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| 2. |
- Schiessling, Joachim, et al.
(författare)
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Synchrotron radiation study of the electronic structure of multiwalled carbon nanotubes
- 2003
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Ingår i: Journal of Physics. - : IOP Publishing. - 0953-8984 .- 1361-648X. ; 15:38, s. 6563-
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Tidskriftsartikel (refereegranskat)abstract
- We present photoelectron (PE) and x-ray absorption spectra (XAS) of macroscopically aligned multiwalled carbon nanotubes. We identify the peaks in the valence PE spectra with regions of high density of states through comparison to calculations for graphite. Finally, we outline and illustrate a simple method for using XAS to determine the average alignment of a nanotube sample.
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| 3. |
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| 4. |
- Schnadt, J, et al.
(författare)
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Electron-spectroscopy study of LiC60: Charge transfer and dimer formation
- 2000
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Ingår i: PHYSICAL REVIEW B. - : AMERICAN PHYSICAL SOC. - 0163-1829. ; 62:7, s. 4253-4256
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Tidskriftsartikel (refereegranskat)abstract
- Li-C-60 compounds LixC60 were studied for average Li concentration (x) over bar less than or equal to 1 using photoelectron spectroscopy. Strong evidence is found for the formation of LiC60 dimers, as well as a second phase. The study suggests that the sm
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| 5. |
- Sveningsson, M., et al.
(författare)
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Raman spectroscopy and field-emission properties of CVD-grown carbon-nanotube films
- 2001
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Ingår i: Applied Physics a-Materials Science & Processing. ; 73, s. 409-418
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Tidskriftsartikel (refereegranskat)abstract
- Carbon-nanotube films are very efficient cathodes for field-emission devices. This study presents a comprehensive comparison between structural, spectroscopic and field-emission properties of films of aligned and non-aligned multi-wall nanotubes (MWNTs) which are grown by thermal chemical vapour deposition. Three types of films are investigated: vertically aligned MWNTs with clean and coated nanotube side walls as well as non-aligned MWNT films. Raman spectra taken on the aligned MWNT films consist of many lines of first-, second- and third-order signals. Several lines are reported here far the first time for MWNTs. The presence of the surface coating leads to a decrease and broadening of the higher-order signals as well as an increase in the disorder-induced contributions in the first-order regime. The aligned MWNT films have excellent field-emission properties with very high emission current densities and low turn-on and threshold fields. The presence of a surface coating has no impact on the efficiency of the field-emission process. Films of non-aligned MWNTs show considerably reduced electron-emission current densities and larger critical fields.
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