Se—assisted synthesis of WO <sub/>3?x</sub> nanowires and its intrinsic metallicity

摘要： One dimensional WO3?x nanowires were successfully synthesized by a chemical vapor deposition method under a catalysis effect of non-metal selenium at an atmosphere pressure. The morphology ad structural characteristics were investigated by scanning electron microscopy (SEM), atom force microscopy (AFM), and transmission electron microscopy (TEM). Furthermore, X-ray photoelectron spectrum analysis con?rms existence of the oxygen vacancies in WO3?x nanowires. Based on the above results, a possible growth mechanism was proposed. The oxygen vacancy induced metallic nature of WO3?x nanowires was also con?rmed by the single-nanowire electrical measurements.