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

Research output: Contribution to journalArticle

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 languageEnglish (US)
Pages (from-to)3443-3449
Number of pages7
JournalCrystal Growth and Design
Volume17
Issue number6
DOIs
StatePublished - Jun 7 2017

ASJC Scopus subject areas

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

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