Surface graphitization of ozone-treated detonation nanodiamonds

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 co...

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Bibliographic Details
Published in:Physica status solidi. A, Applications and materials science Applications and materials science, 2014-12, Vol.211 (12), p.2739-2743
Main 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
Format: Article
Language:English
Subjects:
Annealing
Carbon
Detonation
diamond
Engineering Sciences
graphitization
Mass spectroscopy
Materials
Micro and nanotechnologies
Microelectronics
nanocrystals
Nanostructure
Neodymium
ozone
reconstruction
surfaces
Vacuum annealing
Zeta potential
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Summary: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.
ISSN:1862-6300
0031-8965
1862-6319
DOI:10.1002/pssa.201431397