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Evolution of sp2 bonding with deposition temperature in tetrahedral amorphous carbon studied by Raman spectroscopy
Abstract
Two transitions in the bonding are found in tetrahedral amorphous carbon (ta-C) films as a function of deposition temperature. The total sp3 fraction shows a sharp decrease at a transition temperature of order 250 °C. In contrast, visible Raman finds that the sp2 sites show a gradual ordering into the graphitic clusters through the sharp bonding transition. The optical gap and resistivity show a similar, gradual transition. This indicates that the sp2 cluster size determines the optical gap, even when the sp2 content does not change. The Raman I(D)/I(G) peak ratio is found to vary inversely with the square of the gap.
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Cited by
Light Absorption by Carbonaceous Particles: An Investigative Review
Bond, T. C., & Bergstrom, R. W. (2006) · Aerosol Science and Technology · doi:10.1080/02786820500421521 · Cited by 2,980
Metadata
- Authors
- Chhowalla, M., Ferrari, A. C., Robertson, J., & Amaratunga, G. A. J.
- Venue
- Applied Physics Letters
- Publisher
- AIP Publishing
- Published
- 2000-03-13
- Volume
- 76
- Issue
- 11
- Pages
- 1419-1421
- ISSN
- 0003-6951 (ISSN-L)
- 1077-3118
- OpenAlex
- W2132278004
- Cited by
- 280
- References
- 0
- FWCI
- 12.74
- Type
- journal article
- Language
- en
- Open access
- closed
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- Chhowalla, M., Ferrari, A. C., Robertson, J., & Amaratunga, G. A. J. (2000). Evolution of sp2 bonding with deposition temperature in tetrahedral amorphous carbon studied by Raman spectroscopy. Applied Physics Letters. https://doi.org/10.1063/1.126050
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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