Abstract
The azafullerene C59N is synthesized by a nitrogen plasma irradiation method, which has been confirmed by the analysis of mass spectroscopy. The encapsulation of C59N inside single-walled carbon nanotubes (SWNTs) is practiced via a vapor diffusion method. Electrical transport properties of C60 and C59N encapsulated SWNTs are investigated by fabricating them as the channels of FET devices at room temperature. It is found that the electrical transport properties of C60@SWNTs exhibit the enhanced p-type characteristics compared with the case of pristine SWNTs, whereas C59N@SWNTs show the n-type behavior. The novel transport properties of peapods can be explained by the charge-transfer effect, which can modify the electronic structure of SWNTs.
