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Tube–tube interaction in double‐wall carbon nanotubes
Author(s) -
Pfeiffer R.,
Simon F.,
Kuzmany H.,
Popov V. N.,
Zólyomi V.,
Kürti J.
Publication year - 2006
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200669176
Subject(s) - tube (container) , cluster (spacecraft) , carbon nanotube , shell (structure) , materials science , raman spectroscopy , resonance (particle physics) , molecular physics , chemistry , nanotechnology , atomic physics , composite material , physics , optics , computer science , programming language
In a Raman map of double‐wall carbon nanotubes, the radial breathing modes of the inner tubes are grouped into clusters with similar resonance behavior. These clusters are located close to the resonances of SDS wrapped HiPco tubes and can spread over 30 cm –1 . Compared to the HiPco tubes the resonances of the inner tubes are shifted about 50 meV to the red. Each cluster represents one fixed inner tube type in several different outer tube types and each component of a cluster originates from a well defined inner/outer tube pair. Elaborate inter‐shell interaction models showed an increasing charge transfer from the outer to inner tube with decreasing diameter difference. Additionally, many DWCNTs systems seem to be metallic, i.e. they have a finite density of states at the Fermi level. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)