Ultra thin microporous carbon films are derived via the pyrolysis of phenolic precursors. The latter can be prepared fro mresorcinol-formaldehyde resins using a base catalyst. After several hours at 50 deg C of curing, the solution forms a stable polymeric film. Followed by a solvent exchange and ambient pressure drying, the film is pyrolysed in argon atmosphere at temperatures above 800 deg C. The result is an electrically conducting polymeric carbon film, the structure of which resembles the organic precursor, but hsows microporosity in addition. Hereby, films with thicknesses of >=5 microns and sufficient mechanical stability can be made.
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