Synthesis of Monodisperse CoPt3 Nanocrystals and Their Catalytic Behavior for Growth of Boron Nanowires

Monodisperse CoPh nanocrystals （NCs） have been synthesized in oleylamine solution by an organic solvothermal method. The NCs were ellipsoidal particles with a diameter around 6.6 nm and length around 10 nm with a good single crystal structure. Using CoPt3 NCs as catalysts, large-area boron nanowires with diameters ranging from 30 to 50 nm were successfully prepared by chemical vapor deposition using a C/B/B203 mixture as the precursor. Structural analysis indicated that these nanowires were single crystalline with a fl-rhombohedral structure. Measurement of the field emission properties of boron nanowire films showed that the boron nanowires have good field emission characteristics.