XPS characterization of nitrogen-doped carbon nanotubes

• Published in: Physica status solidi. A, Applications and materials science Vol. 203; no. 6; pp. 1069 - 1075
• Main Authors: Morant, C., Andrey, J., Prieto, P., Mendiola, D., Sanz, J. M., Elizalde, E.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Berlin WILEY-VCH Verlag 01-05-2006; WILEY‐VCH Verlag; Wiley-VCH
• Subjects: 61.46.Fg; 62.25.+g; 68.37.Ps; 82.80.Pv; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Condensed matter: structure, mechanical and thermal properties; Electron and ion emission by liquids and solids; impact phenomena; Electronic structure and electrical properties of surfaces, interfaces, thin films and low-dimensional structures; Electronic structure of nanoscale materials : clusters, nanoparticles, nanotubes, and nanocrystals; Exact sciences and technology; Interfaces, heterostructures, nanostructures; Mechanical and acoustical properties of condensed matter; Mechanical properties of nanoscale materials; Photoemission and photoelectron spectra; Physics; Atomic force microscopy; Doping; Nanoindentation; Carbon nanotubes; Mechanical properties; Hybridization; Hardness; Core levels; Deconvolution; Chemical bonds; Nitrogen additions; Microstructure; X-ray photoelectron spectra
• ISSN: 1862-6300; 1862-6319
• DOI: 10.1002/pssa.200566110

In this work, CNTs have been bombarded with low energy N ions. X‐ray photoelectron spectroscopy have been used to determine the binding configuration of the N‐doped CNTs. AFM was also used to determine their morphology and mechanical properties. The same morphology is maintained after the N2+ bombardment. XPS analysis shows that the N 1s core level spectra for N‐doped CNTs can be deconvoluted in terms of two peaks related to sp2 (C–N=C) and sp3 hybridization (C–N configuration). This interpretation is in concordance with the increase of the hardness observed by AFM nanoindentations when the sp3 contributions increase. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)