electronic structureThe structural and electronic properties of diamond and graphite were investigated by the first-principles total-energy pseudopotential method based on density functional theory. The band structure, DOS and PDOS were calculated. Results showed that diamond had a wide band gap, and ...
Graphite and diamonds are made up of carbon atoms. Graphite, however, is soft and can be used to write with while diamonds are the hardest substance known to man and are the only substances that can be used to cut other diamonds. What is the main rea...
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2 Structure differences among three symmetrical ITB configurations. a, I. b, II. c, III. The corresponding structural models are shown as insets in the corresponding HAADF-STEM images. Atomic distances along the three lines (orange, red, and green) are measured with the profiles below each ...
Grain boundaries (GBs), with their diversity in both structure and structural transitions, play an essential role in tailoring the properties of polycrystalline materials1–5. As a unique GB subset, {112} incoherent twin boundaries (ITBs) are ubiquitous
I was conversing with ChatGPT when I asked which material has the highest melting point, and it answered "tungsten" (giving its melting temperature). It so happened that in the previous question the melting point of graphite had come up, and it was listed as higher than that. When I ask...
However, to elucidate the mechanisms of catalytically assisted graphitization, not only the structural features of the etched diamond, also the Ni catalyst and the catalytically formed graphite need to be investigated. In this respect, we recently turned to transmission electron microscopy (TEM) to ...
The electronic structure of samples produced by nanodiamond annealing has been examined using ultra-soft X-ray emission and X-ray absorption spectroscopy. Analysis of spectra of diamond/graphite composites showed that carbon atoms constituting the nanoparticles are at least in three states: diamond-like...
Theoretical diffraction patterns have been computed with the use of a known spatial structure of a spherical two-phase nanocrystal particle consisting of a diamond core and an outer graphite shell. This approach not only allowed direct determination of the structure of nanosized crystals but also ...
Y. Lee for preliminary XRD measurements at the 9C beamline of Pohang Accelerator Laboratory to evaluate the crystalline property of the diamond sample, and B. Cunning for suggesting the EDM-3 Poco Graphite sheet material and for discussions. The experiments at the PLS-II 6D and 9 C beamline...