Microstructure evolution in carbon-ion implanted sapphire

Orwa, J.O., Peng, J.L., McCallum, J.C., Jamieson, D.N., Rubanov, S and Prawer, S. 2010, Microstructure evolution in carbon-ion implanted sapphire, Journal of applied physics, vol. 107, no. 2, pp. 1-6, doi: 10.1063/1.3284963.

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Title Microstructure evolution in carbon-ion implanted sapphire
Author(s) Orwa, J.O.ORCID iD for Orwa, J.O. orcid.org/0000-0001-6041-6751
Peng, J.L.
McCallum, J.C.
Jamieson, D.N.
Rubanov, S
Prawer, S.
Journal name Journal of applied physics
Volume number 107
Issue number 2
Article ID 023508
Start page 1
End page 6
Total pages 6
Publisher American Institute of Physics
Place of publication Melville, N.Y.
Publication date 2010-02-08
ISSN 0021-8979
Keyword(s) Science & Technology
Physical Sciences
Physics, Applied
crystal microstructure
ion implantation
secondary ion mass spectra
transmission electron microscopy
Summary Carbon ions of MeV energy were implanted into sapphire to fluences of 1× 1017 or 2× 1017 cm-2 and thermally annealed in forming gas (4% H in Ar) for 1 h. Secondary ion mass spectroscopy results obtained from the lower dose implant showed retention of implanted carbon and accumulation of H near the end of range in the C implanted and annealed sample. Three distinct regions were identified by transmission electron microscopy of the implanted region in the higher dose implant. First, in the near surface region, was a low damage region (L1) composed of crystalline sapphire and a high density of plateletlike defects. Underneath this was a thin, highly damaged and amorphized region (L2) near the end of range in which a mixture of i-carbon and nanodiamond phases are present. Finally, there was a pristine, undamaged sapphire region (L3) beyond the end of range. In the annealed sample some evidence of the presence of diamond nanoclusters was found deep within the implanted layer near the projected range of the C ions. These results are compared with our previous work on carbon implanted quartz in which nanodiamond phases were formed only a few tens of nanometers from the surface, a considerable distance from the projected range of the ions, suggesting that significant out diffusion of the implanted carbon had occurred.
Language eng
DOI 10.1063/1.3284963
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 ©2010, American Institute of Physics
Persistent URL http://hdl.handle.net/10536/DRO/DU:30091860

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