Large stress reduction induced by sp2 clustering in tetrahedral amorphous carbon films

Y. B. Zhang, Shu Ping Lau, S. Prawer, B. K. Tay

Research output: Journal article publicationJournal articleAcademic researchpeer-review


The intrinsic stress of tetrahedral amorphous carbon film as a function of annealing temperature is investigated. The film was deposited using the filtered cathodic vacuum arc technique and subsequently annealed at various temperatures. The stress is determined by Stoney's equation using surface profilometry, and the microstructure is studied using atomic force microscopy, visible and ultraviolet Raman spectroscopy. It is found that as the annealing temperature increases the film stress decreases slowly up to 500°C and then falls quickly at 600°C. It is interesting to note that at this temperature sp3 fraction retains while sp2clustering begins, which contributes to the sharp decrease in the stress.
Original languageEnglish
Pages (from-to)39-42
Number of pages4
JournalJournal of Metastable and Nanocrystalline Materials
Publication statusPublished - 1 Jan 2005
Externally publishedYes


  • Clustering
  • Raman Spectroscopy
  • Stress
  • Tetrahedral Amorphous Carbon

ASJC Scopus subject areas

  • Materials Science (miscellaneous)
  • Materials Science(all)
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry


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