Curvature effect in ultra-small single-walled carbon nanotubes
| Autor: | Zikang Tang, Irene L. Li |
|---|---|
| Rok vydání: | 2004 |
| Předmět: |
Materials science
General Physics and Astronomy Nanotechnology Surfaces and Interfaces General Chemistry Carbon nanotube Condensed Matter Physics Curvature Molecular sieve Molecular physics Spectral line Surfaces Coatings and Films law.invention Matrix (chemical analysis) Condensed Matter::Materials Science symbols.namesake law symbols Raman spectroscopy Zeolite Softening |
| Zdroj: | Applied Surface Science. 226:72-77 |
| ISSN: | 0169-4332 |
| DOI: | 10.1016/j.apsusc.2003.11.033 |
| Popis: | Ultra-small single-walled carbon nanotubes (SWNTs) were synthesized in the matrix of AlPO4-5 zeolite single crystals. Polarized and temperature-dependent micro-Raman spectra were investigated for this complex. Three dominant peaks were exhibited in the spectra, which could be related to the possible three structures of 0.4 nm SWNTs: the (5,0), (4,2), and (3,3). Due to the large curvature in such SWNTs, the σ and π unoccupied orbital have a mixing. This orbital rehybridization induced obvious softening in the radial breathing modes and smaller temperature-dependence of Raman active modes compared with tubes with larger diameters. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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