Synthesis of Cu nanoparticles by electron beam irradiation for oxidation stability in ethylene glycol matrix

The oxidation free copper nanoparticles were synthesized by electron beam irradiation in the ethylene glycol matrix without reduction agent. This electron beam irradiation reduction method (EBIRM) was simple and clean process because of unused the reduction agent. The metal precursor solution was prepared as fellow. The CuSO₄·5H₂O and polyvinylpyrrolydone (PVP) were soluted in the ethylene glycol and the 2-propanol was added. The various molecular weight (Mw) of PVP was used as stabilized agent and the 2-propanol was used as radical scanvenger. The reaction mixture was irradiated electron beam in ambient atmosphere. The phases and structures of prepared the copper nanoparticles were characterized by X-ray powder diffraction (XRD) and transmission electron microscopy (TEM). The surface state of prepared copper nanoparticle was examined by X-ray photoelectron (XPS) scan. The oxidation stability of synthesized copper nanoparticle was observed by XRD patterns for 59days. The chemical composition of copper nanoparticle was investigated the energy dispersive spectrometer (EDS) and thermogravimetric analyzer (TGA).