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Phys. Rev. B 77, 153402 (2008) [4 pages]

Fine tuning the charge transfer in carbon nanotubes via the interconversion of encapsulated molecules

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H. Shiozawa1,*, T. Pichler1,†, C. Kramberger1, A. Grüneis1, M. Knupfer1, B. Büchner1, V. Zólyomi2,3, J. Koltai3, J. Kürti3, D. Batchelor4, and H. Kataura5
1IFW Dresden, P.O. Box 270116, D-01171 Dresden, Germany
2Research Institute for Solid State Physics and Optics of the Hungarian Academy of Sciences, P.O. Box 49, H-1525, Budapest, Hungary
3Department of Biological Physics, Eötvös University, Pázmány Péter sétány 1/A, H-1117 Budapest, Hungary
4Universität Würzburg, BESSY II, D-12489 Berlin, Germany
5Nanotechnology Research Institute, AIST, Tsukuba 305-8562, Japan

Received 15 December 2007; published 2 April 2008

Tweaking the properties of carbon nanotubes is a prerequisite for their practical applications. Here, we demonstrate fine tuning the electronic properties of single-wall carbon nanotubes via filling with ferrocene molecules. The evolution of the bonding and charge transfer within the tube is demonstrated via chemical reaction of the ferrocene filler ending up as secondary inner tube. The charge transfer nature is interpreted well within density functional theory. This work gives a direct observation of a fine-tuned continuous amphoteric doping of single-wall carbon nanotubes.

© 2008 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevB.77.153402
DOI:
10.1103/PhysRevB.77.153402
PACS:
73.22.−f, 71.15.Mb, 78.70.Dm, 79.60.−i

*Corresponding author. Present address: Advanced Technology Institute, University of Surrey, Guildford GU2 7XH, United Kingdom.

†Present address: Institut für Materialphysik, Universität Wien Strudlhofgasse 4, 1090 Wien, Austria.

 
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