Preparation and characterization of Pt/Co-core Au-shell magnetic nanoparticles

被引：11
|
作者：
Dai, Jingtao [1 ]
Du, Yukon [1 ]
Yang, Ping [1 ]
机构：
[1] Suzhou Univ, Dept Chem, Suzhou 215123, Peoples R China
来源：
ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE | 2006年 / 632卷 / 06期
关键词：
nanoparticles (Pt/Co); gold shell; core-shell nanoparticles; magnetic properties;
D O I：
10.1002/zaac.200500504
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
Pt/Co-core Au-shell nanoparticles were synthesized via a two-step route using NaBH4 as a reducing agent. The nanoparticles are characterized by UV-vis spectroscopy, transmission electron microscopy (TEM) and powder X-ray diffraction (XRD). The results indicate that the as-synthesized Pt/Co-core Au-shell nanoparticles have a disordered face centered cubic (fcc) structure, whereas the annealed Pt/Co-core Au-shell nanoparticles exhibit an ordered face centered tetragonal (fct) structure. Superconducting quantum interference device (SQUID) studies reveal that the coercivity of the annealed Pt/Co-core Au-shell nanoparticles increases to 510 Oe after heat treatment at 500 degrees C for 2 h.
引用
收藏
页码：1108 / 1111
页数：4
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