Abstract
C 60 and higher fullerenes are efficiently produced by the J × B gas-arc method. From the produced soot, C 60, C 70 and C 84 are extracted and purified by the liquid chromatography method. C 60, C 70 and C 84 thin films with a thickness of 1–4 μm are produced by the vacuum sublimation method, and their dielectric properties are investigated. Both the real and imaginary parts of the dielectric constants of C 60, C 70 and C 84 are very high at a low frequency ( f = 120 Hz) and they monotonically decrease with time when the films are exposed to air. After sufficient absorption of oxygen, these dielectric constants become almost the same.
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