Growth mechanism of silicon-based functional nanoparticles fabricated by inductively coupled thermal plasmas

M. Shigeta, Takayuki Watanabe

研究成果: ジャーナルへの寄稿記事

50 引用 (Scopus)

抄録

An experimental and computational study is conducted for the Si-based functional nanoparticle fabrication in an inductively coupled thermal plasma reactor. In the computational study, the improved multi-component co-condensation model with nodal discretization is proposed to clarify the nanoparticle growth mechanism in the consideration of coagulation and thermophoresis as well as simultaneous co-condensation. The nanoparticle growth by nucleation and co-condensation completes approximately in 12.6 ms for the Mo-Si system and in 5.0 ms for the Ti-Si system. Mo nanoparticles grow in advance, and then Si vapour condenses on the Mo nanoparticles in the Mo-Si system, while vapours of Si and Ti simultaneously co-condense following Si nucleation in the Ti-Si system. A smaller number of larger nanoparticles are created with an increase in the powder feed rate. When the silicon content in the feed powders is 66.7%, nanoparticles of MSi2 (M ≤ Mo, Ti) are fabricated as the main product. Nanoparticles of Ti5Si3 are mainly synthesized in the case of the silicon content 33.0%. In the experiment, the nanoparticles are successfully fabricated and examined by x-ray diffractometry and transmission electron microscopy. The experimental and computational results show good agreement in the size distribution and the composition.

元の言語英語
記事番号S20
ページ(範囲)2407-2419
ページ数13
ジャーナルJournal of Physics D: Applied Physics
40
発行部数8
DOI
出版物ステータス出版済み - 4 21 2007

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Plasma Gases
thermal plasmas
Silicon
Nanoparticles
Plasmas
nanoparticles
silicon
Condensation
condensation
Powders
Nucleation
Vapors
nucleation
Thermophoresis
vapors
thermophoresis
Hot Temperature
coagulation
Coagulation
reactors

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Acoustics and Ultrasonics
  • Surfaces, Coatings and Films

これを引用

Growth mechanism of silicon-based functional nanoparticles fabricated by inductively coupled thermal plasmas. / Shigeta, M.; Watanabe, Takayuki.

:: Journal of Physics D: Applied Physics, 巻 40, 番号 8, S20, 21.04.2007, p. 2407-2419.

研究成果: ジャーナルへの寄稿記事

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abstract = "An experimental and computational study is conducted for the Si-based functional nanoparticle fabrication in an inductively coupled thermal plasma reactor. In the computational study, the improved multi-component co-condensation model with nodal discretization is proposed to clarify the nanoparticle growth mechanism in the consideration of coagulation and thermophoresis as well as simultaneous co-condensation. The nanoparticle growth by nucleation and co-condensation completes approximately in 12.6 ms for the Mo-Si system and in 5.0 ms for the Ti-Si system. Mo nanoparticles grow in advance, and then Si vapour condenses on the Mo nanoparticles in the Mo-Si system, while vapours of Si and Ti simultaneously co-condense following Si nucleation in the Ti-Si system. A smaller number of larger nanoparticles are created with an increase in the powder feed rate. When the silicon content in the feed powders is 66.7{\%}, nanoparticles of MSi2 (M ≤ Mo, Ti) are fabricated as the main product. Nanoparticles of Ti5Si3 are mainly synthesized in the case of the silicon content 33.0{\%}. In the experiment, the nanoparticles are successfully fabricated and examined by x-ray diffractometry and transmission electron microscopy. The experimental and computational results show good agreement in the size distribution and the composition.",
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