We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Surface graphitization of ozone-treated detonation nanodiamonds.
- Authors
Arnault, Jean‐Charles; Petit, Tristan; Girard, Hugues A.; Gesset, Celine; Combis‐Schlumberger, Mathilde; Sennour, Mohammed; Koscheev, Alex; Khomich, Andrei A.; Vlasov, Igor; Shenderova, Olga
- Abstract
Bifunctional detonation nanodiamonds (NDs) were obtained by vacuum annealing at 750 °C of NDs previously oxidized in ozone (ND-ozone). Raman investigations demonstrate a significantly higher amount of sp2 carbon compared to ND with polyfunctional surface (ND-NRI) annealed in vacuum under the same conditions. In addition to sp2 carbon caps, thermal desorption mass spectroscopy analysis revealed a higher oxygen concentration at the ND-ozone surface with abundant carbonyl and carboxylic acid anhydride groups. The supernatant of ND-ozone annealed in vacuum exhibits a positive zeta potential (+50 mV at pH 6.5), while the starting sample has a high negative zeta potential (−60 mV). This supports the oxygen hole-doping model previously proposed to explain the positive zeta potential of NDs after vacuum annealing.
- Subjects
GRAPHITIZATION; NANODIAMONDS; OZONE; THERMAL desorption; MASS spectrometry
- Publication
Physica Status Solidi. A: Applications & Materials Science, 2014, Vol 211, Issue 12, p2739
- ISSN
1862-6300
- Publication type
Article
- DOI
10.1002/pssa.201431397