Nano Archive

Spectroscopic study of defects and inclusions in bulk poly-~and nanocrystalline diamond aggregates

Shiryaev, A A and Iakoubovskii, K and Grambole, D and Dubrovinskaia, N (2006) Spectroscopic study of defects and inclusions in bulk poly-~and nanocrystalline diamond aggregates. Journal of Physics: Condensed Matter, 18 (40). L493-L501.

Full text is not hosted in this archive but may be available via the Official URL, or by requesting a copy from the corresponding author.

Official URL: http://stacks.iop.org/0953-8984/18/L493

Abstract

Recently, a novel form of nanodiamond exhibiting unusual mechanical properties has been synthesized by high-pressure high-temperature (HPHT) treatment of C60 fullerene, amorphous carbon and diamond powder. In this study, we have characterized the dominant defects in this nanodiamond by a combination of optical absorption, luminescence, Raman, electron spin resonance and elastic recoil detection techniques. Unusually high concentrations ([?]0.4 at.%) of hydrogen and very low concentrations of nitrogen ([?]10[?]5 at.%) have been detected in diamond grown from C60. Although most of hydrogen is shown to originate from inclusions of foreign phases, such as water, significant concentrations ([?]0.01 at.%) of hydrogen were also detected as a point defect in the nanodiamond grains. Observed structural differences between the samples made from various carbonaceous materials are attributed to different behaviour of the starting compounds during HPHT treatment.

Item Type:Article
ID Code:5375
Deposited By:Prof. Alexey Ivanov
Deposited On:06 Feb 2010 11:10
Last Modified:06 Feb 2010 11:53

Repository Staff Only: item control page