This paper reports the synthesis of FePt nanoparticle (NPs)/multi walled carbon nanotube (FePt/MWNTs) nanocomposites, have important potential implications to orient CNTs and the development of catalysts. FePt NPs have been synthesized by a chemical method, whose crystallite size is about 2.5-4 nm with a Fe content ranging from 50 to 65. MWNTs produced by chemical vapor deposition have been decorated with FePt nanoparticles under mild conditions without any pretreatment. When the diameter of MWNTs is about 20-30 nm, FePt NPs mostly attach onto the sidewalls of MWNTs. The amount of FePt NPs attached onto the MWNTs can be well controlled. Transmission electron microscope (TEM), high-resolution transmission electron micrograph (HRTEM) studies, and energy, dispersive X-ray spectroscopy (EDS) spectra were performed to observe the nanostructure of these nanocomposites. The orientation in these nanocomposites has been studied initially.

Keywords: FePt nanoparticles; MWNTs; Nanocomposite