Can we look into carbon nanotubes by infrared light?
ORAL
Abstract
Individual molecules filled into carbon nanotubes exhibit Raman activity but very weak, if any, infrared absorption. We will present infrared (transmission and ATR), Raman and transmission electron microscopy data of various filled nanotubes (sorted by diameter and metallicity; encapsulating organometallic, aromatic and fullerene-based molecules) to illustrate this puzzling behavior. In the infrared spectra of double-walled carbon nanotubes, however, vibrational signatures of the inner and outer tubes are clearly discernible. A strong proof for this assignment is the shift of the inner-tube modes with $^{13}$C isotope content in samples where the inner tube is enriched with $^{13}$C.
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Authors
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Katalin Kamaras
Research Institute for Solid State Physics and Optics, Hungarian Academy of Sciences, Budapest
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Aron Pekker
Research Institute for Solid State Physics and Optics, Hungarian Academy of Sciences, Budapest
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Zsolt Szekrenyes
Research Institute for Solid State Physics and Optics, Hungarian Academy of Sciences, Budapest
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Ferenc Simon
Budapest University of Technology and Economics, Department of Physics, Budapest University of Technology and Economics, Budafoki \'ut 8, 1111 Budapest, Hungary
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Bea Botka
Walther-Meissner-Institute, Garching
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Rudi Hackl
Walther-Meissner-Institute, Garching
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Akos Botos
University of Nottingham
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Andrei Khlobystov
University of Nottingham