Nano-crystals of c-diamond, n-diamond and i-carbon grown in carbon-ion implanted fused quartz

Peng, J.L., Orwa, J.O., Jiang, B., Prawer, S. and Bursill, L.A. 2001, Nano-crystals of c-diamond, n-diamond and i-carbon grown in carbon-ion implanted fused quartz, International journal of modern physics B, vol. 15, no. 23, pp. 3107-3123, doi: 10.1142/S0217979201007208.

Title Nano-crystals of c-diamond, n-diamond and i-carbon grown in carbon-ion implanted fused quartz
Author(s) Peng, J.L.
Orwa, J.O.ORCID iD for Orwa, J.O.
Jiang, B.
Prawer, S.
Bursill, L.A.
Journal name International journal of modern physics B
Volume number 15
Issue number 23
Start page 3107
End page 3123
Total pages 17
Publisher World Scientific Publishing
Place of publication Singapore
Publication date 2001-09-20
ISSN 0217-9792
Summary Combined high-resolution transmission electron microscopy, selected area electron diffraction and parallel electron energy loss spectroscopy are used to characterise carbon nano-phases found embedded in fused quartz. These appear after implantation of 1 MeV carbon ions, followed by annealing in argon, oxygen and forming gas for 1 hour at 1100°C. For Ar, virtually all of the carbon diffuses out of the substrate with no observable carbon clusters for all doses studied. After annealing in oxygen, a crystalline COx phase is identified at the end of range, following a dose of 5 1017 C/cm2. Three nano-crystalline carbon phases, including diamond, appear after annealing in forming gas: these form a layer 170 nm beneath the fused quartz surface for all ion doses. The average size of these clusters and the corresponding phases depend on the ion dose; the smallest size of 5-7 nm diameter crystallise as fcc Fdm diamond following a dose of 0.5 1017 C/cm2, whereas clusters of 8-13 nm diameter, for a higher dose of 2 1017 C/cm2, have a Fmm modified phase of diamond known as n-diamond. The largest clusters, diameter 15-40 nm, for a dose of 5 1017 C/cm2, have the cubic P213 (or P4232) structure known as i-carbon. These buried layered diamond and diamond-related materials may have applications for field emission and optical waveguide type devices.
Language eng
DOI 10.1142/S0217979201007208
Field of Research 091202 Composite and Hybrid Materials
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 ©[2001, The Authors]
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