@inproceedings{0ec61035bec941d7971e3ac90bd50633,
title = "Laser-assisted synthesis of diamond crystals in open air through vibrational excitation of precursor molecules",
abstract = "Fast growth of diamond crystals in open air was achieved by laser-assisted combustion synthesis through vibrational excitation of precursor molecules. A wavelength-tunable CO2 laser (spectrum range from 9.2 to 10.9 μm) was used for the vibrational excitation in synthesis of diamond crystals. A pre-mixed C2H4/C2H2/O2 gas mixture was used as precursors. Through resonant excitation of the CH 2-wagging mode of ethylene (C2H4) molecules using the CO2 laser tuned at 10.532 μm, high-quality diamond crystals were grown on silicon substrates with a high growth rate of ∼139 μm/hr. Diamond crystals with a length up to 5 mm and a diameter of 1 mm were grown in 36 hours. 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 excitation of precursor molecules by the CO2 laser were investigated using optical emission spectroscopy.",
keywords = "Diamond crystal, Energy coupling, Ethylene molecule, Resonant excitation, Vibrational mode, Wavelength-tunable CO laser",
author = "Xie, {Z. Q.} and Zhou, {Y. S.} and He, {X. N.} and Y. Gao and Park, {J. B.} and T. Guillemet and Lu, {Y. F.}",
year = "2011",
doi = "10.1117/12.877531",
language = "English (US)",
isbn = "9780819484581",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
booktitle = "Laser-Based Micro- and Nanopackaging and Assembly V",
note = "Laser-Based Micro- and Nanopackaging and Assembly V ; Conference date: 25-01-2011 Through 27-01-2011",
}