title: Synthesis and size control of monodisperse copper nanoparticles by polyol method.
abstract: We describe herein the synthesis of metallic copper nanoparticles in the presence of poly(vinylpyrrolidone), employed as a protecting agent, via a polyol method in ambient atmosphere. The obtained copper particles were confirmed by XRD to be crystalline copper with a face-centered cubic (fcc) structure. We observed monodisperse spherical copper nanoparticles with a diameter range 45+/-8 nm. The particle size and its distribution are controlled by varying the synthesis parameters such as the reducing agent concentration, reaction temperature, and precursor injection rate. The precursor injection rate plays an important role in controlling the size of the copper nanoparticles. On the basis of XPS and HRTEM results, we demonstrate that the surface of the copper is surrounded by amorphous CuO and that poly(vinylpyrrolidone) is chemisorbed on the copper surface.
authors: Department of Materials Science and Engineering, Yonsei University, Seoul 120-749, South Korea.
authors: Bong Kyun
authors: BK
authors: Park
authors: Sunho
authors: S
authors: Jeong
authors: Dongjo
authors: D
authors: Kim
authors: Jooho
authors: J
authors: Moon
authors: Soonkwon
authors: S
authors: Lim
authors: Jang Sub
authors: JS
authors: Kim