Characterisation of defects in amorphous carbon by electron paramagnetic resonance

A review is given of what has been learnt about defects in hydrogenated and non-hydrogenated amorphous carbon using the technique of electron paramagnetic resonance (EPR). Firstly, there is a brief description of how the population of defects can be obtained and of the uncertainties and possible err...

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Bibliographic Details
Published in:Diamond and related materials 2003, Vol.12 (8), p.1427-1434
Main Author: Barklie, R.C.
Format: Article
Language:English
Subjects:
Amorphous carbon
Color centers and other defects
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Defects
Electron paramagnetic resonance
Electron paramagnetic resonance and relaxation
Exact sciences and technology
Magnetic resonances and relaxations in condensed matter, mössbauer effect
Physics
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Summary:A review is given of what has been learnt about defects in hydrogenated and non-hydrogenated amorphous carbon using the technique of electron paramagnetic resonance (EPR). Firstly, there is a brief description of how the population of defects can be obtained and of the uncertainties and possible errors which may arise. A summary is then presented of the main results obtained so far by EPR—in particular the variation of the spin density and EPR linewidth with changes in structure and composition of a-C and a-C:H. An interpretation of the data is given and suggestions are made about the nature of the defects.
ISSN:0925-9635
1879-0062
DOI:10.1016/S0925-9635(03)00004-9