| Autor: |
Jiménez-Arévalo, Nuria, Filoscia, Francesco, Marchiani, Dario, Frisenda, Riccardo, Betti, Maria Grazia, Rago, Ilaria, Pandolfi, Francesco, Cavoto, Gianluca, Mariani, Carlo |
| Předmět: |
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| Zdroj: |
Journal of Chemical Physics; 6/7/2024, Vol. 160 Issue 21, p1-7, 7p |
| Abstrakt: |
Alkali metal doping of multi-walled carbon nanotubes is of great interest, both fundamentally to explore the effect of dopants on quasi-one-dimensional electrical systems and for energy applications such as alkali metal storage. We present an investigation with complementary photoemission and Raman spectroscopies, fully carried out in an ultra-high vacuum, to unveil the electronic and vibrational response of a forest of highly aligned multi-walled carbon nanotubes by in situ potassium doping. The charge donation by the alkali adatoms induces a plasmon mode, and the density of states undergoes an energy shift consistent with electron donation and band filling of the multi-walled carbon nanotube band structure. The π-states in the valence band and the Raman peaks unveil an evolution that can be ascribed to charge donation and partially to a tensile strain exerted by the K adatoms on the carbon lattice. All these effects are thermally reversible, fostering these materials as a potential system for electronic charge harvesting. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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