Young's modulus, fracture strength, and Poisson's ratio of nanocrystalline diamond films

Abstract

A special relation between Young's modulus, Rayleigh-wave velocity, and Poisson's ratio

Thermal conductivity of nanocrystalline diamond films grown by hot filament chemical vapor deposition

“…Nanocrystalline diamond films grown under different growth conditions can exhibit similar average grain sizes but rather different elastic properties which also affect the thermal properties . Also the thermal conductivities of nanocrystalline diamond films show a wide range .…”

Modeling of mechanical resonators used for nanocrystalline materials characterization and disease diagnosis of HIVs

“…A reduction in the effective Young's modulus of the NcM is observed when decreasing the resonator size and hence the grain average size (Mohr et al 2014). It had been attributed to the increase in the volume fraction of the grain boundary which has a lower Young's modulus due to the increase in the interatomic spacing and the increase in the amount of impurities residing in the grain boundary.…”

“…(9) and hence the grain boundary Young's modulus could be obtained. The Young's modulus of the grain boundary of nanocrystalline diamond has been investigated in a recent work using microresonators (Mohr et al 2014). Two cantilever specimens (L = 1,500 μm, b = 200 μm, and h = 17 μm) are fabricated and their resonant frequencies are measured to be used for the Young's modulus estimations.…”

“…It is a device that a Could be obtained using X-ray diffraction (Mohr et al 2014) or by monitoring the SEM image of the specimen b Calculated using Eq. (17) for a grain boundary thickness t = 0.5 nm (Kim and Bush 1999) c Calculated by the Archimedean method (Mohr et al 2014) d is made up of a biological material, such as micro-organisms, tissue, enzymes, antibodies or biologically derived material that acts as the recognition molecules (Tothill 2009;Darsanaki et al 2013). These biosensors have to be utilized in conjunction with or attached to a resonator that can give an electronic signal proportional to the concentration of a specific analyte or group of analytes.…”

“…It had been attributed to the increase in the volume fraction of the grain boundary which has a lower Young's modulus due to the increase in the interatomic spacing and the increase in the amount of impurities residing in the grain boundary (Mohr et al 2014;Gleiter et al 2000;Wang et al 2003;Kim and Bush 1999;Zhou et al 2007;Duan et al 2005;Fitzsimmons et al 1995;Swygenhoven et al 1999;Sanders et al 1997). Thus, the atomic structure as well as the Young's modulus of the grain boundary significantly affects the behavior of NcMs in different applications.…”