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Core WO3 nanofibers (140–300 nm in diameter, several hundred µm long) are made by a novel, water‐based electrospinning process using ammonium metatungstate (AMT) and polyvinylpyrrolidone (PVP) as precursors. TiO2 shells (1.5–20 nm) are grown by atomic layer deposition (ALD) using TiCl4 and water at 250°C. The WO3/TiO2 composite fibers are analyzed using X‐ray diffraction (XRD), scanning electron microscopy...
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