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Annealing-induced structural changes of carbon onions: High-resolution transmission electron microscopy and Raman studies

Bogdanov, Kirill ; Fedorov, Anatoly ; Osipov, Vladimir ; Enoki, Toshiaki ; Takai, Kazuyuki ; Hayashi, Takuya ; Ermakov, Victor ; Moshkalev, Stanislav ; Baranov, Alexander

Carbon (New York), 2014-07, Vol.73, p.78-86 [Periódico revisado por pares]

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Título:
Annealing-induced structural changes of carbon onions: High-resolution transmission electron microscopy and Raman studies
Autor: Bogdanov, Kirill ; Fedorov, Anatoly ; Osipov, Vladimir ; Enoki, Toshiaki ; Takai, Kazuyuki ; Hayashi, Takuya ; Ermakov, Victor ; Moshkalev, Stanislav ; Baranov, Alexander
Assuntos: Annealing ; Carbon ; Crystal defects ; Diamonds ; Electron microscopy ; Grain size ; Nanoparticles ; Nanostructure
É parte de: Carbon (New York), 2014-07, Vol.73, p.78-86
Notas: ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
Descrição: 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.
Editor: Kidlington: Elsevier Ltd
Idioma: Inglês;Russo

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