Gai, P.L., Stephan, O., McGuire, K., Rao, A.M., Dresselhaus, M.S. and Dresselhaus, G. (2004) Structural systematics in boron-doped single wall carbon nanotubes. Journal of Materials Chemistry, 14 (4). pp. 669-675. ISSN 0959-9428
Full text not available from this repository.Abstract
We report atomic level high resolution transmission electron microscopy (HRTEM), electron nanodiffraction and nano-electron energy loss spectroscopy (nano-EELS) of boron-doped carbon nanostructures obtained by laser ablation of Co/Ni/B-doped carbon targets. The observations provide direct evidence for structural systematics and atomic structural defects as a function of the B content in the target. Targets with low B concentration (below 3 at%), produced ropes of single wall carbon nanotubes (SWCNTs) with no detectable boron present in the SWCNT ropes. However, unintended N-doping of the curved honeycomb lattice was observed in the 2.5 at% B sample (which is attributed to the possible presence of small amounts of N in the targets or reaction environments), with striking consequences for doping of heteroatoms within the hexagonal lattice of the graphene layer. At higher B concentration (3.5 at% and higher), there are significant changes in the nanostructure, which exhibits defective graphite layers and a small number of double wall carbon nanotubes (DWCNTs). At the higher B concentration, boron-doping is evidenced in the form of very small amorphous B clusters trapped in graphite-like defective sites.
| Item Type: | Article |
|---|---|
| Academic Units: | The University of York > Physics (York) |
| Depositing User: | York RAE Import |
| Date Deposited: | 22 Apr 2009 10:34 |
| Last Modified: | 22 Apr 2009 10:34 |
| Published Version: | http://dx.doi.org/10.1039/b311696d |
| Status: | Published |
| Publisher: | Royal Society of Chemistry |
| Identification Number: | 10.1039/b311696d |
| URI: | http://eprints.whiterose.ac.uk/id/eprint/6729 |
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