Solid-State NMR Study of Nanodiamonds Produced by the Detonation Technique
| Autor: | Jérôme Giraudet, Naoki Komatsu, Pascal Pirotte, Katia Guérin, Nicolas Batisse, Elodie Petit, André Hamwi, Francis Masin, Marc Dubois |
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| Rok vydání: | 2009 |
| Předmět: |
Chemistry
Carbon-13 NMR satellite Analytical chemistry Fluorine-19 NMR Nuclear magnetic resonance spectroscopy Nuclear magnetic resonance crystallography Carbon-13 NMR Surfaces Coatings and Films Electronic Optical and Magnetic Materials law.invention General Energy Solid-state nuclear magnetic resonance law Magic angle spinning Condensed Matter::Strongly Correlated Electrons Physical and Theoretical Chemistry Electron paramagnetic resonance |
| Zdroj: | The Journal of Physical Chemistry C. 113:10371-10378 |
| ISSN: | 1932-7455 1932-7447 |
| DOI: | 10.1021/jp901274f |
| Popis: | Nanodiamonds obtained by the detonation method have been investigated by means of solid-state magnetic nuclear resonance (NMR) and electron paramagnetic resonance. 13C and 1H magic angle spinning (MAS) NMR and 13C MAS NMR with 1H to 13C cross-polarization allow the determination of surface-hydrogenated groups (CH, CH2, and COH) and the quasi-absence of an sp2 carbon fullerene-like shell on the diamond surface to be underlined. The 1H and 13C spin−lattice relaxation time (T1) and second moment measurements are presented as a function of the temperature. Relaxation is shown to be mainly caused by paramagnetic centers in the case of 13C nuclei, whereas the presence of a molecular motion with an activation energy of 11.15 kJ·mol−1 is involved for 1H nuclei. |
| Databáze: | OpenAIRE |
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