AVS 49th International Symposium
    Nanotubes: Science and Applications Topical Conference Monday Sessions
       Session NT-MoM

Paper NT-MoM10
Nitrogenated Carbon Nanostructures Grown by Microwave Induced Hot-filament CVD Techniques

Monday, November 4, 2002, 11:20 am, Room C-209

Session: Nanotubes: Growth and Characterization
Presenter: D. Sarangi, FSB-IPMC, EPFL, Switzerland
Authors: D. Sarangi, FSB-IPMC, EPFL, Switzerland
A. Karimi, FSB-IPMC, EPFL, Switzerland
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Nitrogenated carbon nanotubes and nanostructures were grown by microwave induced hot-filament chemical vapor deposition (CVD) technique. The mixture of methane or acetylene gas with ammonia or nitrogen gas was used as feed gas. The nanostructures were gro wn on silicon substrates using iron (Fe) and nickel (Ni) as catalysts. The morphological properties of the nanotubes and nanostructures were studied using scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The effect of microw a ve power and the influences of precursor gases on the structures of nanotubes were discussed. About 5 atomic percentage of nitrogen was observed as measured by electron energy loss spectroscopy (EELS). High-resolution TEM observation revealed that, wit h the increase of nitrogen concentration the outer graphane shell of the nanotube becomes more rough, retaining the crystallinity. In general, this paper will discuss the morphological properties of the carbon nanostructures with respect to the mechanical properties.