title: Electrostatic grafting of diamond nanoparticles: a versatile route to nanocrystalline diamond thin films.
abstract: Nanodiamond (ND) seeding is a well-established route toward the CVD (chemical vapor deposition) synthesis of diamond ultrathin films. This method is based on the deposition onto a substrate of diamond nanoparticles which act as pre-existing sp(3) seeds. Here, we report on a straightforward method to disperse diamond nanoparticles on a substrate by taking advantage of the electrostatic interactions between the nanodiamonds and the substrate surface coated with a cationic polymer. This layer-by-layer deposition technique leads to reproducible and homogeneous large-scale nanoparticle deposits independent of the substrate's nature and shape. No specific functionalization of the nanoparticles is required, and low concentrated solutions can be used. The density of NDs on the substrate can be controlled, as shown by in situ ATR-FTIR (attenuated total reflection Fourier transform infrared) analysis and QCM (quartz crystal microbalance) measurements. Highly dense and compact ND deposits can be obtained, allowing CVD growth of nanocrystalline diamond ultrathin films (70 nm) on various substrates. The synthesis of 3D structured and patterned diamond thin films has also been demonstrated with this method.
authors.affiliation: Laboratoire de Physique de la Matiere Condensee (PMC), CNRS - Ecole Polytechnique, F-91128 Palaiseau cedex, France.
authors.forename: Hugues A
authors.initials: HA
authors.lastname: Girard
authors.forename: Sandrine
authors.initials: S
authors.lastname: Perruchas
authors.forename: Céline
authors.initials: C
authors.lastname: Gesset
authors.forename: Marc
authors.initials: M
authors.lastname: Chaigneau
authors.forename: Laetitia
authors.initials: L
authors.lastname: Vieille
authors.forename: Jean-Charles
authors.initials: JC
authors.lastname: Arnault
authors.forename: Philippe
authors.initials: P
authors.lastname: Bergonzo
authors.forename: Jean-Pierre
authors.initials: JP
authors.lastname: Boilot
authors.forename: Thierry
authors.initials: T
authors.lastname: Gacoin