Raman investigation of singlewalled carbon nanotubes
Singlewalled carbon nanotubes (SWNT's) prepared by the electric arc method are characterized by means of spectroscopic techniques, mainly Transmission Electron Microscopy and resonance Raman scattering. TEM observations reveal the existence of nïckel particles embedded in an amorphous carbon ma...
| Autores: | , , , , , , , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión aceptada para publicación |
| Fecha de publicación: | 1998 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/255037 |
| Acceso en línea: | http://hdl.handle.net/10261/255037 |
| Access Level: | acceso abierto |
| Palabra clave: | Carbon compounds Raman scattering Nanotubes High resolution transmission electron microscopy |
| Sumario: | Singlewalled carbon nanotubes (SWNT's) prepared by the electric arc method are characterized by means of spectroscopic techniques, mainly Transmission Electron Microscopy and resonance Raman scattering. TEM observations reveal the existence of nïckel particles embedded in an amorphous carbon matrix, but also a large concentration of SWNT's, whose average diameter can be estimated to be near 1.3 nm, arranged in bundles. Raman spectra recorded on the same samples exhibit several features, mainly consisting of two groups. On one hand, in the high frequency region, several bands are observed in the range 1500 - 1600 cm−1, corresponding to a splitting of the E2g2 vibrational mode of graphite. On the other hand, several components are recorded between 150 and 240 cm−1, reflecting a distribution in the diameter of the SWNT's. A systematic study of the ≪collaret≫, from which samples are extracted, is also presented. |
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