title: Spectroscopic characterization of N-doped single-walled carbon nanotube strands: an X-ray photoelectron spectroscopy and Raman study.
abstract: We have studied in detail the carbon and nitrogen bonding environments in nitrogen-doped single-walled carbon nanotubes (SWCNTs). The samples consisting of long strands of N-doped SWCNTs were synthesized using an aerosol assisted chemical vapor deposition method involving benzylamine-ethanol-ferrocene solutions. The studied samples were produced using different benzylamine concentrations in the solutions, and exhibited a maximum concentration of ca. 0.3%at of N, determined by X-ray photoelectron spectroscopy (XPS). In general, we observed that the ratio between substitutional nitrogen and the pyridine-like bonded nitrogen varied upon the precursor composition. Moreover, we have observed that the sp2-like substitutional configuration of the C-N bond does not exceed the 50% of the total N atomic incorporation. In addition, we have characterized all these samples using Raman spectroscopy and electron microscopy.
authors.affiliation: Laboratory for Nanoscience and Nanotechnology Research (LINAN) and Advanced Materials Department, IPICyT, Camino a la Presa San José 2055, Col. Lomas 4a. sección, San Luis Potosí 78216, SLP, México.
authors.forename: A L
authors.initials: AL
authors.lastname: Elías
authors.forename: P
authors.initials: P
authors.lastname: Ayala
authors.forename: A
authors.initials: A
authors.lastname: Zamudio
authors.forename: M
authors.initials: M
authors.lastname: Grobosch
authors.forename: E
authors.initials: E
authors.lastname: Cruz-Silva
authors.forename: J M
authors.initials: JM
authors.lastname: Romo-Herrera
authors.forename: J
authors.initials: J
authors.lastname: Campos-Delgado
authors.forename: H
authors.initials: H
authors.lastname: Terrones
authors.forename: T
authors.initials: T
authors.lastname: Pichler
authors.forename: M
authors.initials: M
authors.lastname: Terrones