par Dubois, Marc Alexandre;Guérin, Katia;Petit, Elodie;Batisse, Nicolas;Hamwi, André;Komatsu, Naoki;Giraudet, Jérôme 
;Pirotte, Pascal ;Masin, Francis
Référence The Journal of Physical Chemistry Part C: Nanomaterials and Interfaces, 113, 24, page (10371-10378)
Publication Publié, 2009-06
;Pirotte, Pascal ;Masin, Francis Référence The Journal of Physical Chemistry Part C: Nanomaterials and Interfaces, 113, 24, page (10371-10378)
Publication Publié, 2009-06
Article révisé par les pairs
| Résumé : | 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. © 2009 American Chemical Society. |
