Synchrotron radiation induced decomposition of closo-1,2-dicarbadodecaborane

Dongjin Byun, Seong Don Hwang, Jiandi Zhang, Hong Zeng, F. Keith Perkins, G. Vidali, P. A. Dowben

Research output: Contribution to journalArticle

18 Scopus citations

Abstract

We have observed that molecular films of closo- 1,2-dicarbadodecaborane (C2B10H12) decompose due to ex-posure to synchrotron light. Dissociation results in films that form a heterogeneous intermediate phase between associative molecular fragments and solid, thin film boron-carbide. This heterogeneous phase has an observed electronic structure that is an admixture of the electronic structure observed for molecularly condensed orthocar- borane and the electronic structure anticipated for rhombohedral boron-carbide (based on the B12 icosahedral “building block”). With the synchrotron radiation exposure at room temperature there is dissociative adsorption of this icosahedral molecule and the growth of boron-carbide film is enhanced. The composition of the growing film changes for very thin films on Si(111), as determined by the boron to carbon ratio. The boron concentration of the film increases with increasing film thickness until the boron to carbon ratio reaches 5 when the film thickness is approximately 12 Å. After about 12 Å of film growth the composition is constant, i.e. B5C.

Original languageEnglish (US)
Pages (from-to)L941-L944
JournalJapanese Journal of Applied Physics
Volume34
Issue number7
DOIs
StatePublished - Jul 1995

Keywords

  • Chemical vapor deposition
  • Heterojunction
  • Orthocarborane
  • Synchrotron radiation
  • Thin film growth

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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    Byun, D., Hwang, S. D., Zhang, J., Zeng, H., Perkins, F. K., Vidali, G., & Dowben, P. A. (1995). Synchrotron radiation induced decomposition of closo-1,2-dicarbadodecaborane. Japanese Journal of Applied Physics, 34(7), L941-L944. https://doi.org/10.1143/JJAP.34.L941