Design of Core−Shell-Type Nanoparticles Carrying Stable Radicals in the Core

2009 ◽  
Vol 10 (3) ◽  
pp. 596-601 ◽  
Author(s):  
Toru Yoshitomi ◽  
Daisuke Miyamoto ◽  
Yukio Nagasaki
Keyword(s):  
Core Shell ◽  
The Core ◽  
Shell Type ◽  
Stable Radicals

scholarly journals Microstructure and Magnetic Properties of NdFeB Sintered Magnets Diffusion-Treated with Cu/Al Mixed Dyco Alloy-Powder

2017 ◽  
Vol 62 (2) ◽  
pp. 1263-1266 ◽  
Author(s):  
M.-W. Lee ◽  
K.-H. Bae ◽  
S.-R. Lee ◽  
H.-J. Kim ◽  
T.-S. Jang
Keyword(s):  
Grain Boundary ◽  
Diffusion Path ◽  
Boundary Phase ◽  
Core Shell ◽  
Phase Layer ◽  
Sintered Magnets ◽  
The Core ◽  
Shell Type ◽  
Property Changes ◽  
And Diffusion

AbstractWe investigated the microstructural and magnetic property changes of DyCo, Cu + DyCo, and Al + DyCo diffusion-treated NdFeB sintered magnets. The coercivity of all diffusion treated magnet was increased at 880ºC of 1stpost annealing(PA), by 6.1 kOe in Cu and 7.0 kOe in Al mixed DyCo coated magnets, whereas this increment was found to be relatively low (3.9 kOe) in the magnet coated with DyCo only. The diffusivity and diffusion depth of Dy were increased in those magnets which were treated with Cu or Al mixed DyCo, mainly due to comparatively easy diffusion path provided by Cu and Al because of their solubility with Ndrich grain boundary phase. The formation of Cu/Al-rich grain boundary phase might have enhanced the diffusivity of Dy-atoms. Moreover, relatively a large number of Dy atoms reached into the magnet and mostly segregated at the interface of Nd2Fe14B and grain boundary phases covering Nd2Fe14B grains so that the core-shell type structures were developed. The formation of highly anisotropic (Nd, Dy)2Fe14B phase layer, which acted as the shell in the core-shell type structure so as to prevent the reverse domain movement, was the cause of enhancing the coercivity of diffusion treated NdFeB magnets. Segregation of cobalt in Nd-rich TJP followed by the formation of Co-rich phase was beneficial for the coercivity enhancement, resulting in the stabilization of the metastable c-Nd2O3phase.

Microwave absorption properties of the core/shell-type iron and nickel nanoparticles

2008 ◽  
Vol 320 (6) ◽  
pp. 1106-1111 ◽  
Author(s):  
B. Lu ◽  
X.L. Dong ◽  
H. Huang ◽  
X.F. Zhang ◽  
X.G. Zhu ◽  
...  
Keyword(s):  
Microwave Absorption ◽  
Nickel Nanoparticles ◽  
Core Shell ◽  
Absorption Properties ◽  
Microwave Absorption Properties ◽  
The Core ◽  
Shell Type

Novel core-shell type thermo-sensitive nanoparticles composed of poly(γ-benzyl L-glutamate) as the core and poly(N-isopropylacrylamide) as the shell

1997 ◽  
Vol 18 (5) ◽  
pp. 361-369 ◽  
Author(s):  
Chong-Su Cho ◽  
Jae-Bok Cheon ◽  
Young-Il Jeong ◽  
In-Sook Kim ◽  
Sung-Ho Kim ◽  
...  
Keyword(s):  
Core Shell ◽  
The Core ◽  
Shell Type

A Cd(OH)2/CdS heteronanostructure of the core-shell type

2008 ◽  
Vol 419 (1) ◽  
pp. 41-46 ◽  
Author(s):  
A. S. Vorokh ◽  
N. S. Kozhevnikova
Keyword(s):  
Core Shell ◽  
The Core ◽  
Shell Type

Magnetic photocatalysts of the core-shell type

2002 ◽  
Vol 1 (10) ◽  
pp. 742-744 ◽  
Author(s):  
Dmitry G. Shchukin ◽  
Anatoly I. Kulak ◽  
Dmitry V. Sviridov
Keyword(s):  
Core Shell ◽  
The Core ◽  
Shell Type

The core-shell type Co0.24Ba catalyst with high activity for N2O decomposition

2018 ◽  
Vol 460 ◽  
pp. 69-73 ◽  
Author(s):  
Haibiao Yu ◽  
Xinping Wang ◽  
Xingxing Wu
Keyword(s):  
High Activity ◽  
N2o Decomposition ◽  
Core Shell ◽  
The Core ◽  
Shell Type

Formation of nanostructures of the core-shell type upon diffusion phase decomposition of fluorophosphate glasses

2007 ◽  
Vol 33 (6) ◽  
pp. 569-575
Author(s):  
V. G. Melekhin ◽  
E. V. Kolobkova ◽  
A. A. Lipovskii ◽  
V. D. Petrikov ◽  
O. V. Almjasheva
Keyword(s):  
Core Shell ◽  
Phase Decomposition ◽  
The Core ◽  
Shell Type ◽  
Diffusion Phase

Preparation of Asymmetric Thermosensitive Double-layer Gel

2008 ◽  
Vol 1129 ◽  
Author(s):  
Takashi Iizawa ◽  
Akihiro Terao
Keyword(s):  
Acrylic Acid ◽  
Double Layer ◽  
Axial Symmetry ◽  
Core Shell ◽  
Synthetic Method ◽  
Shell Layer ◽  
New Approach ◽  
The Core ◽  
Shell Type ◽  
Acid Gel

AbstractHeterogeneous amidation of poly(acrylic acid) gel-1,8-diazabicyclo-[5,4,0]-7-undecene salt (DAA) in N-methyl-2-pyrrolidone containing an excess of alkylamine and triphenylphosphite occurred from the surface to give the corresponding DAA-poly(N-alkylacrylamide) (PNAA) core-shell type gel, consisting of an unreacted DAA core and a quantitatively amidated shell layer. Further amidation of the DAA-PNAA core-shell type gel with a second alkylamine afforded a novel core-shell type gel consisting of two PNAA layers: PNAA(2) and PNAA(1). The resulting cylindrical PNAA(2)-PNAA(1) core-shell type gels were resistant to marked deformation caused by swelling/de-swelling because of their axial symmetry. This paper proposes a new approach to the preparation of asymmetric thermosensitive PNAA(2)-PNAA(1) double-layer gels by several procedures using the synthetic method of the core-shell type gels containing of poly(N-isopropylacrylamide) and poly(N-n-propylacrylamide) layers. Among the obtained asymmetric double-layer gels the model I type gel (cylindrical grooved PNNPA-PNIPA core-shell type gel) was markedly bent in water at temperatures between the lower critical solution temperatures of both layers.

scholarly journals Comprehensive magnetic resonance characteristics of carbon-encapsulated iron nanoparticles: a new frontier for the core-shell–type contrast agents

2020 ◽  
Vol 22 (4) ◽  
Author(s):  
Ireneusz P. Grudzinski ◽  
Michal Bystrzejewski ◽  
Piotr Bogorodzki ◽  
Andrzej Cieszanowski ◽  
Wojciech Szeszkowski ◽  
...  
Keyword(s):  
Magnetic Resonance ◽  
Contrast Agents ◽  
Iron Nanoparticles ◽  
Core Shell ◽  
The Core ◽  
Shell Type ◽  
New Frontier
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