Cu-C60 interaction and nano-composite structures

Experimental evidences for the formation of amorphous-like Cu-C-60 interface compounds were reported. Cu-C-60 nanocomposite films were prepared by co-deposition method. The mechanism for the electrical transport in the compound is the hopping conduction and the magnitude of the conductivity increases, while the activation energy decreases with the increasing of Cu ratio. There is a transition at about 260 K in the curves of conductivity versus temperature, indicating that the transport mechanisms are related to the rotational order-disorder transition of C-60 molecules. (C) 2000 Elsevier Science Ltd. All rights reserved.