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Raman scattering from ferrocene encapsulated in narrow diameter carbon nanotubes
Author(s) -
Plank W.,
Kuzmany H.,
Pfeiffer R.,
Saito T.,
Iijima S.
Publication year - 2009
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.200982311
Subject(s) - ferrocene , raman spectroscopy , carbon nanotube , materials science , raman scattering , molecule , analytical chemistry (journal) , carbon fibers , optical properties of carbon nanotubes , nanotechnology , chemical engineering , nanotube , composite material , chemistry , optics , organic chemistry , electrochemistry , electrode , physics , engineering , composite number
We studied peapods prepared with ferrocene (dicyclopentadienyl iron, Fe(Cp) 2 ) as filling species, which makes CNTs with diameters down to 1.1 nm accessible for filling. Two different single‐wall carbon nanotube (SWCNT) samples with mean diameters of 1.1 nm (HiPco) and 1.6 nm (DIPS) were used. Filling was done from the gas phase at elevated temperatures. Sample analysis was done by multifrequency Raman spectroscopy. The Raman response from the encapsulated molecule could be observed through the wall of the CNTs, confirming the encapsulation of the employed molecular species. We observed a sharp decrease of the radial breathing mode intensity for the peapod samples compared to the unfilled CNTs. Ferrocene peapods were transformed to double wall carbon nanotubes (DWCNTs) in a heat induced growth process.