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

• Published in: Nano letters Vol. 14; no. 5; pp. 2778 - 2782
• Main Authors: Yu, Yongsheng, Yang, Weiwei, Sun, Xiaolian, Zhu, Wenlei, Li, X.-Z, Sellmyer, D. J, Sun, Shouheng
• Format: Journal Article
• Language: English
• Published: Washington, DC American Chemical Society 14-05-2014
• Subjects: Catalysis; Cobalt; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Cross-disciplinary physics: materials science; rheology; Exact sciences and technology; Iron; Magnetic properties; Magnetic properties and materials; Magnetic properties of nanostructures; Materials science; Nanocrystalline materials; Nanoparticles; Nanoscale materials and structures: fabrication and characterization; Nanostructure; Nickel; Physics; Reduction; Nanoparticles; oleylamine reduction; catalysis; alloy structure; MPt alloy; nanomagnetism; Surface properties; Surfactants; Nanostructured materials; Physical properties; Magnetic properties
• ISSN: 1530-6984; 1530-6992
• DOI: 10.1021/nl500776e

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.