Stacks of fullerene layers were constructed on the ITO surface. The cyclic
voltammetry and chronopotentiometry showed that the diffusion of Fe(CN)(6)(
-3) to the ITO surface is inhibited in the presence of the fullerene layers
, and that electrons are transferred across the fullerene films. Unidirecti
onal electron transfer was observed, indicating a rectifying character of t
he fullerene-modified ITO electrodes.