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Metallic bundles of single‐wall carbon nanotubes probed by electron spin resonance
Author(s) -
Simon F.,
Quintavalle D.,
Jánossy A.,
Náfrádi B.,
Forró L.,
Kuzmany H.,
Hauke F.,
Hirsch A.,
Mende J.,
Mehring M.
Publication year - 2007
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.200776174
Subject(s) - electron paramagnetic resonance , fullerene , carbon nanotube , metal , condensed matter physics , electron , materials science , saturation (graph theory) , lattice (music) , molecular physics , chemistry , crystallography , nanotechnology , nuclear magnetic resonance , physics , mathematics , organic chemistry , quantum mechanics , combinatorics , metallurgy , acoustics
C 59 N magnetic fullerenes inside single‐wall carbon nanotubes (SWCNTs) are used to probe the density of states (DOS) on the host tubes using electron spin resonance (ESR). The C 59 N radicals are separated by C 60 fullerenes to prevent dimerization and C 59 N–C 60 heterodimers are formed at low temperatures. The electron spin–lattice relaxation time, T 1 , of the heterodimers is deduced from the homogeneous ESR line‐width. The analysis is supported by saturation ESR studies. The inverse of the heterodimer T 1 follows a linear behavior in the 20–300 K temperature range, the so‐called Korringa law, evidencing a metallic DOS on all tubes in a bundle. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
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