Spectroscopic Sensing of O2-C2H2-C2H4 Flames for Diamond Growth Using Femtosecond Filamentation

Yun Shen Zhou; Meng Meng Wang; Yao Lu; Jean François Silvain; Yong Feng Lu

doi:10.1021/acs.cgd.7b00385

Spectroscopic Sensing of O₂-C₂H₂-C₂H₄ Flames for Diamond Growth Using Femtosecond Filamentation

Yun Shen Zhou, Meng Meng Wang, Yao Lu, Jean François Silvain, Yong Feng Lu

Electrical & Computer Engineering

Research output: Contribution to journal › Article

Abstract

The influence of the resonant vibrational excitation of the ethylene wagging mode (u₇, 949.3 cm^-1) on the combustion chemical vapor deposition of diamond was studied via femtosecond laser-induced filamentation (FLIF) spectroscopy. The O₂-C₂H₂-C₂H₄ flame filaments were sampled within the diamond-formation zones to investigate the evolution of the diamond-formation-related species. In addition to higher diamond growth rates, increasing the incident laser power density led to the transitions of diamond crystal facets and quality as the results of competition between carbon-containing and OH-containing species. Evaluated using the C₂/OH number density ratio, {100}-faceted diamond crystals were obtained at the C₂/OH ratio of 110.00, while {111}-faceted diamond crystals were produced at the C₂/OH ratio of 133.34.

Original language	English (US)
Pages (from-to)	3443-3449
Number of pages	7
Journal	Crystal Growth and Design
Volume	17
Issue number	6
DOIs	https://doi.org/10.1021/acs.cgd.7b00385
State	Published - Jun 7 2017

ASJC Scopus subject areas

Chemistry(all)
Materials Science(all)
Condensed Matter Physics

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Zhou, Y. S., Wang, M. M., Lu, Y., Silvain, J. F., & Lu, Y. F. (2017). Spectroscopic Sensing of O₂-C₂H₂-C₂H₄ Flames for Diamond Growth Using Femtosecond Filamentation. Crystal Growth and Design, 17(6), 3443-3449. https://doi.org/10.1021/acs.cgd.7b00385

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title = "Spectroscopic Sensing of O2-C2H2-C2H4 Flames for Diamond Growth Using Femtosecond Filamentation",

abstract = "The influence of the resonant vibrational excitation of the ethylene wagging mode (u7, 949.3 cm-1) on the combustion chemical vapor deposition of diamond was studied via femtosecond laser-induced filamentation (FLIF) spectroscopy. The O2-C2H2-C2H4 flame filaments were sampled within the diamond-formation zones to investigate the evolution of the diamond-formation-related species. In addition to higher diamond growth rates, increasing the incident laser power density led to the transitions of diamond crystal facets and quality as the results of competition between carbon-containing and OH-containing species. Evaluated using the C2/OH number density ratio, {100}-faceted diamond crystals were obtained at the C2/OH ratio of 110.00, while {111}-faceted diamond crystals were produced at the C2/OH ratio of 133.34.",

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AU - Silvain, Jean François

AU - Lu, Yong Feng

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