Author/Authors :
F. Villalpando-Paez، نويسنده , , Raymond F. and Zamudio، نويسنده , , Wisam A. and Elias، نويسنده , , A.L. and Son، نويسنده , , J. H. S. BARROS، نويسنده , , E.B. and Chou، نويسنده , , S.G and Kim، نويسنده , , Y.A. and Muramatsu، نويسنده , , H. and Hayashi، نويسنده , , T. and Kong، نويسنده , , J. and Terrones، نويسنده , , H. and Dresselhaus، نويسنده , , G. and Endo، نويسنده , , Sofia M. and Terrones، نويسنده , , M. and Dresselhaus، نويسنده , , M.S.، نويسنده ,
Abstract :
We describe the synthesis of N-doped single-walled carbon nanotubes (N-SWNTs), that agglomerate in bundles and form long strands (<10 cm), via the thermal decomposition of ferrocene/ethanol/benzylamine (FEB) solutions in an Ar atmosphere at 950 °C. The amount of benzylamine in the solution was varied from 0% to 26% by weight. Using Raman spectroscopy, we noted that as the N content is increased in the starting FEB solution, the growth of large diameter tubes is inhibited. We observed that the relative electrical conductivity of the strands increases with increasing nitrogen concentration. Thermogravimetric analysis (TGA) showed novel features for highly doped tubes that are related to chemical reactions on N sites.
