Strong and stable photoluminescence from the semiconducting inner tubes within double walled carbon nanotubes
"We examined the optical features of single wall carbon nanotubes (SWNTs) and the inner tubes within double walled carbon nanotubes (DWNTs) having the same (n,m) chirality. The brighter and more stable photoluminescence signals as well as the larger absorbance were observed for the semiconducti...
| Autores: | , , |
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| Formato: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2009 |
| País: | México |
| Recursos: | Instituto Potosino de Investigación Científica y Tecnológica |
| Repositorio: | Repositorio Institucional del IPICYT |
| Idioma: | inglés |
| OAI Identifier: | oai:ipicyt.repositorioinstitucional.mx:1010/1116 |
| Acesso em linha: | http://ipicyt.repositorioinstitucional.mx/jspui/handle/1010/1116 |
| Access Level: | acceso abierto |
| Palavra-chave: | info:eu-repo/classification/Autor/Carbon nanotubes info:eu-repo/classification/Autor/Chirality info:eu-repo/classification/Autor/Elemental semiconductors info:eu-repo/classification/Autor/Excitons info:eu-repo/classification/Autor/Photoluminescence; info:eu-repo/classification/Autor/Red shift info:eu-repo/classification/Autor/Semiconductor nanotubes info:eu-repo/classification/cti/1 info:eu-repo/classification/cti/22 |
| Resumo: | "We examined the optical features of single wall carbon nanotubes (SWNTs) and the inner tubes within double walled carbon nanotubes (DWNTs) having the same (n,m) chirality. The brighter and more stable photoluminescence signals as well as the larger absorbance were observed for the semiconducting inner tubes within DWNTs and not for SWNTs. The outer layers of DWNTs maintain the high structural integrity of the inner tubes during both oxidative purification and strong sonication steps and are responsible in increasing the dielectric screening (due to weaker Coulomb interaction); thus leading to a redshift of the E(11)(S) and E(22)(S) excitonic transitions." |
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