Screening the Missing Electron: Nanochemistry in Action

H. Shiozawa, T. Pichler, C. Kramberger, M. Rümmeli, D. Batchelor, Z. Liu, K. Suenaga, H. Kataura, and S. R. P. Silva
Phys. Rev. Lett. 102, 046804 – Published 27 January 2009

Abstract

The excitement of nano-test-tube chemistry in a single-walled carbon nanotube is exemplified in our study on electron doping in carbon nanotubes. Electron doping through the 1D van Hove singularity of single-walled carbon nanotubes is realized via a chemical reaction of an encapsulated organocerium compound, CeCp3. The decomposition of CeCp3 inside the carbon nanotubes increases the doping level and greatly enhances the density of conduction electrons. The transition of the cerium encapsulating semiconducting tubes to metallic results in enhanced screening of the photoexcited core hole potential. This fact illustrates the importance of many body effects in understanding core-level excitation process in carbon nanotubes.

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  • Received 14 September 2008

DOI:https://doi.org/10.1103/PhysRevLett.102.046804

©2009 American Physical Society

Authors & Affiliations

H. Shiozawa1, T. Pichler2, C. Kramberger2, M. Rümmeli3, D. Batchelor4, Z. Liu5, K. Suenaga5, H. Kataura6, and S. R. P. Silva1

  • 1Advanced Technology Institute, University of Surrey, Guildford, GU2 7XH, United Kingdom
  • 2Fakultät für Physik, Universität Wien, Strudlhofgasse 4, 1090 Wien, Austria
  • 3IFW Dresden, D-01171 Dresden, Germany
  • 4Universität Würzburg, BESSY II, D-12489 Berlin, Germany
  • 5Research Center for Advanced Carbon Materials, AIST, Tsukuba 305-8565, Japan
  • 6Nanotechnology Research Institute, AIST, Tsukuba 305-8562, Japan

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Issue

Vol. 102, Iss. 4 — 30 January 2009

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