Raman spectroscopy of nano-scale materials is facing a challenge of developing a physically sound quantitative approach for the phonon confinement effect, which profoundly affects the phonon Raman band shapes of small particles. We have developed a new approach based on 3-dimensional phonon dispersion functions. It analyzes the Raman band shapes quantitatively in terms of the particle size dist...

With the retention of many of the unrivaled properties of bulk diamond but in thin-film form, nanocrystalline diamond (NCD) has applications ranging from micro-/nano-electromechanical systems to tribological coatings. However, with Young’s modulus, transparency, and thermal conductivity of films all dependent on the grain size and nondiamond content, compositional and structural analysis of the...

Diamond/copper composite coating is promising for wear-resistant applications, owing to the extreme hardness of diamond reinforcement. Ti-coated diamond/copper coatings with various laser powers were successfully fabricated employing novel manufacturing technology supersonic deposition (SLD). diamond, which was able enhance wettability between and copper, prepared at optimal parameters via salt...

Nano-indentation at temperatures up to 600 °C has been applied the (0001) surface of highly oriented pyrolytic graphite using a spherical diamond tip (?10 ?m diameter). Cross-sectional observations indentations by dark field scanning transmission electron microscopy show an increased tendency high temperature for inelastic deformation buckling crystals with kink formation.

PURPOSE The aim of the present study was to investigate the wear resistance and hardness of five kinds of composite resins. MATERIALS AND METHODS Sixty-five specimens were fabricated with one nano-hybrid (Charisma Diamond), two micro-hybrid (3MZ250, Clearfil AP-X) and two packable (3MP60, Surefil) composite resins, according to a randomized complete block design (n=13, 8 for wear test; 5 for ...

Silicon-vacancy (SiV) centers in diamond are gaining an increased interest for application, such as quantum technologies and sensing. Due to the strong luminescence concentrated its sharp zero-phonon line at room temperature, SiV being investigated single-photon sources communication, also temperature probes Here, we discussed strategies fabrication of based on Si-ion implantation followed by t...

After initial proof-of-principle demonstrations, optically pumped nitrogen-vacancy (NV) centres in diamond have been proposed as a non-invasive platform to achieve hyperpolarisation of nuclear spins molecular samples over macroscopic volumes and enhance the sensitivity magnetic resonance (NMR) experiments. In this work, we model process polarisation external by NV theoretically evaluate their p...

Ti-TiC-TiC/diamond-like carbon (DLC) gradient nano-composite films have been prepared on NiTi alloy substrates by the technique of plasma immersion ion implantation and deposition (PIIID) combined with plasma-enhanced chemical vapor deposition (PECVD). The influence of negative bias voltage applied to the substrate (from -100 V to -500 V) on the chemical structure, microstructure, mechanical pr...