Diamond nucleation enhancement by direct low-energy ion-beam deposition

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)22_Publication in policy or professional journal

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Author(s)

  • X. S. Sun
  • H. Y. Peng
  • N. Wang
  • I. Bello
  • S. T. Lee

Detail(s)

Original languageEnglish
Pages (from-to)5579-5586
Journal / PublicationPhysical Review B - Condensed Matter and Materials Physics
Volume61
Issue number8
Publication statusPublished - 2000

Abstract

Direct ion beam deposition was successfully applied for the nucleation of nanodiamond crystallites on mirror-polished Si(001) substrates. Low-energy (80-200 eV) argon, hydrocarbon, and hydrogen ions from a Kaufman ion source were used. An amorphous carbon film was deposited on the substrate after ion bombardment. The films were characterized by high-resolution transmission electron microscopy, selected area electron diffraction, secondary electron microscopy, and micro-Raman spectroscopy. At ion doses above 1 × 1018 cm-2, nanocrystalline diamond particles of 50-100 Å in diameter were formed in a matrix of amorphous carbon. These diamond nanocrystals served as nucleation centers for subsequent diamond growth by conventional hot filament chemical vapor deposition. The nucleation density depended strongly on the ion dosage, and a nucleation density of 3 × 109 cm-2 could be achieved under optimized conditions. These results were found very helpful for the evaluation of the mechanism of ion-bombardment-induced nucleation of diamond. ©2000 The American Physical Society.

Citation Format(s)

Diamond nucleation enhancement by direct low-energy ion-beam deposition. / Zhang, W. J.; Sun, X. S.; Peng, H. Y.; Wang, N.; Lee, C. S.; Bello, I.; Lee, S. T.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 61, No. 8, 2000, p. 5579-5586.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)22_Publication in policy or professional journal