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NANODIAMOND

Comprehensive study of nanodiamond and nanographite formation from molten carbon with and without the presence of hydrogen under varied conditions of external pressure and cooling rate by Adler, A. Sorkin and R. Kalish.
what Our success in nanodiamond formation exceeded those of other good computational groups and is in line with experiment; possibly a result of our use of visualization techniques for their identification. In the initial project (without hydrogen) our discovery of nanographite formation was a surprise.
what Recently, nanoscale graphitic layers embedded in amorphous carbon were observed experimentally.
what We found that hydrogen-free nanodiamond crystals are precipitated more readily at increased melt densities and cooling rates, whereas slower cooling rates permit formation of graphitic layers.
what In these visualizations we use different colors for sp1, sp2 or sp3 hybridized carbon atoms. For example: Red balls indicate sp3 bonded atoms, blue sp2, yellow sp, and large blue balls are hydrogen atoms.

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anastasia anastasia anastasia
Entire sample Nanodiamond cluster Sequential rotations