Solid state NMR study of nanodiamond surface chemistry

Marc Dubois; Katia Guérin; Nicolas Batisse; Elodie Petit; André Hamwi; Naoki Komatsu; Hayat Kharbache; Pascal Pirotte; Francis Masin

doi:10.1016/j.ssnmr.2011.10.003

Solid state NMR study of nanodiamond surface chemistry

Solid State Nucl Magn Reson. 2011 Nov;40(4):144-54. doi: 10.1016/j.ssnmr.2011.10.003. Epub 2011 Nov 18.

Authors

Marc Dubois¹, Katia Guérin, Nicolas Batisse, Elodie Petit, André Hamwi, Naoki Komatsu, Hayat Kharbache, Pascal Pirotte, Francis Masin

Affiliation

¹ Clermont Université, UBP, Laboratoire des Matériaux Inorganiques (UMR CNRS 6002), 24, Avenue des Landais, 63177 Aubière, France. marc.dubois@univ-bpclermont.fr

PMID: 22119523
DOI: 10.1016/j.ssnmr.2011.10.003

Abstract

Solid state NMR measurements using 13C, 1H and 19F nuclei (MAS, CP-MAS) underline the surface chemistry of nanodiamonds from different synthesis (detonation, high pressure high temperature and shock compression). The comparison of the spin-lattice relaxation times T1 and physicochemical characterization (spin densities of dangling bonds, specific surface area and Raman and infrared spectroscopies) for the various samples, as synthesized, chemically purified and fluorinated allows the nature and the location of the various groups, mainly C-OH, C-H and C-F to be investigated. C-OH groups are located only on the surface whereas C-H and dangling bonds seem to be distributed in the whole volume. Fluorination was studied as a chemical treatment for purification and change of the hydrophobicity through the conversion of the C-OH groups into covalent C-F bonds.