Nitrogen-Silicon Heterodoping of Carbon Nanotubes
Por:
Audiffred M., Elías A.L., Gutiérrez H.R., López-Urías F., Terrones H., Merino G., Terrones. M.
Publicada:
25 abr 2013
Resumen:
Si/O/N-doped single-walled carbon nanotubes (SWNTs) are synthesized using aerosol-assisted chemical vapor deposition (AACVD). The samples are characterized by Raman spectroscopy, high-resolution transmission electron microscopy (HRTEM), electron energy loss spectroscopy (EELS), energy-dispersive X-ray spectroscopy (EDS), Auger electron spectroscopy (AES), and X-ray photoelectron spectroscopy (XPS). HRTEM and Raman spectroscopy studies indicate that doping plays a crucial role in the generation of stable small diameter SWNTs. In order to elucidate the role of the heterodoping (Si/N, O/N, and Si/O) on the electronic properties and stability of SWNTs, density functional theory (DFT) computations on semiconductor (10,0), semimetallic (9,0), and metallic (5,5) SWNTs are performed. It is found that in the heterodoped SWNTs substitutional nitrogen makes the inclusion of Si and O atoms more energetically favorable within the carbon lattice. Heterodoping with Si/O/N may have an important impact
Filiaciones:
Departmento de Química, Universidad de Guanajuato, Noria Alta s/n, Guanajuato, Gto., Mexico
Department of Physics, Pennsylvania State University, 104 Davey Lab, University Park, PA 16802, United States
Departamento de Física Aplicada, Centro de Investigación y de Estudios Avanzados, Unidad Merida, Km. 6 Antigua Carretera a Progreso, Apdo. Postal 73, Cordemex, 97310, Mérida, Yuc., Mexico
Department of Physics and Astronomy, University of Louisville, Louisville, KY 40292, United States
Advanced Materials Department, IPICYT, Camino a la Presa San José 2055, Col. Lomas, San Luis-Potosí S.L.P., 78216, Mexico
Departamento de Física, Universidade Federal do Ceará, P.O. Box 6030, Fortaleza, CEP 60455-900, Brazil
Research Center for Exotic Nanocarbons (JST), Shinshu University, Wakasato 4-17-1, Nagano 380-8553, Japan
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