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Tungsten oxide (W18O49) nanorods were grown by directly heating tungsten foils covered with potassium bromide (KBr) in low-pressure wet oxygen. The approach featured such advantages as convenient manipulation, low cost and rapid accessibility to high temperatures. A solid-liquid-solid (SLS) mechanism is believed to have dominated the growth process, in which the W18O49 nanorods segregated from eutectic...
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