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Host–guest interaction between single‐wall carbon nanotubes and encapsulated C 60 probed by resonance Raman spectroscopy
Author(s) -
Joung SoonKil,
Okazaki Toshiya,
Okada Susumu,
Iijima Sumio
Publication year - 2010
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.201000215
Subject(s) - carbon nanotube , van der waals force , raman spectroscopy , intermolecular force , materials science , chemical physics , intermolecular interaction , spectroscopy , nanotechnology , conjugated system , resonance (particle physics) , molecule , chemistry , polymer , atomic physics , optics , organic chemistry , composite material , physics , quantum mechanics
Single‐wall carbon nanotubes (SWCNTs) that are encapsulating C 60 [nanopeapods (NPDs)] can be considered one of the best model systems for investigating host–guest interactions in π‐conjugated molecular systems. We thus have investigated the effects of C 60 encapsulation on the radial breathing mode (RBM) frequencies of semiconducting SWCNTs in a wide range of diameters ( d t = ∼1.23 − 1.5 nm). The observed frequency shifts show a characteristic behavior depending on the intermolecular spacing between encapsulated C 60 and the host SWCNTs. The present findings clearly indicate the van der Waals nature of the SWCNT‐C 60 interaction.