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Fe/Ti oxide films with graded composition profiles have been prepared from aqueous metal‐fluoro complex solutions by the liquid phase deposition method. Films were deposited from a solution, in which the (NH 4 ) 2 TiF 6 solution was added under a controlled flow rate into the FeOOH–NH 4 F·HF solution. Transmission electron microscopy and X‐ray microanalysis of the films revealed that the composition and graded profile of the deposited films in depth direction could be controlled by adjusting the mixing conditions of the reacting solution. Along with the change in composition, the microstructure of the films changes from microcrystalline β‐FeOOH at the base to nanocrystalline anatase TiO 2 near the surface.
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Deki et al. (2005) studied this question.
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