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Ferrocene encapsulation in carbon nanotubes: Various methods of filling and investigation
Author(s) -
Kocsis Dorina,
Kaptás Dénes,
Botos Ákos,
Pekker Áron,
Kamarás Katalin
Publication year - 2011
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.201100160
Subject(s) - ferrocene , carbon nanotube , raman spectroscopy , materials science , annealing (glass) , molecule , chemical engineering , metallocene , raman scattering , analytical chemistry (journal) , nanotechnology , polymerization , electrode , organic chemistry , electrochemistry , chemistry , composite material , optics , physics , engineering , polymer
One of the most exciting properties of carbon nanotubes is their ability to encapsulate molecular species in their quasi‐one dimensional channels. We present results on single‐walled carbon nanotubes filled with ferrocene, the most stable and commercially available metallocene. For encapsulation of the ferrocene molecules we attempted two types of filling: a high temperature vapor‐phase method and nano‐extraction from ethanol. To confirm the encapsulation, double‐walled carbon nanotubes were created from the samples by annealing. The inner tubes could be detected by Raman scattering via their radial breathing mode. These experiments confirmed that only the high‐temperature annealing method was successful. The product was characterized by infrared attenuated total reflection (IR‐ATR), Raman, ultraviolet–visible (UV–VIS) and Mössbauer spectroscopy. By the latter method other iron‐containing phases were observed. Mössbauer spectra proved that no charge transfer occurs between the nanotube and the ferrocene molecules.