Abstract
The peak near 1150 ${\mathrm{cm}}^{\mathrm{\ensuremath{-}}1}$ in the visible Raman spectra of poor quality chemical-vapor-deposited diamond is often used as the signature of nanocrystalline diamond. We argue that this peak should not be assigned to nanocrystalline diamond or other ${\mathrm{sp}}^{3}$-bonded phases. Its wave number disperses with excitation energy, its intensity decreases with increasing excitation energy, and it is always accompanied by another peak near 1450 ${\mathrm{cm}}^{\mathrm{\ensuremath{-}}1}$, which acts similarly. This behavior is that expected for ${\mathrm{sp}}^{2}$-bonded configurations, with their smaller band gap. The peaks are assigned to transpolyacetylene segments at grain boundaries and surfaces.
Keywords
Energy (signal processing)Nanocrystalline materialDiamondRaman spectroscopyExcitationMaterials scienceIntensity (physics)Spectral lineAnalytical Chemistry (journal)PhysicsCrystallographyAtomic physicsNanotechnologyChemistryOpticsQuantum mechanicsMetallurgy
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Publication Info
- Year
- 2001
- Type
- article
- Volume
- 63
- Issue
- 12
- Citations
- 1164
- Access
- Closed
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Cite This
Andrea C. Ferrari,
John Robertson
(2001).
Origin of the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mn>1</mml:mn><mml:mn>1</mml:mn><mml:mn>5</mml:mn><mml:mn>0</mml:mn><mml:mo>−</mml:mo><mml:mrow><mml:msup><mml:mrow><mml:mi mathvariant="normal">cm</mml:mi></mml:mrow><mml:mrow><mml:mi>−</mml:mi><mml:mn>1</mml:mn></mml:mrow></mml:msup></mml:mrow></mml:math>Raman mode in nanocrystalline diamond.
Physical review. B, Condensed matter
, 63
(12)
.
https://doi.org/10.1103/physrevb.63.121405
Identifiers
- DOI
- 10.1103/physrevb.63.121405