Carbon-encapsulated iron nanoparticles used to generate magnetic field and to enhance substrate transport at electrode surface

2012 ◽  
Vol 20 ◽  
pp. 4-6 ◽  
Author(s):  
Anna M. Nowicka ◽  
Agata Kowalczyk ◽  
Michal Bystrzejewski ◽  
Mikolaj Donten ◽  
Zbigniew Stojek
Keyword(s):  
Magnetic Field ◽  
Electrode Surface ◽  
Iron Nanoparticles ◽  
Substrate Transport

Desorption of hydrogen from an electrode surface under influence of an external magnetic field – In-situ microscopic observations

2009 ◽  
Vol 11 (2) ◽  
pp. 425-429 ◽  
Author(s):  
Jakub Adam Koza ◽  
Sascha Mühlenhoff ◽  
Margitta Uhlemann ◽  
Kerstin Eckert ◽  
Annett Gebert ◽  
...  
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Electrode Surface

Iron nanoparticles augmented chemodynamic effect by alternative magnetic field for wound disinfection and healing

2020 ◽  
Vol 324 ◽  
pp. 598-609
Author(s):  
Fei Gao ◽  
Xiaolian Li ◽  
Tingbin Zhang ◽  
Anujit Ghosal ◽  
Guifeng Zhang ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Iron Nanoparticles ◽  
Alternative Magnetic Field

scholarly journals Shape Effects of Iron Nanowires on Hyperthermia Treatment

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Wei-Syuan Lin ◽  
Hong-Ming Lin ◽  
Hsiang-Hsin Chen ◽  
Yeu-Kuang Hwu ◽  
Yuh-Jing Chiou
Keyword(s):  
Magnetic Field ◽  
Magnetic Anisotropy ◽  
Material Properties ◽  
Iron Nanoparticles ◽  
Magnetic Hyperthermia ◽  
Hyperthermia Treatment ◽  
One Dimensional ◽  
Heating Efficiency ◽  
Shape Effects ◽  
Iron Nanowires

This research discusses the influence of morphology of nanomagnetic materials (one-dimensional iron nanowires and zero-dimensional iron nanoparticles) on heating efficiency of the hyperthermia treatment. One-dimensional iron nanowires, synthesized by reducing method in external magnetic field, are explored in terms of their material properties, magnetic anisotropy, and cytotoxicity of EMT-6 cells. The magnetic anisotropy of an array of nanowires is examined in parallel and perpendicular magnetic fields by VSM. For the magnetic hyperthermia treatment tests, iron nanowires and nanoparticles with different concentrations are heated in alternating magnetic field to measure their actual heating efficiency and SLP heating properties. The shape effects of iron nanomaterials can be revealed from their heating properties. The cytotoxicity of nanowires with different concentrations is measured by its survival rate in EMT-6 with the cells cultivated for 6 and 24 hours.

Magnetic Field Effect on the Hydronium Diffusivity at an Enzymatic Biofuel Cell Anode via Atomistic Analysis

2009 ◽  
Vol 7 (2) ◽  
Author(s):  
C. P. Chiu ◽  
C. W. Hong
Keyword(s):  
Magnetic Field ◽  
Constant Magnetic Field ◽  
Glucose Concentration ◽  
Electrode Surface ◽  
Magnetic Field Effect ◽  
Biofuel Cell ◽  
Enzymatic Biofuel Cell ◽  
Hydronium Ions ◽  
Anode Electrode ◽  
Cell Anode

This paper investigates how a constant magnetic field between the anode catalyst and the electrode surface affects the performance of an enzymatic biofuel cell. Molecular dynamics techniques were employed to observe the nanoscale proton transport phenomenon. The simulation model comprised a Au electrode, pyrroloquinoline quinine, flavin adenine dinucleotide, and glucose macromolecules with hydronium ions in aqueous solution. A constant magnetic field was applied parallel to the anode electrode surface in the simulation process. It is found that the magnetic field is able to enhance the hydronium mobility in the solution and the rate of the biochemical reaction increased. Simulation results show that the hydronium diffusivity increases from 3.80×10−9 m2/s to a maximum 19.91×10−9 m2/s at a glucose concentration of 27 mM and from 13.02×10−9 m2/s to a maximum 36.44×10−9 m2/s at a glucose concentration of 82 mM.

scholarly journals Study of the iron nanoparticles phase transformation during thermal annealing

2017 ◽  
pp. 16-25
Author(s):  
Artem Kozlovskiy ◽  
Jumat Kargin ◽  
Malik Kokarev ◽  
Daut Mukhambetov
Keyword(s):  
Magnetic Field ◽  
Heat Treatment ◽  
Phase Transformation ◽  
Phase Composition ◽  
Iron Oxide ◽  
Magnetic Anisotropy ◽  
Hysteresis Loop ◽  
Iron Nanoparticles ◽  
Oxide Phases ◽  
The Magnetic Field

Change in structural properties and phase composition of nanoparticles based on iron oxide was researched in the paper. As a result of conducted studies it was found that during heat treatment oxide phases of (γ-Fe2O3) and α-Fe2O3 maghemite were formed in oxygen atmosphere. Researches of powder array magnetization were showed that the hysteresis loop movement had the form characteristic for ferromagnetic materials. Additionally, loops obtained at different directions of the magnetic field have different characters, which indicate the magnetic anisotropy presence in the samples.

scholarly journals Photoactivatable nanoCRISPR/Cas9 System Based on crRNA Reversibly Immobilized on Carbon Nanoparticles

2021 ◽  
Vol 22 (20) ◽  
pp. 10919
Author(s):  
Olga Semikolenova ◽  
Lubov Sakovina ◽  
Elizaveta Akhmetova ◽  
Daria Kim ◽  
Ivan Vokhtantsev ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Uv Irradiation ◽  
Functional Activity ◽  
Carbon Nanoparticles ◽  
Gene Editing ◽  
Iron Nanoparticles ◽  
Controlled Delivery ◽  
Target Cells ◽  
The Novel ◽  
New Approach

Here, we proposed a new approach to engineering a photoactivatable CRISPR/Cas9 gene-editing system. The novel nanoCRISPR/Cas9 system is based on the use of auxiliary photocleavable oligodeoxyribonucleotides (PC-DNAs) complementary to crRNA. PC-DNAs contained up to three UV-sensitive linkers made of 1-(2-nitrophenyl)-1,2-ethanediol inside the oligonucleotide chain. Immobilizing PC-DNAs on the surface of carbon nanoparticles through 3′-terminal pyrene residue provided sufficient blocking of crRNA (and corresponding Cas9 activity) before UV irradiation and allows for crRNA release after UV irradiation at 365 nm, which restores Cas9 activity. We optimized the length of blocking photocleavable oligonucleotide, number of linkers, time of irradiation, and the type of carbon nanoparticles. Based on the results, we consider the nanoCRISPR/Cas9 system involving carbon-encapsulated iron nanoparticles the most promising. It provides the greatest difference of functional activity before/after irradiation and can be used in prospective for magnetic field-controlled delivery of CRISPR system into the target cells or tissues and spatiotemporal gene editing induced by UV irradiation.

scholarly journals The effects of a magnetic field on the morphologies of nickel and copper deposits: The concept of "effective overpotential"

2007 ◽  
Vol 72 (8-9) ◽  
pp. 787-797 ◽  
Author(s):  
Nebojsa Nikolic
Keyword(s):  
Magnetic Field ◽  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Magnetic Fields ◽  
Applied Magnetic Field ◽  
Electrode Surface ◽  
Copper Deposits ◽  
Perpendicular Orientation ◽  
The Magnetic Field ◽  
Scanning Electron

The morphologies of nickel and copper deposits obtained without applied magnetic fields, and with both parallel and perpendicular applied magnetic fields were examined by the scanning electron microscopy (SEM) technique. Changes in the morphologies of the metals caused by the effect of the magnetic fields are explained by the concept of "effective overpotential". The morphologies of the nickel and copper deposits obtained under parallel oriented magnetic fields were similar to those obtained at some lower cathodic potentials without an applied magnetic field. The magnetic field with a perpendicular orientation to the electrode surface increased the dispersity of the nickel and copper deposits. Nickel and copper deposits obtained under this orientation of the magnetic field were similar to those obtained at some higher cathodic potentials without an applied magnetic field. .

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