title: 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.
authors.affiliation: CEA, LIST, Diamond Sensors Laboratory, Gif-sur-Yvette, F91191, France. jean-charles.arnault@cea.fr
authors.forename: Jean-Charles
authors.initials: JC
authors.lastname: Arnault
authors.forename: Tristan
authors.initials: T
authors.lastname: Petit
authors.forename: Hugues
authors.initials: H
authors.lastname: Girard
authors.forename: Anthony
authors.initials: A
authors.lastname: Chavanne
authors.forename: Céline
authors.initials: C
authors.lastname: Gesset
authors.forename: Mohamed
authors.initials: M
authors.lastname: Sennour
authors.forename: Marc
authors.initials: M
authors.lastname: Chaigneau