scholarly journals Characteristics of Bipolar Nanosecond Discharges in Air Formed in the Electrode System “BLADE-SURFACE of Nonmetallic Liquid -BLADE”

2020 ◽  
Author(s):  
Alexander Shuaibov ◽  
Alexander Minya ◽  
Igor Shevera ◽  
Antonina Malinina ◽  
Roksolana Gritsak ◽  
...  
Keyword(s):  
Barrier Discharge ◽  
Metal Oxide Nanoparticles ◽  
Electrode System ◽  
Distilled Water ◽  
High Current ◽  
Blade Surface ◽  
Colloidal Solutions ◽  
Electrolyte Surface ◽  
Uniform Plasma ◽  
Macroscopic Amount

Curcumin The design of the device for producing a high-current, bipolar nanosecond discharge over the surface of a non-metallic liquid (water, electrolytes, alcohols, etc.) in air is given. Air pressure is ranged from 5 to 101 kPa. The distance between the tip of the blade and the surface of water or liquid (5% solution of copper sulfate in distilled water) was 4 mm, and the distance between parallel metal blades was 40 mm. The conditions for uniform plasma overlapping of the electrolyte surface between the metal blades are established. The spatial, electrical, and optical characteristics of the discharge are investigated. It is shown that the discharge under study allows obtaining colloidal solutions of copper nanoparticles in distilled water in a macroscopic amount (1 liter or more). The developed reactor is of interest for use in poisonous chemical solution disinfection systems, solutions based on dangerous bacteria and viruses for which the use of traditional systems with a point spark discharge or a barrier discharge becomes ineffective. The rector is also promising for the synthesis of colloidal solutions of transition metal oxide nanoparticles from solutions of the corresponding salts. These solutions can be used in micro-nanotechnology and for antibacterial treatment of plants in greenhouses, processing of medical instruments and materials.

scholarly journals Development of Antibacterial Protective Coatings Active against MSSA and MRSA on Biodegradable Polymers

Polymers ◽  
2021 ◽  
Vol 13 (4) ◽  
pp. 659
Author(s):  
Iva Rezić ◽  
Mislav Majdak ◽  
Vanja Ljoljić Bilić ◽  
Ivan Pokrovac ◽  
Lela Martinaga ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Biodegradable Polymers ◽  
Chronic Wounds ◽  
Protective Coatings ◽  
Metal Oxide Nanoparticles ◽  
Colloidal Solutions ◽  
Fused Deposition ◽  
Antimicrobial Nanoparticles ◽  
Mrsa Strains

In this work the in vitro antimicrobial activity of colloidal solutions of nine different commercially available nanoparticles were investigated against Staphylococcus aureus strains, both methicillin-sensitive (MSSA) and methicillin-resistant (MRSA). Research covered antimicrobial investigation of different metal and metal-oxide nanoparticles, including Ag 10 nm, Ag 40 nm, Al2O3 100 nm, Au 20 nm, Pt 4 nm, TiO2 100 nm, Y2O3 100 nm, ZnO 100 nm and ZrO2 100 nm nanoparticles. Such materials were foreseen to be applied as coatings on 3D-printed biodegradable polymers: i.e., catheters, disposable materials, hospital bedding items, disposable antimicrobial linings and bandages for chronic wounds. Therefore, the antimicrobial activity of the nanoparticles was determined by agar well diffusion assays and serial microdilution broth assays. In addition, the chromatographic characterization of elements present in trace amounts was performed as a method for tracing the nanoparticles. Moreover, the potential of preparing the rough surface of biodegradable polymers for coating with antimicrobial nanoparticles was tested by 3D-printing fused deposition methodology. The in vitro results have shown that particular nanoparticles provided powerful antimicrobial effects against MSSA and MRSA strains, and can be easily applied on different biopolymers.

scholarly journals Infrared gas phase study on plasma-polymer interactions in high-current diffuse dielectric barrier discharge

2017 ◽  
Vol 121 (24) ◽  
pp. 243301 ◽  
Author(s):  
Y. Liu ◽  
S. Welzel ◽  
S. A. Starostin ◽  
M. C. M. van de Sanden ◽  
R. Engeln ◽  
...  
Keyword(s):  
Gas Phase ◽  
Dielectric Barrier Discharge ◽  
Barrier Discharge ◽  
Plasma Polymer ◽  
High Current ◽  
Dielectric Barrier ◽  
Phase Study ◽  
Polymer Interactions

scholarly journals High current diffuse dielectric barrier discharge in atmospheric pressure air for the deposition of thin silica-like films

2010 ◽  
Vol 96 (6) ◽  
pp. 061502 ◽  
Author(s):  
S. A. Starostin ◽  
P. Antony Premkumar ◽  
M. Creatore ◽  
H. de Vries ◽  
R. M. J. Paffen ◽  
...  
Keyword(s):  
Dielectric Barrier Discharge ◽  
Atmospheric Pressure ◽  
Barrier Discharge ◽  
High Current ◽  
Dielectric Barrier

The burning voltage of a high-current vacuum arc in a six-cap rod electrode system

1997 ◽  
Vol 25 (4) ◽  
pp. 586-592 ◽  
Author(s):  
D.F. Alferov ◽  
N.I. Korobova ◽  
V.A. Sidorov
Keyword(s):  
Electrode System ◽  
Vacuum Arc ◽  
High Current ◽  
Burning Voltage

scholarly journals General Synthesis of Ultrafine Metal Oxide/Reduced Graphene Oxide Nanocomposites for Ultrahigh-Flux Nanofiltration Membrane

2021 ◽  
Author(s):  
Wanyu Zhang ◽  
Hai Xu ◽  
Fei Xie ◽  
Xiaohua Ma ◽  
Bo Niu ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Metal Oxide ◽  
Reduced Graphene Oxide ◽  
Active Sites ◽  
Metal Oxide Nanoparticles ◽  
Water Flux ◽  
Size Exclusion ◽  
Colloidal Solutions ◽  
Ultrafine Metal ◽  
Reduced Graphene

Abstract Graphene-based membranes have great potential to revolutionize nanofiltration technology, but achieving high solute rejections at high water flux remains extremely challenging. Herein, a family of ultrafine metal oxide/reduced graphene oxide (rGO) nanocomposites are synthesized through a heterogenous nucleation and diffusion-controlled growth process for dye nanofiltration. The synthesis is based on the utilization of oxygen functional groups on GO surface as preferential active sites for heterogeneous nucleation, leading to the formation of sub-3nm size, monodispersing as well as high-density loading of metal oxide nanoparticles. The anchored ultrafine nanoparticles could inhibit the wrinkling of the rGO nanosheet, forming highly stable colloidal solutions for solution-processing fabrication of nanofiltration membranes. By functioning as pillars, the nanoparticles remarkably increase both vertical interlayer spacing and lateral tortuous paths of the rGO membranes, offering an unprecedented water permeability of 225 L m− 2 h− 1 bar − 1 and a high selectivity up to 98% in the size-exclusion separation of methyl blue.

scholarly journals Characteristics of high current nanosecond discharge in the air above surface the copper sulfate solution in distilled water

2017 ◽  
Vol 41 (0) ◽  
pp. 112-119
Author(s):  
Ігор Васильович Шевера ◽  
Владислав Валерійович Данило ◽  
Золтан Тиборович Гомокі ◽  
Олександр Йосипович Миня ◽  
Олександр Камілович Шуаібов ◽  
...  
Keyword(s):  
Copper Sulfate ◽  
Sulfate Solution ◽  
Distilled Water ◽  
Nanosecond Discharge ◽  
High Current ◽  
Copper Sulfate Solution

Volume-surface barrier discharge in dried air in three-electrode system fed by impulse high voltage with nanosecond rise time

2016 ◽  
Vol 75 (2) ◽  
pp. 24705 ◽  
Author(s):  
Maxim Malashin ◽  
Igor Rebrov ◽  
Sergey Nebogatkin ◽  
Marina Sokolova ◽  
Alexey Nikitin ◽  
...  
Keyword(s):  
High Voltage ◽  
Rise Time ◽  
Barrier Discharge ◽  
Electrode System ◽  
Surface Barrier ◽  
Surface Barrier Discharge ◽  
Impulse High Voltage
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