Chemically Doped Double-Walled Carbon Nanotubes: Cylindrical Molecular Capacitors

Gugang Chen, S. Bandow, E. R. Margine, C. Nisoli, A. N. Kolmogorov, Vincent H. Crespi, R. Gupta, G. U. Sumanasekera, S. Iijima, and P. C. Eklund

Phys. Rev. Lett. 90, 257403 – Published 25 June 2003

Abstract

A double-walled carbon nanotube is used to study the radial charge distribution on the positive inner electrode of a cylindrical molecular capacitor. The outer electrode is a shell of bromine anions. Resonant Raman scattering from phonons on each carbon shell reveals the radial charge distribution. A self-consistent tight-binding model confirms the observed molecular Faraday cage effect, i.e., most of the charge resides on the outer wall, even when this wall was originally semiconducting and the inner wall was metallic.

Received 20 December 2002

DOI:https://doi.org/10.1103/PhysRevLett.90.257403

Authors & Affiliations

Gugang Chen¹, S. Bandow⁴, E. R. Margine¹, C. Nisoli¹, A. N. Kolmogorov¹, Vincent H. Crespi¹, R. Gupta¹, G. U. Sumanasekera³, S. Iijima^4,5, and P. C. Eklund^1,2,*

¹Department of Physics, The Pennsylvania State University, University Park, Pennsylvania 16802, USA
²Department of Materials Science, The Pennsylvania State University, University Park, Pennsylvania 16802, USA
³Department of Physics, University of Louisville, Louisville, Kentucky 40292, USA
⁴Department of Materials Science and Engineering, Meijo University, Nagoya 468-8502, Japan
⁵Japan Science and Technology Corporation , NEC Corporation, Tsukuba 305-8501, Japan

^*Author to whom correspondence should be addressed. Email address: pce3@psu.edu

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Vol. 90, Iss. 25 — 27 June 2003

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