AXC60 THIN-FILM WITH ELECTROCHEMICALLY DOPED ALKALI-METALS

Electrochemical properties of a C60 film and it protected by a polyimi de layer were investigated with cyclic voltammetry in KClO4/(CH3)2SO s olution. The observed three reduction reactions correspond to the form ation of the three potassium salts KxC60 (x=1,2,3). Though the concent ration of the doped potassium x was still very little and about 0.15, the resistivity of the KxC60 film became four orders in magnitude smal ler than the C60 film. The obtained results revealed the high possibil ity of the electrochemical alkali metal-dope into the C60 film even th rough the protect layer and opened the new technique for the research of superconductivity of a metal-doped C60.