Dresden 2003 – wissenschaftliches Programm

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CPP: Chemische Physik und Polymerphysik

CPP 20: POSTER A

CPP 20.70: Poster

Montag, 24. März 2003, 19:00–21:00, ZEU/250

Electronic properties of the doping single-wall carbon nanotubes — •Xianjie Liu, Thomas Pichler, Martin Knupfer, and Jörg Fink — Leibniz-Institute for Solid State and Materials Research Dresden, P.O. Box 270016, D-01171 Dresden, Germany

We present recent studies of the structural and electronic properties of n-type (with alkali metals) and p-type (with FeCl₃) doped single-wall carbon nanotubes using high-resolution electron energy-loss spectroscopy in transmission. Changes in the nanotube structure and electronic properties due to intercalation were monitored by the spectroscopic measurements. The modulation of the nanotube bundle structure is reflected by the variations of the diffraction patterns. The core-level excitations show that there is no hybridization between nanotube π^⋆ states and metal valence states. The intensity of the interband transitions is dramatically affected, demonstrating the possibility of tuning the Fermi level to specific bands upon intercalation. The charge carrier plasmon depends on both the intercalation level and the intercalants.