Gai, P.L., Stephan, O., McGuire, K. et al. (3 more authors) (2004) Structural systematics in boron-doped single wall carbon nanotubes. Journal of Materials Chemistry, 14 (4). pp. 669-675. ISSN 0959-9428
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.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Dates: |
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Institution: | The University of York |
Academic Units: | The University of York > Faculty of Sciences (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 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:6729 |