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Size dependence of structural stability in nanocrystalline diamond

Prawer, S., Peng, J.L., Orwa, J.O., McCallum, J.C., Jamieson, D.N. and Bursill, L.A. 2000, Size dependence of structural stability in nanocrystalline diamond, Physical review B, vol. 62, no. 24, pp. 1-4, doi: 10.1103/PhysRevB.62.R16360.

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Title Size dependence of structural stability in nanocrystalline diamond
Author(s) Prawer, S.
Peng, J.L.
Orwa, J.O.ORCID iD for Orwa, J.O. orcid.org/0000-0001-6041-6751
McCallum, J.C.
Jamieson, D.N.
Bursill, L.A.
Journal name Physical review B
Volume number 62
Issue number 24
Start page 1
End page 4
Total pages 4
Publisher American Physical Society
Place of publication Ridge, N.Y.
Publication date 2000-12-15
ISSN 0163-1829
Summary We describe experiments which demonstrate that carbon atoms introduced into a fused-silica substrate by means of MeV ion implantation can, after suitable annealing, form nanocrystalline diamond. Unlike other methods of creating diamond, the coalescence of the carbon into diamond nanocrystals occurs when the samples are heated in a conventional furnace and does not require the application of high external pressures, or any pre-existing diamond template. Following a dose of 5 × 1016 C/cm2 into fused quartz and after annealing in forming gas (4% hydrogen in argon), perfect cubic diamond crystallites of 5-7 nm diameter are formed. For higher doses, the same annealing treatments produce larger crystallites which are comprised of other varieties of solid carbon phases. We conclude that diamond is the stable form of carbon provided that the crystallite size is sufficiently small (less than 7 nm) and that the nanocrystallites are appropriately surface passivated.
Language eng
DOI 10.1103/PhysRevB.62.R16360
Field of Research 020406 Surfaces and Structural Properties of Condensed Matter
Socio Economic Objective 970102 Expanding Knowledge in the Physical Sciences
HERDC Research category C1.1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2000, American Physical Society
Persistent URL http://hdl.handle.net/10536/DRO/DU:30091891

Document type: Journal Article
Collection: School of Engineering
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