scholarly journals Magnetoelastoelectric coupling in core–shell nanoparticles enabling directional and mode-selective magnetic control of THz beam propagation

Nanoscale ◽  
2017 ◽  
Vol 9 (35) ◽  
pp. 13052-13059 ◽  
Author(s):  
Moumita Dutta ◽  
Kamaraju Natarajan ◽  
Soutik Betal ◽  
Rohit P. Prasankumar ◽  
Amar S. Bhalla ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Phase Modulation ◽  
Beam Propagation ◽  
Core Shell ◽  
Magnetic Control ◽  
Magnetic Field Direction ◽  
Mode Switch ◽  
Shell Nanoparticles ◽  
Modulation Mode ◽  
Core Shell Nanoparticles

Magnetoelastoelectric coupling in engineered biphasic core–shell nanocomposites demonstrates a dynamically tunable magnetic-field direction defined THz amplitude/phase modulation mode-switch.

scholarly journals Carbon-coated Fe3O4 core–shell super-paramagnetic nanoparticle-based ferrofluid for heat transfer applications

2021 ◽  
Author(s):  
Mohd Imran ◽  
Nasser Zouli ◽  
Tansir Ahamad ◽  
Saad M. Alshehri ◽  
Mohammed Rehaan Chandan ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Heat Transfer ◽  
Thermal Conductivity ◽  
External Magnetic Field ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Carbon Coated ◽  
Core Shell Nanoparticles ◽  
Fe3o4 Core

Ferrofluids prepared by dispersing superparamagnetic Fe3O4@C core–shell nanoparticles in water exhibited exceptional enhancement in thermal conductivity without an external magnetic field.

Magnetic-field-induced self-assembly of FeCo/CoFe2O4 core/shell nanoparticles with tunable collective magnetic properties

Nanoscale ◽  
2021 ◽  
Vol 13 (8) ◽  
pp. 4519-4529
Author(s):  
J. Mohapatra ◽  
J. Elkins ◽  
M. Xing ◽  
D. Guragain ◽  
Sanjay R. Mishra ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Magnetic Properties ◽  
Physical Properties ◽  
Self Assembly ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Novel Approach ◽  
Core Shell Nanoparticles

Self-assembly of nanoparticles into ordered patterns is a novel approach to build up new consolidated materials with desired collective physical properties.

scholarly journals Core-Shell Nanostructure ofα-Fe2O3/Fe3O4: Synthesis and Photocatalysis for Methyl Orange

2011 ◽  
Vol 2011 ◽  
pp. 1-5 ◽  
Author(s):  
Yang Tian ◽  
Di Wu ◽  
Xiao Jia ◽  
Binbin Yu ◽  
Sihui Zhan
Keyword(s):  
Magnetic Field ◽  
Magnetic Properties ◽  
Methyl Orange ◽  
Molten Salts ◽  
Surface Oxidation ◽  
The Self ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Core Shell Nanoparticles

Fe3O4nanoparticle was synthesized in the solution involving water and ethanol. Then,α-Fe2O3shell was produced in situ on the surface of theFe3O4nanoparticle by surface oxidation in molten salts, formingα-Fe2O3/Fe3O4core-shell nanostructure. It was showed that the magnetic properties transformed from ferromagnetism to superparamagnetism after the primaryFe3O4nanoparticles were oxidized. Furthermore, the obtainedα-Fe2O3/Fe3O4core-shell nanoparticles were used to photocatalyse solution of methyl orange, and the results revealed thatα-Fe2O3/Fe3O4nanoparticles were more efficient than the self-preparedα-Fe2O3nanoparticles. At the same time, the photocatalyzer was recyclable by applying an appropriate magnetic field.

scholarly journals The Multifunctionally Graded System for a Controlled Size Effect on Iron Oxide–Gold Based Core-Shell Nanoparticles

Nanomaterials ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 1695
Author(s):  
Bo-Wei Du ◽  
Chih-Yuan Chu ◽  
Ching-Chang Lin ◽  
Fu-Hsiang Ko
Keyword(s):  
Magnetic Field ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Au Nps ◽  
Size Dependent ◽  
Short Period ◽  
Frequency Magnetic Field ◽  
Delivery Platform ◽  
Core Shell Nanoparticles ◽  
Shielding Effects

We report that Fe3O4@Au core-shell nanoparticles (NPs) serve as a multifunctional molecule delivery platform. This platform is also suitable for sensing the doxorubicin (DOX) through DNA hybridization, and the amount of carried DOX molecules was determined by size-dependent Fe3O4@Au NPs. The limits of detection (LODs) for DOX was found to be 1.839 nM. In our approach, an Au nano-shell coating was coupled with a specially designed DNA sequence using thiol bonding. By means of a high-frequency magnetic field (HFMF), a high release percentage of such a molecule could be efficiently achieved in a relatively short period of time. Furthermore, the thickness increase of the Au nano-shell affords Fe3O4@Au NPs with a larger surface area and a smaller temperature increment due to shielding effects from magnetic field. The change of magnetic property may enable the developed Fe3O4@Au-dsDNA/DOX NPs to be used as future nanocarrier material. More importantly, the core-shell NP structures were demonstrated to act as a controllable and efficient factor for molecule delivery.

Magnetic Radio Modifier Based on the Fe3O4/Ta2O5 Nanoparticles

2018 ◽  
Vol 386 ◽  
pp. 156-160
Author(s):  
Ksenya Sergeevna Lukуanenko ◽  
Vladimir Iosifovich Apanasevich ◽  
Leonid Lazarevich Afremov ◽  
Olga Vycheslavovna Tarakova ◽  
Olga Sergeevna Plotnikova ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Radiation Therapy ◽  
Tumor Cells ◽  
Magnetic Core ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
The Core ◽  
Electron Positron ◽  
Nanoparticles Concentration ◽  
Core Shell Nanoparticles

The possibility of application of magnetic core-shell Fe3O4/Ta2O5nanoparticles has been investigated in order to enhance the effect of radiation therapy. It has been shown, that an increase of the concentration of the core-shell nanoparticles due to the influence of the nonuniform magnetic field enhances the absorption of gamma quanta with energy destroying tumor cells (20-200 keV). In addition, an increase of nanoparticles concentration promotes the formation of electron-positron pairs, annihilation of which are leads to an increase in the number of secondary gamma quanta with an energy of 511 keV.

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