CHARGE TRANSFER IN DOPED SINGLE WALL CARBON NANOTUBES

We report on the charge transfer in intercalated SWCNT and C 60 peapods. Differences between n-doping (K-intercalation) and p-doping (FeCl 3 -intercalation) are discussed. For the peapods a competition between a charge transfer to the SWCNT pods and one to the C 60 peas is observed. At low intercalation levels the charge transfer is predominantly to the SWCNTs. In addition at high levels of potassium intercalation the C 60 pods are charged up to C 60 6- and form a metallic one dimensional polymer.