Vibrational Signatures in the Infrared Spectra of Single- and Double-Walled Carbon Nanotubes and Their Diameter Dependence
| Autor: | Katalin Kamarás, Jenö Kürti, Áron Pekker, János Koltai, Á. Rusznyák, Ákos Botos |
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| Rok vydání: | 2011 |
| Předmět: |
Nanotube
Materials science Analytical chemistry Infrared spectroscopy 02 engineering and technology Carbon nanotube 021001 nanoscience & nanotechnology 01 natural sciences Molecular physics Hot band Spectral line law.invention symbols.namesake law Two-dimensional infrared spectroscopy 0103 physical sciences symbols General Materials Science Density functional theory Physical and Theoretical Chemistry 010306 general physics 0210 nano-technology Raman spectroscopy |
| Zdroj: | The Journal of Physical Chemistry Letters. 2:2079-2082 |
| ISSN: | 1948-7185 |
| Popis: | While the vibrational features detected by Raman spectroscopy constitute an essential fingerprint of carbon nanotubes, the same is not true for infrared spectroscopy: studies are few, and agreement is scarce. In this paper, we study wide-range transmission spectra of a series of single-walled nanotube samples, differing in their diameter distribution. In all samples, distinct vibrational features could be detected in the mid-infrared region. We found a correlation between the frequency of the S11 electronic transitions and the 860 cm–1 vibrational band, leading to the conclusion that this vibrational mode hardens with increasing nanotube diameter. Our results are in accordance with density functional theory calculations. The vibrational features in double-walled nanotubes correspond to those of the isolated single-walled tubes of similar size. |
| Databáze: | OpenAIRE |
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