Monodisperse MPt (M = Fe, Co, Ni, Cu, Zn) Nanoparticles Prepared from a Facile Oleylamine Reduction of Metal Salts

Authors

• Yongsheng Yu, Brown University, Harbin Institute of Technology
• Weiwei Yang, Brown University, Harbin Institute of Technology
• Xiaolian Sun, Brown University
• Wenlei Zhu, Brown University
• Xingzhong Li, University of Nebraska-LincolnFollow
• David J. Sellmyer, University of Nebraska-LincolnFollow
• Shouheng Sun, Brown UniversityFollow

Document Type

Article

Date of this Version

2014

Citation

Nano Letters 14 ,2014

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 con-trolled 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.