Magnetic properties of cobalt and cobalt-platinum alloy nanoparticles synthesized via microemulsion technique

2001 ◽  
Vol 37 (4) ◽  
pp. 2216-2218 ◽  
Author(s):  
A. Kumbhar ◽  
L. Spinu ◽  
F. Agnoli ◽  
K.-Y. Wang ◽  
W. Zhou ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Alloy Nanoparticles ◽  
Platinum Alloy

Synthesis and Magnetic Properties of Nanocrystalline Co-Ni Alloys: A Review

2012 ◽  
Vol 736 ◽  
pp. 229-240 ◽  
Author(s):  
Sudhakar Panday ◽  
P. Jeevanandam ◽  
B.S. Sunder Daniel
Keyword(s):  
Magnetic Properties ◽  
Binary Alloys ◽  
Synthesis Method ◽  
Surface Oxidation ◽  
Alloy Nanoparticles ◽  
Ni Alloys ◽  
Alloy Particles ◽  
Ni Alloy ◽  
Co Concentration ◽  
Potential Applications

This review article deals with the synthesis, characterization and magnetic properties of Co-Ni nanoalloys. The various physical and chemical methods for the synthesis of Co-Ni alloy nanoparticles are discussed. Co-Ni alloy nanoparticles with different size and shape such as spherical, rods, wires chain-like assembly are found to depend on the synthesis method and experimental condition. The structure of Co-Ni alloys is eitherfcc,hcpor mixedfccandhcpphase and found to depends on size, shape and concentration of Co in the Co-Ni alloys. Sodium hydroxide (NaOH) concentration and Co to Ni ratio influence the shape of bimetallic Co-Ni nanoparticles. Pt nucleating agents produced smaller size of Co-Ni alloy particles compared to Ru and Ag. Higher Co concentration in the Co-Ni alloys also influences the size alloy particles. The magnetic properties of Co-Ni nanoalloys depend on the size, shape and composition of the binary alloys. Surface oxidation of Co-Ni alloy nanoparticles decrease the saturation magnetization and increases with Co concentration in the alloys. The shape of Co-Ni alloy nanoparticles has an influence on coercivity. The microwave absorption properties of the Co-Ni alloys found to depend on the shape, size and composition of the binary alloys. The absorbance peaks shifts to higher frequency with decrease in size of the alloy particles. Potential applications of Co-Ni alloys in various fields are highlighted.

Direct Synthesis of Intermetallic Platinum–Alloy Nanoparticles Highly Loaded on Carbon Supports for Efficient Electrocatalysis

2020 ◽  
Vol 142 (33) ◽  
pp. 14190-14200 ◽  
Author(s):  
Tae Yong Yoo ◽  
Ji Mun Yoo ◽  
Arun Kumar Sinha ◽  
Megalamane S. Bootharaju ◽  
Euiyeon Jung ◽  
...  
Keyword(s):  
Direct Synthesis ◽  
Alloy Nanoparticles ◽  
Carbon Supports ◽  
Platinum Alloy ◽  
Highly Loaded

Fabrication and Magnetic Properties of Mullite Based Nanocomposites with Embedded FeCr Alloy Nanoparticles

2006 ◽  
Vol 510-511 ◽  
pp. 286-289
Author(s):  
Hao Wang ◽  
Wei Min Wang ◽  
Zheng Yi Fu ◽  
Tohru Sekino ◽  
Koichi Niihara
Keyword(s):  
Solid Solution ◽  
Magnetic Properties ◽  
Room Temperature ◽  
Sol Gel ◽  
Xrd Analysis ◽  
Alloy Nanoparticles ◽  
Fecr Alloy ◽  
Acid Washing ◽  
Property Measurement ◽  
Nanocomposite Powders

Mullite-based nanocomposites with embedded FeCr alloy nanoparticles were synthesized by reduction of sol-gel prepared Al5.4(Fe0.8Cr0.2)0.6Si2O13 solid solution in hydrogen. The feature of the formation of FeCr alloy is characterized by XRD analysis. Structural characterization revealed that the intragranular FeCr alloy nanoparticles along with inter-granular iron grains were obtained in as reduced sample. After acid washing, the intergranular metal grains were eliminated. The static magnetic properties of nanocomposite powders were studied using Magnetic Property Measurement System. It is found that part of the intra-granular metal nanoparticles have superparamagnetic behavior at room temperature.

scholarly journals Reversible Attachment of Platinum Alloy Nanoparticles to Nonfunctionalized Carbon Nanotubes

ACS Nano ◽  
2010 ◽  
Vol 4 (4) ◽  
pp. 2438-2444 ◽  
Author(s):  
Beate Ritz ◽  
Hauke Heller ◽  
Anton Myalitsin ◽  
Andreas Kornowski ◽  
Francisco J. Martin-Martinez ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Alloy Nanoparticles ◽  
Platinum Alloy
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