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Fullerene derivatives encapsulated in carbon nanotubes
Author(s) -
Plank W.,
Kuzmany H.,
Simon F.,
Saito T.,
Ohshima S.,
Yumura M.,
Iijima S.,
Rotas G.,
Pagona G.,
Tagmatarchis N.
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.200676129
Subject(s) - raman spectroscopy , carbon nanotube , fullerene , materials science , chemical engineering , nanotube , nanotechnology , derivative (finance) , chemistry , organic chemistry , optics , engineering , physics , financial economics , economics
We report on the preparation and subsequent Raman analysis of carbon nanotube peapods, using the fullerene C 60 and its heterofullerene derivative (C 59 N) 2 as filling materials. The filling with (C 59 N) 2 was done from liquid solution at room temperature and from the gas phase at elevated temperatures. The success of the encapsulation procedure is confirmed through the identification of fingerprint Raman modes and the conversion to double wall nanotubes through heating to 1250 °C. The 2D mode of double wall nanotubes made from (C 59 N) 2 peapods is observed to be downshifted compared to the same mode in double wall nanotubes made from C 60 peapods. We interpret this downshift as an evidence for the integration of the nitrogen into the lattice of the inner tube. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)