Deposition time dependence of the morphology and properties of tin-catalyzed silicon oxide nanowires synthesized by the gas-jet electron beam plasma chemical vapor deposition method

A. O. Zamchiy, Baranov, S. Ya Khmel, E. A. Maximovskiy, D. V. Gulyaev, K. S. Zhuravlev

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

SiOx nanowires (SiOxNWs, x ≤ 2) were grown by gas-jet electron beam plasma chemical vapor deposition method according to the vapor-liquid-solid mechanism at different synthesis times (tdep = 0.5–5 min) using tin particles as a catalyst. Microropes of SiOxNWs were obtained at tdep of more than 1 min. The average growth rate of nanowires was about 19 nm/s. Fourier transform infrared (FTIR) spectroscopy shows that SiOxNWs synthesized at different tdep are very similar in chemical composition (x ≈ 2) and in the bonding network of SiOx. FTIR spectroscopy data on the chemical composition of nanowires are in good agreement with the results of X-ray energy dispersive spectroscopy (EDS) analysis. EDS mapping of silicon and oxygen indicates that the atoms are uniformly distributed in the nanowires. Also, FTIR measurements showed that a significant number of water-adsorbing silanol groups formed on the surface of the nanowires. Photoluminescence spectra of nanowires obtained at different tdep are typical of SiO2 and exhibit a broad band in the region 400–600 nm centered at ~475 nm. The contact angle for SiOxNWs is <21° and decreases to 4.4° with increasing tdep, indicating a superhydrophilic coating.

Original languageEnglish
Pages (from-to)61-68
Number of pages8
JournalThin Solid Films
Volume654
DOIs
Publication statusPublished - 31 May 2018

Keywords

  • Hydrophilicity
  • Nanowires
  • Photoluminescence
  • Plasma-enhanced chemical vapor deposition
  • Silicon oxide
  • Vapor-liquid-solid mechanism
  • MECHANISM
  • SIOXHY THIN-FILMS
  • ANODES
  • PRESSURE
  • SPECTROSCOPY
  • LUMINESCENCE
  • GROWTH
  • SURFACE
  • ABSORPTION
  • SIO2

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