Flexible carbonaceous and graphitized films by pyrolytic chemical-vapor-deposition method from hydrocarbons containing oxygen atoms

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Abstract
Carbonaceous films with high conductivity have been prepared by a pyrolytic chemical‐vapor‐deposition method using hydrocarbons containing oxygen atoms, phenols, carboxylic acids, etc. The films obtained are self‐supporting and flexible. The electrical conductivities of the films depend on the pyrolyzing temperature but not remarkably on the kind of raw materials. The films are converted to high‐quality graphitized films with conductivity of 1.6×104 S/cm by heating under an Ar atmosphere to 2800 °C. The electrical conductivity and thermoelectric power of the films are examined as a function of the heat‐treatment temperatures. The excellent property of the films obtained in this study seems to arise from the effect of oxygen atoms in the process of condensed aromatic ring formation by pyrolysis.