Journal
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
Volume 246, Issue 11-12, Pages 2724-2727Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/pssb.200982311
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Funding
- EU [FA513001 (Nanotemp), FWF I83-N20 (ESF IMPRESS)]
- DFG [PI 440j3-2]
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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. (C) 2009 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
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