Polymeric nanocomposite films from functionalized vs suspended single-walled carbon nanotubes
| Autor: | Pankaj Pathak, Wei Wang, John W. Connell, Kent A. Watson, L. Monica Veca, Yi Lin, Ya-Ping Sun, Liangwei Qu, Darron E. Hill, Mohammed J. Meziani, Lawrence F. Allard, Bing Zhou, Julian A Diaz |
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| Rok vydání: | 2006 |
| Předmět: |
Nanotube
Materials science Photoluminescence Nanocomposite Polymers and Plastics Organic Chemistry Selective chemistry of single-walled nanotubes Physics::Optics Carbon nanotube Condensed Matter::Mesoscopic Systems and Quantum Hall Effect law.invention Optical properties of carbon nanotubes Condensed Matter::Materials Science symbols.namesake Chemical engineering law Materials Chemistry symbols Surface modification Composite material Raman spectroscopy |
| Zdroj: | Polymer. 47:5323-5329 |
| ISSN: | 0032-3861 |
| Popis: | The reported work was to demonstrate that the defect-derived photoluminescence in functionalized single-walled carbon nanotubes could be exploited in probing the dispersion of these nanotubes in polymeric nanocomposites because the luminescence emissions are sensitive to the degree of nanotube bundling and surface modification. The polyimide–SWNT nanocomposite thin films obtained from nanotubes with and without functionalization were compared. The spectroscopic results suggest that despite a similar visual appearance in the two kinds of films, the nanotube dispersion must be significantly better in the film with functionalized nanotubes, as reflected by the strong photoluminescence. In fact, the nanotubes embedded in polymer matrix that can be readily characterized by Raman spectroscopy are non-luminescent, while those that are difficult for Raman are strongly luminescent. Therefore, Raman and photoluminescence serve as complementary tools in the investigation of nanocomposites concerning the nanotube dispersion-related properties. |
| Databáze: | OpenAIRE |
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