Magnetic properties of core–shell nanoparticles possessing a novel Fe(ii)-chromia phase: an experimental and theoretical approach

Nanoscale ◽  
2018 ◽  
Vol 10 (4) ◽  
pp. 2138-2147 ◽  
Author(s):  
Mohammad Delower Hossain ◽  
Robert A. Mayanovic ◽  
Ridwan Sakidja ◽  
Mourad Benamara ◽  
Richard Wirth
Keyword(s):  
Magnetic Properties ◽  
Theoretical Approach ◽  
Room Temperature ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Core Shell Nanoparticles ◽  
Superparamagnetic Properties

Highly ordered bimagnetic core–shell nanoparticles exhibit room-temperature ferrimagnetic and superparamagnetic properties.

Self-Assembled Core-Shell Fe3O4@SiO2 Nanoparticles with High Magnetic Sensitivity from Electrospun Fibers

2014 ◽  
Vol 1033-1034 ◽  
pp. 1068-1071
Author(s):  
Li Qiang Tian ◽  
Pei Pei Zhang
Keyword(s):  
Self Assembly ◽  
Cetyltrimethylammonium Bromide ◽  
Room Temperature ◽  
Electrospinning Process ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Practical Applications ◽  
Magnetic Sensitivity ◽  
Core Shell Nanoparticles ◽  
Superparamagnetic Properties

Nanofibers composed of the hydrophilic polymer polyvinylpyrrolidone K90 (PVP), cetyltrimethylammonium bromide (CTAB), tetraethyl orthosilicate (TEOS) and Fe3O4were fabricated using an electrospinning process. As a result of the templating and confinement properties of the nanfibers, silica coated magnetite (Fe3O4@SiO2) core-shell nanoparticles (NPs) with high magnetic sensitivity were spontaneously formed through molecular self-assembly when the fibers were added to 80% aqueous ethanol (PH=9.0). The typical saturation magnetization of the Fe3O4@SiO2composite particles is up to 43.8 emu/g, with superparamagnetic properties being observed at room temperature. Since the nanoparticles have high magnetic sensitivity and are preparedviaa facile and convenient strategy, they have much promise in a range of practical applications.

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.

From Mn3O4/MnO core–shell nanoparticles to hollow MnO: evolution of magnetic properties

2018 ◽  
Vol 29 (5) ◽  
pp. 055703 ◽  
Author(s):  
A Omelianchik ◽  
G Singh ◽  
Brigitte H McDonagh ◽  
V Rodionova ◽  
D Fiorani ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Core Shell Nanoparticles

The preparation, oxidation resistance and magnetic properties of Co2FeAl@C core-shell nanoparticles

2019 ◽  
Vol 785 ◽  
pp. 553-556
Author(s):  
Fujun Yang ◽  
Degao Liu ◽  
Peng Xiong ◽  
Yunjie Jia ◽  
Wanjun Li ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Oxidation Resistance ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Core Shell Nanoparticles

Structure, morphology and magnetic properties of Fe–Au core-shell nanoparticles

2007 ◽  
Vol 601 (18) ◽  
pp. 4352-4357 ◽  
Author(s):  
O. Pana ◽  
C.M. Teodorescu ◽  
O. Chauvet ◽  
C. Payen ◽  
D. Macovei ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Structure Morphology ◽  
Core Shell Nanoparticles

Synthesis and Magnetic Properties of FePt Nanoparticles with Hard Nonmagnetic Shells

2007 ◽  
Vol 7 (1) ◽  
pp. 350-355 ◽  
Author(s):  
Shishou Kang ◽  
Shifan Shi ◽  
G. X. Miao ◽  
Zhiyong Jia ◽  
David E. Nikles ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Crystallographic Orientation ◽  
Sol Gel ◽  
Molar Ratio ◽  
Core Shell ◽  
Fept Nanoparticles ◽  
Shell Nanoparticles ◽  
Spherical Core ◽  
Size And Morphology ◽  
Core Shell Nanoparticles

Chemically synthesized FePt nanoparticles were coated with nonmagnetic SiO2 and MnO shells by sol–gel and polyol processes. TEM images show that the FePt/SiO2 nanoparticles exhibit a thick spherical shell. The size and morphology of the MnO shell can be controlled by changing the reaction temperature, the molar ratio of surfactants/Mn(acac)2, and/or the concentration of precursor. The morphology of the MnO shell can be either spherical-like or cubic-like, depending on whether the molar ratio of surfactants/Mn(acac)2 is less than or larger than 2. From XRD measurements, the spherical core/shell nanoparticles exhibit 3D random crystallographic orientation, while the cubic core/shell nanoparticles prefer (200) texture. The magnetic moment of FePt particles can be enhanced by coating with SiO2 and MnO shells. Furthermore, the agglomeration of FePt particles upon the thermal annealing can be significantly inhibited with SiO2 and MnO shells.

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