title: Monodisperse MPt (M = Fe, Co, Ni, Cu, Zn) nanoparticles prepared from a facile oleylamine reduction of metal salts.
abstract: We report a simple, yet general, approach to monodisperse MPt (M = Fe, Co, Ni, Cu, Zn) nanoparticles (NPs) by coreduction of M(acac)2 and Pt(acac)2 (acac = acetylacetonate) with oleylamine at 300 °C. In the current reaction condition, oleylamine serves as the reducing agent, surfactant, and solvent. As an example, we describe in details the synthesis of 9.5 nm CoPt NPs with their compositions controlled from Co37Pt63 to Co69Pt31. These NPs show composition-dependent structural and magnetic properties. The unique oleylamine reduction process makes it possible to prepare MPt NPs with their physical properties and surface chemistry better rationalized for magnetic or catalytic applications.
authors.affiliation: Department of Chemistry, Brown University , Providence, Rhode Island 02912, United States.
authors.forename: Yongsheng
authors.initials: Y
authors.lastname: Yu
authors.forename: Weiwei
authors.initials: W
authors.lastname: Yang
authors.forename: Xiaolian
authors.initials: X
authors.lastname: Sun
authors.forename: Wenlei
authors.initials: W
authors.lastname: Zhu
authors.forename: X-Z
authors.initials: XZ
authors.lastname: Li
authors.forename: D J
authors.initials: DJ
authors.lastname: Sellmyer
authors.forename: Shouheng
authors.initials: S
authors.lastname: Sun