Annealing-induced structural changes of carbon onions: High-resolution transmission electron microscopy and Raman studies
The first- and second-order Raman spectra of carbon nano-onions (CNOs), produced via annealing of detonation nanodiamonds with a mean grain size of ∼5nm in the argon ambience at the maximal temperature of annealing process (TMAX) varying from 1500 to 2150°C, are analyzed together with the high-resol...
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| Veröffentlicht in: | Carbon (New York) 2014-07, Vol.73, p.78-86 |
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| container_title | Carbon (New York) |
| container_volume | 73 |
| creator | Bogdanov, Kirill Fedorov, Anatoly Osipov, Vladimir Enoki, Toshiaki Takai, Kazuyuki Hayashi, Takuya Ermakov, Victor Moshkalev, Stanislav Baranov, Alexander |
| description | The first- and second-order Raman spectra of carbon nano-onions (CNOs), produced via annealing of detonation nanodiamonds with a mean grain size of ∼5nm in the argon ambience at the maximal temperature of annealing process (TMAX) varying from 1500 to 2150°C, are analyzed together with the high-resolution transmission electron microscopy (HRTEM) images. The combined analysis provides a deep insight into the annealing-induced atomic-scale structural modifications of the CNO nanoparticles. The Raman and HRTEM data unambiguously demonstrate the reduction in the number of defects in the CNO structure, as well as indicate the conversion from the diamond sp3-bonded carbon phase to the sp2-bonded carbon phase with increasing TMAX and its almost full completion for TMAX=1600°C. |
| doi_str_mv | 10.1016/j.carbon.2014.02.041 |
| format | Article |
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The combined analysis provides a deep insight into the annealing-induced atomic-scale structural modifications of the CNO nanoparticles. 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The combined analysis provides a deep insight into the annealing-induced atomic-scale structural modifications of the CNO nanoparticles. 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The combined analysis provides a deep insight into the annealing-induced atomic-scale structural modifications of the CNO nanoparticles. The Raman and HRTEM data unambiguously demonstrate the reduction in the number of defects in the CNO structure, as well as indicate the conversion from the diamond sp3-bonded carbon phase to the sp2-bonded carbon phase with increasing TMAX and its almost full completion for TMAX=1600°C.</abstract><cop>Kidlington</cop><pub>Elsevier Ltd</pub><doi>10.1016/j.carbon.2014.02.041</doi><tpages>9</tpages><orcidid>https://orcid.org/0000-0001-7518-0841</orcidid></addata></record> |
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| ispartof | Carbon (New York), 2014-07, Vol.73, p.78-86 |
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| language | eng |
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| source | Elsevier ScienceDirect Journals |
| subjects | Annealing Carbon Crystal defects Diamonds Electron microscopy Grain size Nanoparticles Nanostructure |
| title | Annealing-induced structural changes of carbon onions: High-resolution transmission electron microscopy and Raman studies |
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