Surface chemical modifications and surface reactivity of nanodiamonds hydrogenated by CVD plasma

Abstract : The present study focuses on the interaction of hydrogen microwave CVD plasma with nanodiamonds (NDs). Hydrogen treated NDs (H-NDs) were characterized using electron spectroscopies (XPS, AES) without air exposure. A surface temperature higher than 700 °C is needed to remove the oxygen present on raw NDs. The kinetics of oxygen removal were investigated. Moreover, UHV annealings of H-NDs after ageing in ambient air clearly underline that 75% of the oxygen is related to physisorbed species. Finally, H-NDs were efficiently grafted using photochemical reaction with alkenes and a spontaneous coupling of aryldiazonium salts. These results confirm similar electronic surface properties between bulk and nano diamond materials.
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https://hal-mines-paristech.archives-ouvertes.fr/hal-01271867
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Soumis le : mardi 9 février 2016 - 17:03:54
Dernière modification le : vendredi 19 juillet 2019 - 17:14:03

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Jean-Charles Arnault, Tristan Petit, Hugues Girard, Anthony Chavanne, Céline Gesset, et al.. Surface chemical modifications and surface reactivity of nanodiamonds hydrogenated by CVD plasma . Physical Chemistry Chemical Physics, Royal Society of Chemistry, 2011, 13, pp.11481-11487. ⟨10.1039/C1CP20109C ⟩. ⟨hal-01271867⟩

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