Facile Fabrication of Ultrafine Copper Nanoparticles in Organic Solvent
1 Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials and Department of Chemistry, Fudan University, Shanghai, 200433, China
2 Tech Univ Chemnitz, Fak Nat Wissensch, Inst Chem, Lehrstuhl Anorgan Chem, 09111, Chemnitz, Germany
3 The State Key Lab of ASIC & System and Department of Microelectronic, Fudan University, Shanghai, 200433, China
Nanoscale Research Letters 2009, 4:705-708 doi:10.1007/s11671-009-9301-2Published: 10 April 2009
A facile chemical reduction method has been developed to fabricate ultrafine copper nanoparticles whose sizes can be controlled down to ca. 1 nm by using poly(N-vinylpyrrolidone) (PVP) as the stabilizer and sodium borohyrdride as the reducing agent in an alkaline ethylene glycol (EG) solvent. Transmission electron microscopy (TEM) results and UV–vis absorption spectra demonstrated that the as-prepared particles were well monodispersed, mostly composed of pure metallic Cu nanocrystals and extremely stable over extended period of simply sealed storage.