title: Diamond structure cannot be stable in nm-sized particles.
abstract: The observed and calculated densities of nanodiamond cannot be reconciled, and the stability of diamond structure explained, if nanodiamond is regarded as a form of pure carbon. The surface-terminating hydrogen and functional groups are an integral part in the stability of these particles which therefore need not be as inert and non-toxic as bulk diamond, with important implications for nanomedicine.
authors.affiliation: National Research Institute for Physical-Technical Measurements, Mendeleevo, Moscow Region 1415170, Russian Federation.
authors.forename: Stepan S
authors.initials: SS
authors.lastname: Batsanov
keywords: diamond; nanomedicine