Estimation of redox potential of strained si by density functional theory calculation

Kaoruho Sakata, Shoji Ishizaki, Hiromi Nakai, Takayuki Homma

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The effect of lattice strain in strained Si wafer surfaces was investigated with the redox potential as an index parameter for the evaluation of the surface reactivity. The redox potential was calculated by density functional theory calculations. The Gibbs free energies of strained Si, Sio2, H2O, and H2, which are components of the equation that represents the redox potential, were estimated from the calculated energies. The results suggested that the strain in the Si lattice shifts the redox potential in the negative direction, and the amount of shift was estimated to be approximately 10 mV when the degree of strain in Si was 3%. In addition, the Si HOMO energy, which was related to the redox potential, increased with the lattice strain, indicating that the increase in HOMO energy induces the potential shift and possibly the surface reactivity.

Original languageEnglish
Pages (from-to)3538-3542
Number of pages5
JournalJournal of Physical Chemistry C
Volume112
Issue number10
DOIs
Publication statusPublished - 2008 Mar 13

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films

Fingerprint Dive into the research topics of 'Estimation of redox potential of strained si by density functional theory calculation'. Together they form a unique fingerprint.

  • Cite this