The electronic properties of functionalized SWCNTs assessed by photoemission and X-ray absorption spectroscopy
CIC nanoGUNE Seminars
- Speaker
-
Paola Ayala. Fakultät für Physik, University of Vienna, Vienna, Austria
- When
-
2010/09/22
14:00 - Place
- nanoGUNE seminar room, Tolosa Hiribidea 76, Donostia - San Sebastian
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Accessing the well known unique electronic and optical properties of single-
walled carbon nanotubes (SWCNTs), their semiconducting or metallic behaviour
and wall modifications is of great interest for further applications. Whether
we are dealing with the inevitable interactions of nanotubes in a bundle or
single doping defects, the energies of charge carriers and lattice vibrations
are modified.
For this reason, photoemission and x-ray absorption spectroscopy effectively
allow analysing the details in modifications of the underlying basic
correlation effects in the bonding environment. I will show our recent
progress on how metallicity-sorting, which has recently found significant
solutions, combined with high energy spectroscopy techniques can nicely
disentangle the characteristic density of states of SWCNTs unambiguously.
The various functionalization routes that allow modifying the electronic
properties of SWCNT will also be discussed, providing a solid basis for a
further insight into the influence of doping, chemical interactions on the
electronic ground state and the transport properties of SWCNTs. We will
analyze the charge transfer within various types of functionalized, doped,
filled and functionalized metallicity-sorted SWCNTs.