title: Surface properties of hydrogenated nanodiamonds: a chemical investigation.
abstract: Hydrogen terminations (C-H) confer to diamond layers specific surface properties such as a negative electron affinity and a superficial conductive layer, opening the way to specific functionalization routes. For example, efficient covalent bonding of diazonium salts or of alkene moieties can be performed on hydrogenated diamond thin films, owing to electronic exchanges at the interface. Here, we report on the chemical reactivity of fully hydrogenated High Pressure High Temperature (HPHT) nanodiamonds (H-NDs) towards such grafting, with respect to the reactivity of as-received NDs. Chemical characterizations such as FTIR, XPS analysis and Zeta potential measurements reveal a clear selectivity of such couplings on H-NDs, suggesting that C-H related surface properties remain dominant even on particles at the nanoscale. These results on hydrogenated NDs open up the route to a broad range of new functionalizations for innovative NDs applications development.
authors.affiliation: CEA LIST, Diamond Sensors Laboratory, 91191 Gif sur Yvette, France. hugues.girard@cea.fr
authors.forename: H A
authors.initials: HA
authors.lastname: Girard
authors.forename: T
authors.initials: T
authors.lastname: Petit
authors.forename: S
authors.initials: S
authors.lastname: Perruchas
authors.forename: T
authors.initials: T
authors.lastname: Gacoin
authors.forename: C
authors.initials: C
authors.lastname: Gesset
authors.forename: J C
authors.initials: JC
authors.lastname: Arnault
authors.forename: P
authors.initials: P
authors.lastname: Bergonzo
mesh_terms: D000475:Alkenes / Q000737:chemistry; D001391:Azo Compounds / Q000737:chemistry; D002244:Carbon / Q000737:chemistry; D006859:Hydrogen / Q000737:chemistry; D006865:Hydrogenation; D058612:Nanodiamonds / Q000737:chemistry*; D056951:Photoelectron Spectroscopy; D011312:Pressure; D017550:Spectroscopy, Fourier Transform Infrared; D013499:Surface Properties; D013696:Temperature
chemical_list: D000475:Alkenes; D001391:Azo Compounds; D058612:Nanodiamonds; D002244:Carbon; D006859:Hydrogen