Abstract
Raman scattering spectra and the temperature dependence of the electrical conductivity are used to caharacterize turbostatic glassy carbon samples subjected to heat treatment at various temperatures. Raman spectra indicate a disordered graphitic character of the samples and are used to estimate the average crystallite size. The conductivity shows metallic and hopping contributions. The mean free path estimated from the metallic term in the conductivity is sydtematically lower than the average crystallite size. Both parameters increase with increasing heat treatment temperature. The heat treatment was found to influence the conductivity type.
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