title: Generalized synthesis of metal phosphide nanorods via thermal decomposition of continuously delivered metal-phosphine complexes using a syringe pump.
abstract: We synthesized uniform-sized nanorods of transition metal phosphides from the thermal decomposition of continuously delivered metal-phosphine complexes using a syringe pump. MnP nanorods with dimensions of 8 nm x 16 nm and 6 nm x 22 nm sized were synthesized by the thermal decomposition of Mn-TOP complex, which was prepared from the reaction of Mn(2)(CO)(10) and tri-n-octylphosphine (TOP), using a syringe pump with constant injection rates of 10 and 20 mL/h, respectively. When Co-TOP complex, which was prepared from the reaction of cobalt acetylacetonate and TOP, was reacted in a mixture solvent composed of octyl ether and hexadecylamine at 300 degrees C using a syringe pump, uniform 2.5 nm x 20 nm sized Co(2)P nanorods were generated. When cobaltocene was employed as a precursor, uniform Co(2)P nanorods with 5 nm x 15 nm were obtained. When Fe-TOP complex was added to trioctylphosphine oxide (TOPO) at 360 degrees C using a syringe pump and then allowed to age at 360 degrees C for 30 min, uniform-sized FeP nanorods with an average dimension of 12 nm x 500 nm were produced. Nickel phosphide (Ni(2)P) nanorods with 4 nm x 8 nm were synthesized successfully by thermally decomposing the Ni-TOP complex, which was synthesized by reacting acetylacetonate [Ni(acac)(2)] and TOP. We measured the magnetic properties of these nanorods, and some of the nanorods exhibited different magnetic characteristics compared to the bulk counterparts.
authors.affiliation: National Creative Research Center for Oxide Nanocrystalline Materials and the School of Chemical and Biological Engineering, Seoul National University, Seoul 151-744, Korea.
authors.forename: Jongnam
authors.initials: J
authors.lastname: Park
authors.forename: Bonil
authors.initials: B
authors.lastname: Koo
authors.forename: Ki Youl
authors.initials: KY
authors.lastname: Yoon
authors.forename: Yosun
authors.initials: Y
authors.lastname: Hwang
authors.forename: Misun
authors.initials: M
authors.lastname: Kang
authors.forename: Je-Geun
authors.initials: JG
authors.lastname: Park
authors.forename: Taeghwan
authors.initials: T
authors.lastname: Hyeon