Abstract
If evaporated carbon films are prepared by the conventional method used for metals, the filament left after evaporation is comparable in area with the film and interferes with any attempt to study the adsorptive behavior of the film itself. A technique has been developed for removing the carbon filament from the reaction vessel after evaporation. Carbon films (mean thickness ca. 500 Å), produced on cooled Pyrex and isolated in this way, are estimated from krypton adsorption at — 183°C to have surface areas of about 60 m2 g−1; their behavior towards hydrogen and oxygen was investigated from — 183°C to 400°C and 150°C respectively.
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