title: Oxygen hole doping of nanodiamond.
abstract: Surface-graphitized nanodiamonds (NDs) are promising hybrid nanomaterials which appear to combine core properties of diamond with surface properties of graphene-based materials. Here we demonstrate that NDs covered by graphene islands, so-called Fullerene-Like Reconstructions (FLRs), are sensitive to hole doping by molecular oxygen in water. NDs covered by FLRs (NDs-FLRs) are prepared by annealing under vacuum of detonation NDs at 750 °C. We propose that oxygen hole doping is promoted on FLRs due to a unique electronic interaction between the diamond core and the outer graphene layer. As a consequence, NDs-FLRs exhibit positive zeta potential in water, unlike NDs surrounded by several graphitic layers. Surface hole-doped NDs may be promising nanomaterials for new electronic and biomedical applications.
authors.affiliation: CEA, LIST, Diamond Sensors Laboratory, F-91191 Gif-sur-Yvette, France. tristan.petit@cea.fr
authors.forename: Tristan
authors.initials: T
authors.lastname: Petit
authors.forename: Jean-Charles
authors.initials: JC
authors.lastname: Arnault
authors.forename: Hugues A
authors.initials: HA
authors.lastname: Girard
authors.forename: Mohamed
authors.initials: M
authors.lastname: Sennour
authors.forename: Tsai-Yang
authors.initials: TY
authors.lastname: Kang
authors.forename: Chia-Liang
authors.initials: CL
authors.lastname: Cheng
authors.forename: Philippe
authors.initials: P
authors.lastname: Bergonzo