Some initial attempts at the intercalative doping of C60 thin films by the diffusion of metals were reported. Two techniques were used: chemically-induced counter-electrodiffusion of Cu and I2 into a C60 matrix, and Au diffusion under the action of an external electric field.

Electrodiffusion Phenomena in C60 Thin Films. E.A.Katz, D.Faiman, S.M.Tuladhar, S.Shtutina, N.Froumin, M.Polak: Physics of the Solid State, 2002, 44[3], 493-6