Synthesis and characterization of Co@Ag core-shell nanoparticles

被引：34

作者：

Garcia-Torres, Jose ^{[1
]}

Valles, Elisa ^{[1
]}

Gomez, Elvira ^{[1
]}

机构：

[1] Univ Barcelona, Dept Quim Fis, Inst Nanociencia & Nanotecnol, Electrodep, E-08028 Barcelona, Spain

来源：

JOURNAL OF NANOPARTICLE RESEARCH | 2010年 / 12卷 / 06期

关键词：

Co@Ag nanoparticles; Microemulsion method; Structure; Optical properties; Cyclic voltammetry; Composite nanomaterials; MAGNETITE NANOPARTICLES; COBALT OXIDES; SILVER; DEPOSITION;

D O I：

10.1007/s11051-009-9784-x

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A micellar method has been used to prepare silver-coated cobalt (Co@Ag) nanoparticles. The synthesized particles have been deeply characterized by several methods, i.e., XRD, UV-Vis, TEM, XPS, and electrochemical techniques. There is every indication that the obtained particles show a truly core-shell structure. All the nanoparticles obtained under different conditions are in the size range 3-5 nm. High-resolution TEM (HRTEM), Fast Fourier Transformation (FFT), and Selected Area Electron Diffraction (SAED) indicated that the presence of hcp-Co and fcc-Ag, in which cobalt is located in the central area; meanwhile silver is at the edges of the nanoparticle. The absorption band of the Co@Ag colloid shifts to a longer wavelength and broadens relative to that of pure silver colloid. Voltammetric characterization allowed to determine the coverage of the cobalt core.

引用

页码：2189 / 2199

页数：11

共 28 条

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