Fast Growth of Diamond Crystals in Open Air by Combustion Synthesis with Resonant Laser Energy Coupling
Rogers, Robin D.
Fast growth of diamond crystals in open air was achieved by combustion synthesis with resonant laser energy coupling. A premixed C2H4/C2H2/O2 gas mixture was used as precursors for growth of diamond crystals. Through the resonant excitation of the CH2 wagging mode of the ethylene (C2H4) molecules using a CO2 laser tuned at 10.532m, high-quality diamond crystals were grown on silicon substrates with a high growth rate at 139m/h. Diamond crystals with a length up to 5 mm and a diameter of 1 mm were grown in 36 h. Sharp Raman peaks at 1332 cm−1 with full width at half-maximum (fwhm) values around 4.5 cm−1 and distinct X-ray diffraction spectra demonstrated the high quality of the diamond crystals. The effects of the resonant laser energy coupling were investigated using optical emission spectroscopy.
Z. Q. Xie et al., "Fast Growth of Diamond Crystals in Open Air by Combustion Synthesis with Resonant Laser Energy Coupling," Crystal Growth & Design, American Chemical Society (ACS), Jan 2010.
The definitive version is available at http://dx.doi.org/10.1021/cg9014515
Mechanical and Aerospace Engineering
Article - Journal
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