Diamond nanoparticles (nanodiamonds) behave outstanding chemical, electronic, thermal and optical properties. Such nanoparticles are actively investigated for nanomedecine, energy applications, quantum technologies and advanced lubricants and composites. For most applications, a fine control of their core composition and surface chemistry is essential to adjust the requested properties. The group at CEA-NIMBE-LEDNA behaves expertise in growth and surface modifications of nanodiamonds by gas phase treatments using homemade set-ups.
Nanodiamonds from detonation synthesis or obtained by milling of bulk diamond are used. Both sources of nanodiamonds can be exposed to thermal treatments performed in different atmospheres (air, hydrogen, argon, vacuum). Such treatments led to controlled surface chemistry: oxidized with numerous carboxylic groups; reduced either with carbon/hydrogen bonds or sp2 carbon reconstructions.
Three main research topics are currently investigated: