| Abstract
| - Bimetallic nanoparticles such as Fe/Ru and Fe/Pt in the size range 0.5−3 nm were synthesized. These uniform nanoparticles were subsequently used as catalysts for the efficient growth of single-walled carbon nanotubes (SWNTs) on sufaces, with growth efficiency reaching up to over 30%.
- Bimetallic catalysts such as Fe/Ru and Fe/Pt in the size range of 0.5−3 nm are currentlybeing considered for the efficient growth of single-walled carbon nanotubes (SWNTs) on flatsurfaces. It has been shown possible, by using chemical reduction under microwaveirradiation and poly(N-vinyl-2-pyrrolidone) (PVP) as a protective agent, to produce uniformFe/Ru and Fe/Pt bimetallic nanoparticles. Energy-dispersive X-ray analysis (EDAX)confirmed the presence of Fe and Ru or Fe and Pt, and high-resolution transmission electronmicroscopy (HRTEM) showed that they were highly crystalline. The nanoparticles weresubsequently used as catalysts for the surface growth of SWNTs by chemical vapor deposition(CVD). When compared with single-component catalysts such as Fe, Ru, and Pt of similarsize, bimetallic catalysts Fe/Ru and Fe/Pt produced at least 200% more SWNTs, as measuredby atomic force microcopy (AFM). Possible reasons for the high efficiency of bimetalliccatalysts are discussed in this study.
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