Abstract
Ion-exchangeable thin films of inorganic compounds were prepared by the soft-chemical method. A thin film composed of a layered titanate was prepared by exfoliation of the layered compound H −/Cs xTi (2−x/4) x/4 O 4 in an aqueous ethyl amine solution. The exfoliated titanate sheets were easily oriented on a substrate by means of spin-coating. A layered potassium niobate, K 4Nb 6O 17, was made into a thin film from suspension of fine particles prepared by wet-grinding of the original K 4Nb 6O 17 powder. After calcination at 1073 K, the K 4Nb 6O 17 thin film had a well-ordered layered structure with the b-axis perpendicular to the substrate surface. The ion-exchange property of those films enabled the intercalation of other cations without destroying the layered structures.
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