科研之友
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摘要
We have developed a novel synthesis of carbon coated Cu@Ag and Ag@Cu core-shell nanoparticles by a rapid, cheap, solvent-less and straightforward method of fabrication. The technique by which these composites are prepared is called RAPET (Reaction under Autogenic Pressure at Elevated Temperatures). The X-ray diffraction measurements confirm the presence of two separated phases - silver and copper - and negate the possibility of alloy formation. Elemental mapping obtained by electron energy-loss spectroscopy (EELS) and line-scan analysis confirm the core-shell structure. Colloidal suspensions of Cu@Ag@C nanostructures were prepared and their stability was examined by dynamic light scattering (DLS) measurements. The mechanism of formation of the multilayer nanostructures is discussed here.
- 出版日期2012
