M. Montalti
Photoemission spectroscopy of clean and potassium-intercalated carbon onions
Montalti, M.; Krishnamurthy, S.; Chao, Y.; Butenko, Y.V.; Kuznetsov, V.L.; Dhanak, V.R.; Hunt, M.R.C.; Šiller, L.
Authors
S. Krishnamurthy
Y. Chao
Y.V. Butenko
V.L. Kuznetsov
V.R. Dhanak
Dr Michael Hunt m.r.c.hunt@durham.ac.uk
Associate Professor
L. Šiller
Abstract
Hollow onionlike carbon (OLC), generated by annealing nanodiamond at 2140 K, has been studied by core-level and valence-band photoemission spectroscopy. Upon intercalation with potassium, core and valence states of the OLC show an almost rigid shift to higher binding energies, and the density of states at the Fermi level (EF) is observed to increase. An asymmetric broadening of the C1s line from the OLC as intercalation proceeds indicates an increase in electron-hole pair excitations. Both core and valence-band spectra are consistent with charge transfer from the intercalated potassium to the OLC, and support the conclusion that the electronic structure of the carbon onions bears strong similarity to that of graphite, although differences do exist. In consequence the conclusion can be drawn that these species behave as graphite ``nanocrystals'' rather than as large fullerene molecules.
Citation
Montalti, M., Krishnamurthy, S., Chao, Y., Butenko, Y., Kuznetsov, V., Dhanak, V., …Šiller, L. (2003). Photoemission spectroscopy of clean and potassium-intercalated carbon onions. Physical review B, 67(11), https://doi.org/10.1103/physrevb.67.113401
Journal Article Type | Article |
---|---|
Publication Date | Mar 6, 2003 |
Deposit Date | Nov 28, 2006 |
Journal | Physical Review B |
Print ISSN | 1098-0121 |
Electronic ISSN | 1550-235X |
Publisher | American Physical Society |
Peer Reviewed | Peer Reviewed |
Volume | 67 |
Issue | 11 |
DOI | https://doi.org/10.1103/physrevb.67.113401 |
Keywords | Energy-loss spectroscopy, Graphite, Diamond, Temperatures, Fullerenes, Band. |
Public URL | https://durham-repository.worktribe.com/output/1591930 |
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