-out test. The contact angles of the plasma-treated samples are visibly reduced than the untreated samples. XPS results reveal that the carbon fibers modified with the DBD at an atmospheric pressure show a significant increase in oxygen-containing groups, such as C–O,C=O and O–C=O. The results of IFSS tests show that the treated carbon fibers composit-es could possess excellent interfacial properties with mixed resins. These results demonstrate that the surfaces of the carbon fibers samples are more active, hydrophilic and rough after plasma treatments using a DBD operating in ambient argon.

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16

Zhang, Jiao, Yanhui Wang y Dezhen Wang. "Period Multiplication in a Continuous Time Series of Radio-Frequency DBDs at Atmospheric Pressure". Communications in Computational Physics 11, n.º 4 (abril de 2012): 1226–35. http://dx.doi.org/10.4208/cicp.150710.051110s.

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AbstractAs a spatially extended dissipative system with strong nonlinearity the radio-frequency (rf) dielectric-barrier discharges (DBDs) at atmospheric pressure possess complex spatiotemporal nonlinear behaviors. In this paper, the time-domain nonlinear behaviors of rf DBD in atmospheric argon are studied numerically by a one-dimensional fluid model. Simulation results show that, under appropriate controlling parameters, the rf DBD can undergo a transition from single-period state to chaos through period doubling bifurcation with increasing discharge time, i.e., the regular periodic oscillation and chaos can coexist in a long time series of the atmospheric-pressure rf DBD. With increasing applied voltage amplitude, the duration of the periodic oscillation reduces gradually and chaotic zone increases, and finally the whole discharge series becomes completely chaotic state. This is different from conventional period doubling route to chaos. Moreover, the spatial characteristics of rf period-doubling discharge and chaos, as well as the parameter range of various discharge behaviors occurring are also investigated in this paper.

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17

., Yulastri, Ariadi Hazmi y Reni Desmiarti. "Aplikasi Plasma Dengan Metoda Dielectric Barrier Discharge (DBD) Untuk Pengolahan Limbah Cair Kelapa Sawit". Jurnal Nasional Teknik Elektro 2, n.º 2 (1 de septiembre de 2013): 46–50. http://dx.doi.org/10.20449/jnte.v2i2.85.

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18

Zhang, Huan Xia y Li Wei. "Control, Effection and Analysis of Voltage during Dielectric Barrier Discharges Plasma Surface Treated Carbon Fibers". Advanced Materials Research 472-475 (febrero de 2012): 342–49. http://dx.doi.org/10.4028/www.scientific.net/amr.472-475.342.

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The deposition of coatings on the surface of carbon fiber will be helpful to their applications. However, they are unsuitable to be deposited due to their low surface free energies, poor wettability and poor adhesions. The objective of this work is to modify carbon fibers by Dielectric barrier discharges(DBD)in ambient argon . The chemical and physical changes induced by the treatments on carbon fibers surface are examined using contact angle measurements and X-ray photoelectron spectroscopy (XPS). The interfacial adhesion of CF/EP composites are analyzed by a single ﬁber composite (SFC) for ﬁlament fragmentation test. The contact angles of the plasma-treated samples are visibly reduced than the untreated samples. XPS results reveal that the carbon fibers modified with the DBD at an atmospheric pressure show a significant increase in oxygen-containing groups, such as C–O,C=O and O–C=O. The results of SFC tests show that the treated carbon fibers composites could possess excellent interfacial properties with mixed resins. These results demonstrate that the surfaces of the carbon fibers samples are more active, hydrophilic and rough after plasma treatments using a DBD operating in ambient argon.

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Cao, Xiao Hua, Dong Yan Wang y Hai Hua Hu. "DBD Reactor Electric Field Distribution and Influence Factor". Applied Mechanics and Materials 295-298 (febrero de 2013): 1448–51. http://dx.doi.org/10.4028/www.scientific.net/amm.295-298.1448.

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As an effective method in automobile tail gas treatment, dielectric barrier discharge（DBD）is introduced. There are many parameters In DBD reactor that influence nitrogen oxide treatment reaction including discharge voltage, discharge frequency, discharge distance, gas influence and electrode structure. Discuss the influence of discharge voltage, discharge distance and medium thickness to electric field distribution in cylindrical DBD reactor through 2D numerical simulation

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20

Xiao, Hai Ping, Xu Du y Lei Wang. "Numerical Optimization Research on the Dielectric Barrier Discharge for NOx Removal". Advanced Materials Research 356-360 (octubre de 2011): 1238–43. http://dx.doi.org/10.4028/www.scientific.net/amr.356-360.1238.

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Numerical optimization research was made for the dielectric barrier discharge (DBD) reactor for NOx removal in order to improve the efficiency of the DBD reactor. In this paper, the optimization method proposed by our studying team was adopted to carry out the numerical optimization research on the discharge gap of the reactor. As a result, the breakdown strength of reactor was 44.8kV/cm at a 2mm discharge gap and the discharge started at 25μs. When the discharge gap increased to 8mm, the breakdown strength was 34.1kV/cm and the discharge time was 33μs. The removal rates under the two conditions varied little due to the similar electron mean energy, then experiment was conducted to validate the accuracy of the simulation. When the discharge gap increased, the gas handing capacity of the reactor got higher.Therefore, proper discharge gap has important influence on removal efficiency of NO during DBD.

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Jia, Jian Ping, Li Cai y Juan Lei. "Dielectric Barrier Discharge Used in Sewage Treatment Research under the Atmospheric Pressure". Applied Mechanics and Materials 539 (julio de 2014): 850–52. http://dx.doi.org/10.4028/www.scientific.net/amm.539.850.

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Dielectric barrier discharge (DBD) can produce non-thermal plasma under atmospheric pressure, which has broad prospect in sewage treatment technology. In this paper, the dielectric barrier discharge structure is designed and the coaxial discharge structure is used. The experiments show that the structure is safe and reliable. At the same time, it has low discharge power and can discharge uniformly. So, the plasma produced by dielectric barrier discharge can be convenient and easy to used in sewage treatment, and the result is effective.

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Dahle, Sebastian, Jure Žigon, Marko Petrič y Mirko Kariž. "Plasma treatment of spruce wood changes its dielectric properties". Les/Wood 69, n.º 2 (30 de diciembre de 2020): 83–95. http://dx.doi.org/10.26614/les-wood.2020.v69n02a03.

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The effects of dielectric barrier discharge (DBD) plasma treatment on the dielectric properties of Norway spruce wood (Picea abies (L.) Karst.) were investigated using dielectric analysis. Dielectric constant (i.e. permittivity) and loss coefficient were determined at various frequencies. The resulting changes on lamellae specimens of different thicknesses were compared with the change in mass and moisture content. A significant influence of the plasma was found, leading to an increase of the dielectric constant by about 2%, and a decrease of sample mass directly after the plasma treatment by approx. 14%, whereas a reduction in moisture content by only about 0.6% and a corresponding change in loss coefficient were detected. Overall, the mechanisms of the observed changes remain unclear and seem mainly uncorrelated with the hitherto known chemical changes in wood surfaces caused by similar plasma discharges.

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Kim, Jong Bong y Myoung Soo Shin. "An Investigation into the Effect of Design Parameters on Plasma Density in Dielectric Barrier Discharges (DBD)". Advanced Materials Research 742 (agosto de 2013): 469–75. http://dx.doi.org/10.4028/www.scientific.net/amr.742.469.

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DBD (Dielectric Barrier Discharges) plasma is often used to clean the surface of semiconductors. The cleaning performance is affected by many process parameters such as electric voltage, the gas composition, gas speed, thickness of the dielectric wall, gap distance, and plasma duration time. In this study, the plasma density is predicted by a coupled simulation of gas flow, chemistry mixing and reaction, plasma generation, and electric field. A 13.56 MHz RF source is used to generate plasma. The effect of the dielectric thickness, the gap distance, the gas flow velocity, and electric voltage on the plasma density is investigated. It is shown that the plasma density increases as the dielectric thickness decreases, the gap distance increases, the gas velocity increases, and electric voltage increases, respectively. Finally, experiments are carried out to verify the analysis results.

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Rong, Shaopeng, Yabing Sun, Zehua Zhao y Huiying Wang. "Dielectric barrier discharge induced degradation of diclofenac in aqueous solution". Water Science and Technology 69, n.º 1 (22 de octubre de 2013): 76–83. http://dx.doi.org/10.2166/wst.2013.554.

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A dielectric barrier discharge (DBD) reactor as one of the advanced oxidation processes was applied to the degradation of diclofenac in aqueous solution. The various parameters that affect the degradation of diclofenac and the proposed evolutionary process were investigated. The results indicated that the inner concentrations of 10 mg/L diclofenac can be all removed within 10 min under conditions of 50 W and pH value of 6.15. The existence of Fe2+ in the liquid phase can promote the degradation of diclofenac. But it was rather ineffective in mineralization, because the intermediates containing the aromatic rings were recalcitrant to be degraded. Five intermediates were identiﬁed by liquid chromatography-mass spectrometry (LC-MS), the OH · radical and O3 were the major reactive species, and played an important role in the degradation of diclofenac. The toxicity of diclofenac degraded by DBD was assessed and the results indicated the efficiency of the DBD in the detoxification of the diclofenac solution.

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Kumar, Naresh, Priyanka Shaw, Jamoliddin Razzokov, Maksudbek Yusupov, Pankaj Attri, Han Sup Uhm, Eun Ha Choi y Annemie Bogaerts. "Enhancement of cellular glucose uptake by reactive species: a promising approach for diabetes therapy". RSC Advances 8, n.º 18 (2018): 9887–94. http://dx.doi.org/10.1039/c7ra13389h.

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Kim, Y. H., T. Lho, S. M. Yoo y B. J. Lee. "Characteristics of Atmospheric Dielectric Barrier Discharge (DBD) Treated Water". Fusion Science and Technology 55, n.º 2T (febrero de 2009): 196–99. http://dx.doi.org/10.13182/fst09-a7012.

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Perisse, F., S. Menecier, E. Duffour, D. Vacher, G. Monier, J. F. Destrebecq, P. Czarniak, J. Górski y J. Wilkowski. "MDF treatment with a Dielectric Barrier Discharge (DBD) torch". International Journal of Adhesion and Adhesives 79 (diciembre de 2017): 18–22. http://dx.doi.org/10.1016/j.ijadhadh.2017.09.006.

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Whalley, Richard D. y Kwing-So Choi. "The starting vortex in quiescent air induced by dielectric-barrier-discharge plasma". Journal of Fluid Mechanics 703 (12 de junio de 2012): 192–203. http://dx.doi.org/10.1017/jfm.2012.206.

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AbstractThe flow field around an asymmetric dielectric-barrier-discharge (DBD) plasma actuator in quiescent air is studied using particle image velocimetry (PIV) and smoke-flow visualization. On initiation of DBD plasma a starting vortex is created, which rolls up to form a coherent structure. The starting vortex becomes self-similar when the maximum velocity induced by the DBD plasma actuator reaches a steady state. Here, the plasma jet momentum increases linearly with time, suggesting that the DBD plasma actuator entrains and accelerates the surrounding fluid with a constant force. The wall-parallel and wall-normal distances of the vortex core are observed to scale with ${t}^{2/ 3} $ as it travels at $3{1}^{\circ } $ to the wall. The velocity of the starting vortex is found to scale with ${t}^{- 1/ 3} $, while the circulation induced by the plasma actuator scales with ${t}^{1/ 3} $.

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Li, Yixiao, Zhenli Zhu, Hongtao Zheng, Lanlan Jin y Shenghong Hu. "Significant signal enhancement of dielectric barrier discharge plasma induced vapor generation by using non-ionic surfactants for determination of mercury and cadmium by atomic fluorescence spectrometry". Journal of Analytical Atomic Spectrometry 31, n.º 2 (2016): 383–89. http://dx.doi.org/10.1039/c5ja00300h.

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Widyastuti, Endrika y Aldila Daydeva. "APLIKASI TEKNOLOGI DIELECTRIC BARRIER DISCHARGE-UV PLASMA TERHADAP SIFAT FISIK DAN KIMIA TELUR AYAM (Gallus gallus domesticus)". BUANA SAINS 18, n.º 1 (3 de julio de 2018): 85. http://dx.doi.org/10.33366/bs.v18i1.942.

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Eggs are food that contains high nutrition, however egg products susceptible damage so preservation process is required. Dielectric Barrier Discharge (DBD) UV Plasma has proven very effective as an alternative technology to preserve fresh egg by inactivation bacteria and prevent contamination in a fresh egg. the aim of this study is to evaluated effect of Dielectric Barrier Discharge (DBD) UV Plasma on physical and chemical quality of chicken eggs (Gallus gallus domesticus). The fresh eggs were stored at room temperature and assessed for their Physical (Haugh unit and yolk index) and chemical properties (yolk pH, albumen pH, and egg nutrition) on 0, 5, 7, 11, and 14 days. Analysis of variance (ANOVA) was used to analyze significant difference among the samples. The result shows that DBD UV plasma can maintain haugh unit, yolk index, yolk pH, and albumen pH than control. The eggs treated with DBD UV recorded have no significant difference for egg nutrition.

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Wang, Zongyu, Hailang Kuang, Jifeng Zhang, Lilin Chu y Yulong Ji. "Nitrogen oxide removal by non-thermal plasma for marine diesel engines". RSC Advances 9, n.º 10 (2019): 5402–16. http://dx.doi.org/10.1039/c8ra09217f.

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32

Massima Mouele, Emile S., Jimoh O. Tijani, Kassim O. Badmus, Omoniyi Pereao, Omotola Babajide, Cheng Zhang, Tao Shao et al. "Removal of Pharmaceutical Residues from Water and Wastewater Using Dielectric Barrier Discharge Methods—A Review". International Journal of Environmental Research and Public Health 18, n.º 4 (10 de febrero de 2021): 1683. http://dx.doi.org/10.3390/ijerph18041683.

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Persistent pharmaceutical pollutants (PPPs) have been identified as potential endocrine disruptors that mimic growth hormones when consumed at nanogram per litre to microgram per litre concentrations. Their occurrence in potable water remains a great threat to human health. Different conventional technologies developed for their removal from wastewater have failed to achieve complete mineralisation. Advanced oxidation technologies such as dielectric barrier discharges (DBDs) based on free radical mechanisms have been identified to completely decompose PPPs. Due to the existence of pharmaceuticals as mixtures in wastewater and the recalcitrance of their degradation intermediate by-products, no single advanced oxidation technology has been able to eliminate pharmaceutical xenobiotics. This review paper provides an update on the sources, occurrence, and types of pharmaceuticals in wastewater by emphasising different DBD configurations previously and currently utilised for pharmaceuticals degradation under different experimental conditions. The performance of the DBD geometries was evaluated considering various factors including treatment time, initial concentration, half-life time, degradation efficiency and the energy yield (G50) required to degrade half of the pollutant concentration. The review showed that the efficacy of the DBD systems on the removal of pharmaceutical compounds depends not only on these parameters but also on the nature/type of the pollutant.

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Diop, Mame Andallah, Antoine Belinger y Hubert Piquet. "10 kV SiC MOSFET Evaluation for Dielectric Barrier Discharge Transformerless Power Supply". Plasma 3, n.º 3 (18 de agosto de 2020): 103–16. http://dx.doi.org/10.3390/plasma3030009.

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At low pressure, cold plasmas are used for a wide range of applications such as coating, flow control, or microelectronics. Currently, this industry requires expensive vacuum systems which consume energy and time, and therefore it is very appealing to develop similar processes at atmospheric pressure. Under this condition, dielectric barrier discharge (DBD) is one of the best ways to obtain a cold plasma. The dielectric barriers naturally limit the current, and then the plasma temperature. Unfortunately, at atmospheric pressure the discharge ignition between the electrodes requires high voltage, which is generally obtained through a step-up transformer. The parasitic elements of this device exclude a smart control for the discharge. In order to overcome this default, we analyze the performance of a transformerless power supply developed with a recently released single-chip high-voltage semiconductor. The circuit uses only two high-voltage switches synthesized by means of the 10 kV SiC MOSFET (Metal Oxide Semiconductor Field Effect Transistor). The design and implementation of the electric converter are presented and validated with experiments carried out on UV excimer DBD lamps. Then, the performances of the 10 kV SiC switches are analyzed and the relevance of this device for DBD applications is discussed.

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34

Tao, Xumei, Chao Sun, Liang Huang, Yuanyuan Han y Dongyan Xu. "Fe-MOFs prepared with the DBD plasma method for efficient Fenton catalysis". RSC Advances 9, n.º 11 (2019): 6379–86. http://dx.doi.org/10.1039/c8ra09211g.

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35

Zylka, Pawel. "Evaluation of Ozone Generation in Volume Spiral-Tubular Dielectric Barrier Discharge Source". Energies 13, n.º 5 (5 de marzo de 2020): 1199. http://dx.doi.org/10.3390/en13051199.

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Ozone, due to its high reactivity cannot be stockpiled, and thus requires to be generated on-demand. The paper reports on laboratory studies of O3 generation in a volume dielectric barrier discharge (DBD) tubular flow-through system with a coaxial-spiral electrode arrangement. Its performance is experimentally verified and compared to a commercial surface DBD O3 source fitted with a three-electrode floating supply arrangement. The presented volume DBD design is capable of steadily producing up to 4180 ppmv O3 at 1 Nl/min unprocessed atmospheric air intake and 10 kV 1.6 kHz sinusoidal high voltage supply corresponding to 67 g/kWh O3 production yield increasing to 93 g/kWh at 100 Nl/min air intake. The effects of high voltage supply tuning are also investigated and discussed together with finite element method simulation results.

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36

LING, YI-MING. "Study on breakdown characteristics of a low-pressure dielectric barrier discharge". Journal of Plasma Physics 73, n.º 3 (junio de 2007): 417–26. http://dx.doi.org/10.1017/s0022377806004715.

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AbstractThe breakdown characteristics of a low-frequency dielectric barrier discharge (DBD) at low pressure are investigated experimentally in He, Ne and Ar. The current waveform of this DBD, a series of pulses, is caused by the results of the electron avalanches under the action of the applied field and the quenching effect of the wall-charge field on the avalanches. Taking into consideration the diffusion loss of the charged particles in the breakdown processes, the experimental investigation and the theoretical analysis of its breakdown characteristics indicate that its breakdown voltage is higher than the calculation by the Paschen law and depends on the filled-gas pressure and the distance between the electrodes, instead of their product. The ion-induced secondary electron emission coefficient and the mean electron energy at the moment of breakdown can also be determined approximately by measuring the breakdown characteristics of the discharge tubes with different distances between the electrodes and combining the theoretical deductions. The experimental results and the theoretical analysis of the breakdown characteristics of this DBD are discussed.

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37

Knust, Steffen, Andreas Kuhlmann, Teresa de los Arcos y Guido Grundmeier. "Surface modification of ZnMgAl-coated steel by dielectric-barrier discharge plasma". RSC Advances 9, n.º 60 (2019): 35077–88. http://dx.doi.org/10.1039/c9ra07378g.

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38

Sludnova, Alena, Nikolay Mironov y Paul Mikheyev. "Study of a dielectric barrier discharge burner for plasma assisted combustion". MATEC Web of Conferences 209 (2018): 00028. http://dx.doi.org/10.1051/matecconf/201820900028.

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In this short communication we report the results of measurements of the number densities of O3, NO and NO2 in the afterglow of a dielectric barrier discharge. Detailed modelling of plasma processes in a DBD is a challenging task and this data is necessary for verification of numerical model. The DBD in air produced only [O3] up to ~1016 cm-3 and [NO] up to ~5×1014 cm-3 that increased with discharge power linearly. In air fuel mixtures [O3] was an order of magnitude smaller, it decreased with [CH4]. In methane-air mixture NO was not detected, but [NO2] up to ~1015 cm-3 appeared instead.

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39

Pal, U. N., M. Kumar, H. Khatun y A. K. Sharma. "Discharge characteristics of dielectric barrier discharge (DBD) based VUV/UV sources". Journal of Physics: Conference Series 114 (1 de mayo de 2008): 012065. http://dx.doi.org/10.1088/1742-6596/114/1/012065.

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40

Li, Shaobo, Zhaofeng Wang, Hanmei Jiang, Limei Zhang, Jingzheng Ren, Mingtao Zheng, Lichun Dong y Luyi Sun. "Plasma-induced highly efficient synthesis of boron doped reduced graphene oxide for supercapacitors". Chemical Communications 52, n.º 73 (2016): 10988–91. http://dx.doi.org/10.1039/c6cc04052g.

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41

Kostov, K. G., V. Rocha, C. Y. Koga-Ito, B. M. Matos, M. A. Algatti, R. Y. Honda, M. E. Kayama y R. P. Mota. "Bacterial sterilization by a dielectric barrier discharge (DBD) in air". Surface and Coatings Technology 204, n.º 18-19 (junio de 2010): 2954–59. http://dx.doi.org/10.1016/j.surfcoat.2010.01.052.

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42

Tyl, Clémence, Stéphane Martin, Céline Combettes, Gilles Brillat, Vincent Bley, Antoine Belinger, Simon Dap, Ronny Brandenburg y Nicolas Naudé. "New local electrical diagnostic tool for dielectric barrier discharge (DBD)". Review of Scientific Instruments 92, n.º 5 (1 de mayo de 2021): 053552. http://dx.doi.org/10.1063/5.0045654.

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43

Jia, Jian Ping, Li Cai, Shou Bo Zhang y Yuan Zhao. "Dielectric Barrier Discharge Structure Design for Sewage Treatment". Advanced Materials Research 1037 (octubre de 2014): 57–60. http://dx.doi.org/10.4028/www.scientific.net/amr.1037.57.

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The problem of the urban water shortage and water pollution is becoming problem more and more serious. Therefore, governments around the world pay close attention to the application of sewage treatment technology, especially that with high efficiency, low energy consumption and strong operability. Dielectric barrier discharge (DBD) can produce low temperature plasma under atmospheric pressure, and the application of the technology for sewage treatment research gradually becomes to be one of hot research. In this paper, the dielectric barrier discharge structure is designed, and the plasma produced is used for sewage treatment research. The system adopts coaxial type discharge structure. The research shows that the structure is safe and reliable. And, it has low discharge power and can discharge uniformly. So, the plasma produced by dielectric barrier discharge can be convenient and easy to used in sewage treatment, and the result is effective.

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44

Getnet, Tsegaye Gashaw, Milton E. Kayama, Elidiane C. Rangel y Nilson C. Cruz. "Thin Film Deposition by Atmospheric Pressure Dielectric Barrier Discharges Containing Eugenol: Discharge and Coating Characterizations". Polymers 12, n.º 11 (16 de noviembre de 2020): 2692. http://dx.doi.org/10.3390/polym12112692.

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Eugenol (4-Allyl-2-methoxyphenol) is the main constituent of clove oil. In addition to being widely used as a condiment, it has been recognized as a powerful bactericide. Owing to that, Eugenol has been used in several applications including odontology and as a conservative for food products. Aiming at the development of natural bactericide coatings, in this work, using an atmospheric pressure plasma in a dielectric barrier discharge (DBD) reactor Eugenol was deposited on stainless steel substrate, with argon as a carrier gas. The discharge power supply was a transformer at 14.4 kV peak-to-peak voltage and 60 Hz frequency. Operating with a gas flow rate at 4 L/min, the active power was around 1.2 W. The maximum plasma electron temperature of the plasma with monomers was about 1.5 eV, estimated by visible emission spectroscopy using a local thermodynamic equilibrium approach. The study also comprehended the analysis of the film structure, aging, and thermal stability using infrared reflectance spectroscopy, and its thicknesses and roughness by profilometry. The thickness of the films was in the range of 1000 to 2400 nm with a roughness of up to 800 nm with good adhesion on the substrate. The FTIR result shows a stable coating with a chemical structure similar to that of the monomer. Aging analysis showed that the film does not degrade, even after exposing the film for 120 days in ambient air and for 1.0 h under a high thermal UV-lamp.

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45

Li, Yingying, Rida Atif, Ketao Chen, Jiushan Cheng, Qiang Chen, Zhen Qiao, Gregory Fridman, Alex Fridman y Hai-Feng Ji. "Polymerization of D-Ribose in Dielectric Barrier Discharge Plasma". Plasma 1, n.º 1 (26 de julio de 2018): 144–49. http://dx.doi.org/10.3390/plasma1010013.

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Dielectric barrier discharge (DBD) plasma has been found to uniquely polymerize ribose that is not usually subject to polymerization since molecules that tend to polymerize almost always possess at least a π-bond. The polymer was analyzed via nuclear magnetic resonance (NMR) spectra, matrix-assisted laser desorption ionization time-of-flight (MALDI TOF) mass spectroscopy and Fourier-Transform inferred spectroscopy (FTIR), and it was found that dehydration occurs during polymerization.

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46

Choi, Man-Seok, Eun Bi Jeon, Ji Yoon Kim, Eun Ha Choi, Jun Sup Lim, Jinsung Choi, Kwang Soo Ha, Ji Young Kwon, Sang Hyeon Jeong y Shin Young Park. "Virucidal Effects of Dielectric Barrier Discharge Plasma on Human Norovirus Infectivity in Fresh Oysters (Crassostrea gigas)". Foods 9, n.º 12 (25 de noviembre de 2020): 1731. http://dx.doi.org/10.3390/foods9121731.

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This study investigates the effects of dielectric barrier discharge (DBD) plasma treatment (1.1 kV, 43 kHz, N2 1.5 L/min, 10~60 min) on human norovirus (HuNoV) GII.4 infectivity in fresh oysters. HuNoV viability in oysters was assessed by using propidium monoazide (PMA) as a nucleic acid intercalating dye before performing a real-time reverse transcription–quantitative polymerase chain reaction (RT-qPCR). Additionally, the impact of the DBD plasma treatment on pH and Hunter colors was assessed. When DBD plasma was treated for 60 min, the HuNoV genomic titer reduction without PMA pretreatment was negligible (<1 log copy number/µL), whereas when PMA treatment was used, HuNoV titer was reduced to >1 log copy number/µL in just 30 min. D1 and D2-value of HuNoV infectivity were calculated as 36.5 and 73.0 min of the DBD plasma treatment, respectively, using the first-order kinetics model (R2 = 0.98). The pH and Hunter colors were not significantly different (p > 0.05) between the untreated and DBD-plasma-treated oysters. The results suggest that PMA/RT-qPCR could help distinguish HuNoV infectivity without negatively affecting oyster quality following >30 min treatment with DBD plasma. Moreover, the inactivation kinetics of nonthermal DBD plasma against HuNoV in fresh oysters might provide basic information for oyster processing and distribution.

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47

Tao, Xumei, Xinjie Yuan, Liang Huang, Shuyong Shang y Dongyan Xu. "Fe-based metal–organic frameworks as heterogeneous catalysts for highly efficient degradation of wastewater in plasma/Fenton-like systems". RSC Advances 10, n.º 60 (2020): 36363–70. http://dx.doi.org/10.1039/d0ra07402k.

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48

Montazersadgh, Faraz, Alexander Wright, Junchen Ren, Alexander Shaw, Gabriele Neretti, Hemaka Bandulasena y Felipe Iza. "Influence of the On-time on the Ozone Production in Pulsed Dielectric Barrier Discharges". Plasma 2, n.º 1 (4 de marzo de 2019): 39–50. http://dx.doi.org/10.3390/plasma2010005.

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Understanding the production mechanisms of ozone and other reactive species in atmospheric pressure dielectric barrier discharges (DBDs) has become increasingly important for the optimization and commercial success of these plasma devices in emerging applications, such as plasma medicine, plasma agriculture, and plasma catalysis. In many of these applications, input power modulation is exploited as a means to maintain a low gas temperature. Although the chemical pathways leading to ozone production/destruction and their strong temperature dependence are relatively well understood, the effect of the on-time duration on the performance of these modulated DBDs remains largely unexplored. In this study, we use electrical and optical diagnostics, as well as computational methods, to assess the performance of a modulated DBD device. The well-established Lissajous method for measuring the power delivered to the discharge is not suitable for modulated DBDs because the transients generated at the beginning of each pulse become increasingly important in short on-time modulated plasmas. It is shown that for the same input power and modulation duty-cycle, shorter on-time pulses result in significantly enhanced ozone production, despite their operation at slightly higher temperatures. The key underpinning mechanism that causes this counter-intuitive observation is the more efficient net generation rate of ozone during the plasma on-time due to the lower accumulation of NO2 in the discharge volume.

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49

Nawaz, Muhammad Imran, Chengwu Yi, Prince Junior Asilevi, Tingting Geng, Muhammad Aleem, Abdul Mannan Zafar, Ahmad Azeem y Huijuan Wang. "A Study of the Performance of Dielectric Barrier Discharge under Different Conditions for Nitrobenzene Degradation". Water 11, n.º 4 (22 de abril de 2019): 842. http://dx.doi.org/10.3390/w11040842.

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Water scarcity and water contamination due to the extensive use of organic compounds in industries trigger us to adopt modern techniques for wastewater treatment. In this research, we developed a new dielectric barrier discharge (DBD) system which was evaluated for the degradation of nitrobenzene in water under different experimental arrangements. DBD produces an enormous amount of active species like O3, •O, O2+ and O2− and •OH to degrade the pollutants. In this study, NB (Nitrobenzene) was treated from wastewater by changing the gas flow rate, adopting different carrier gas, by adding inhibitors and promoters and the effect of applied voltage on the production of active species to check the effectiveness of the DBD system. The DBD system was evaluated based on input power, degradation efficiency and energy yield compared with other advanced oxidation processes. The energy yield of the DBD system was 1.253 mg/kWh for the degradation of 20 mg/L of NB to 75% in 60 min with the discharge power of 0.538 W, which displays better results in comparison with the other AOPs regarding energy yield and the degradation efficiency of the pollutant. The results illustrate the significance of the system and further suggest its application to industrial-scale treatment.

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50

Shahrbabaki, A. Nazarian, M. Bazazzadeh y R. Khoshkhoo. "Investigation on Supersonic Flow Control Using Nanosecond Dielectric Barrier Discharge Plasma Actuators". International Journal of Aerospace Engineering 2021 (14 de julio de 2021): 1–14. http://dx.doi.org/10.1155/2021/2047162.

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In this paper, the effects of streamwise Nanosecond Dielectric Barrier Discharge (NS-DBD) actuators on Shock Wave/Boundary Layer Interaction (SWBLI) are investigated in a Mach 2.5 supersonic flow. In this regard, the numerical investigation of NS-DBD plasma actuator effects on unsteady supersonic flow passing a 14° shock wave generator is performed using simulation of Navier-Stokes equations for 3D-flow, unsteady, compressible, and k ‐ ω SST turbulent model. In order to evaluate plasma discharge capabilities, the effects of plasma discharge length on the flow behavior are studied by investigating the flow friction factor, the region of separation bubble formation, velocity, and temperature distribution fields in the SWBLI region. The numerical results showed that plasma discharge increased the temperature of the discharge region and boundary layer temperature in the vicinity of flow separation and consequently reduced the Mach number in the plasma discharge region. Plasma excitation to the separation bubbles shifted the separation region to the upstream around 6 mm, increased SWBLI height, and increased the angle of the separation shock wave. Besides, the investigations on the variations of pressure recovery coefficient illustrated that plasma discharge to the separation bubbles had no impressive effect and decreased pressure recovery coefficient. The numerical results showed that although the NS-DBD plasma actuator was not effective in reducing the separation area in SWBLI, they were capable of shifting the separation shock position upstream. This feature can be used to modify the structure of the shock wave in supersonic intakes in off-design conditions.

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