Abstract
The structure of oxide films, which could be used as replicas for electron microscopy, was investigated here. In order to obtain a replica of the metal surface using the oxide film formed on it and isolated from it, the oxide crystals composing the film must be oriented relative to the orientation of the substrate face. The oxide crystals formed on metal, whose atom distances coincided with those of the substrate crystal, could compose a replicating film of the specimen surface. This oxide film did not curl nor expand upon removal from the substrate.

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