An experimental and theoretical study of the optical, electronic, and magnetic properties of novel inverted α-Cr2O3@α-Mn0.35Cr1.65O2.94 core shell nanoparticles

2017 ◽  
Vol 32 (2) ◽  
pp. 269-278 ◽  
Author(s):  
Mohammad D. Hossain ◽  
Robert A. Mayanovic ◽  
Ridwan Sakidja ◽  
Mourad Benamara

Abstract

Nanoscale ◽  
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Vol 13 (8) ◽  
pp. 4519-4529
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J. Elkins ◽  
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Self-assembly of nanoparticles into ordered patterns is a novel approach to build up new consolidated materials with desired collective physical properties.


2018 ◽  
Vol 29 (5) ◽  
pp. 055703 ◽  
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G Singh ◽  
Brigitte H McDonagh ◽  
V Rodionova ◽  
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C.M. Teodorescu ◽  
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D. Macovei ◽  
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2007 ◽  
Vol 7 (1) ◽  
pp. 350-355 ◽  
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Shishou Kang ◽  
Shifan Shi ◽  
G. X. Miao ◽  
Zhiyong Jia ◽  
David E. Nikles ◽  
...  

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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