Nano Archive

Synthesis and characterization of Co@Ag core–shell nanoparticles

Garcia-Torres, Jose and Vallés, Elisa and Gómez, Elvira (2010) Synthesis and characterization of Co@Ag core–shell nanoparticles. Journal of Nanoparticle Research, 12 (6). pp. 2189-2199.

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Abstract

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.

Item Type:Article
Uncontrolled Keywords:Co@Ag nanoparticles - Microemulsion method - Structure - Optical properties - Cyclic voltammetry - Composite nanomaterials
Subjects:Material Science > Nanofabrication processes and tools
ID Code:9451
Deposited By:SPI
Deposited On:02 Aug 2010 15:53
Last Modified:02 Aug 2010 15:53

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