Reference : Formation and electronic properties of BC3 single-wall nanotubes upon boron substitut...
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Physics
http://hdl.handle.net/10993/17587
Formation and electronic properties of BC3 single-wall nanotubes upon boron substitution of carbon nanotubes
English
Fuentes, G. G. [Leibnitz-Institute für Festkörper- und Werkstoffforschung Dresden]
Borowiak-Palen, E. [Leibnitz-Institute für Festkörper- und Werkstoffforschung Dresden]
Knupfer, M. [Leibnitz-Institute für Festkörper- und Werkstoffforschung Dresden]
Pichler, T. [Leibnitz-Institute für Festkörper- und Werkstoffforschung Dresden]
Fink, J. [> >]
Wirtz, Ludger mailto [Department of Material Physics, University of the Basque Country, Centro Mixto CSIC-UPV, and Donostia International Physics Center]
Rubio, A. [Department of Material Physics, University of the Basque Country, Centro Mixto CSIC-UPV, and Donostia International Physics Center]
2004
Physical Review B
69
24
Yes (verified by ORBilu)
International
1098-0121
[en] We report a detailed experimental and theoretical study on the electronic and optical properties of highly boron-substituted (up to 15 at.%) single-wall carbon nanotubes. Core-level electron energy-loss spectroscopy reveals that the boron incorporates into the lattice structure of the tubes, transferring similar to1/2 hole per boron atom into the carbon derived unoccupied density of states. The charge transfer and the calculated Fermi-energy shift in the doped nanotubes evidence that a simple rigid-band model can be ruled out and that additional effects such as charge localization and doping induced band-structure changes play an important role at this high doping levels. In optical absorption a new peak appears at 0.4 eV which is independent of the doping level. Compared to the results from a series of ab initio calculations our results support the selective doping of semiconducting nanotubes and the formation of BC3 nanotubes instead of a homogeneous random boron substitution.
http://hdl.handle.net/10993/17587
10.1103/PhysRevB.69.245403

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