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A β-phase of sodium-vanadium oxide bronze thin film has been synthesized by using sol-gel technology from V_2O_5 and Na_2SO_4. The powders of these materials in suitable proportion were dissolved in hydrogen peroxide and heated up to 350 K for the dissociation of peroxide complexes. The obtained gel was deposited onto a metallic substrate and dried in air at room temperature. The produced xerogel...