Raman and XPS analyses of pristine and annealed N-doped double-walled carbon nanotubes

Author(s)

Lei Shi, Markus Sauer, Oleg Domanov, Philip Rohringer, Paola Ayala, Thomas Pichler

Abstract

Nitrogen-doped single/multi-walled carbon nanotubes (CNTs) have been

studied for a long time from synthesis to properties. However, the

stability of N in the CNT lattice still needs further development. In

this work, N-doped double-walled (DW) CNTs were synthesized using

benzylamine as C and N sources. In order to test the stability of

N-doped DWCNTs, high-temperature annealing in vacuum was performed. By

XPS and Raman spectroscopic measurements, we found that the N-doped

DWCNTs are still stable under 1500.

The amounts of pyrrolic and molecular N decrease after the annealing

due to the release effect. However, the amounts of pyridinic and

graphitic N greatly increase. Also, the N ratio of the outer tubes

increases much more than that of the inner tubes, suggesting that N

atoms from the surrounding N-containing materials combine into the CNT

structure during the annealing.

Organisation(s)

Electronic Properties of Materials

Journal

Physica Status Solidi. B: Basic Research

Volume

252

Pages

2558–2563

No. of pages

ISSN

0370-1972

DOI

https://doi.org/10.1002/pssb.201552548

Publication date

11-2015

Peer reviewed

Yes

Austrian Fields of Science 2012

103015 Condensed matter

Keywords

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials, Condensed Matter Physics

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