Journal Article

PreJuSER-32323

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Carbon species confined inside carbon nanotubes: a density functional study

Liu, Y. ; Jones, G. J.FZJ* ; Zhao, X. ; Ando, Y.

2003
APS College Park, Md.

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Please use a persistent id in citations: http://hdl.handle.net/2128/1360  doi:10.1103/PhysRevB.68.125413

Abstract: Density functional calculations have been performed of the energies, structures, and vibration frequencies of carbon chains, rings, graphitic sheets, bowls, cages, and tubes inside single-walled carbon nanotubes (CNT's) with different diameters. The calculated energies show that carbon chains can be inserted coaxially into 0.7 nm nanotubes, and nanotubes with diameters larger than 1.0 nm can also accommodate other structures. Small carbon species without dangling bonds do not touch the CNT walls, but those with dangling bonds can react with wall atoms, leading to structures with mixed hybridization (sp, sp(2), and sp(3)). Carbon chains and rings have stretching modes between 1800 and 2160 cm(-1), and chain modes are softened when inserted into CNT's. Normal modes of graphitic sheets and cages lie below 1645 cm(-1). The calculations suggest the existence of carbon nanowires, and nanopeapods C-20@CNT should form if the CNT diameter is more than 1 nm. The smallest CNT (2,2) [diameter 0.3 nm] should be stable as the innermost tube of multiwalled nanotubes.

Keyword(s): J

Note: Record converted from VDB: 12.11.2012

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Contributing Institute(s):

1. Theorie I (IFF-TH-I)

Research Program(s):

1. Kondensierte Materie (M02)

Appears in the scientific report 2003
Notes: This version is available at the following Publisher URL: http://prb.aps.org

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