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TiO_2 nanowire arrays were successfully fabricated by liquid-phase deposition method using porous alumina templates.The obtained TiO_2 nanowires were characterized using Raman spectroscopy,X-ray diffraction(XRD),scanning electron microscopy(SEM),field emission scanning electron microscopy(FESEM),transmission electron microscopy(TEM),and selected area electron diffraction(SAED)analysis.Results of electron microscopic observations indicated that the nanowires were smooth and uniform with a diameter of about 50-80 nm and several micrometers in length.SAED,Raman,and XRD measurements showed that TiO_2 nanowires were single-crystalline with a pure rutile structure after heating at 800 ℃ for 10 h.In this situation,the nanowire constituents grew preferentially along the <001>direction.Furthermore,the formation process and mechanistic study of the TiO_2 nanowire arrays were proposed and discussed in detail.The nanowires are clearly produced by the deposition of TiO_2 particles on the inner wall of the template nanochannels.
TiO 2 nanowire arrays were successfully fabricated by liquid-phase deposition method using porous alumina templates. The obtained TiO 2 nanowires were characterized using Raman spectroscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM), field emission scanning electron microscopy (FESEM) , transmission electron microscopy (TEM), and selected area electron diffraction (SAED) analysis. Results of electron microscopic observations indicating that the nanowires were smooth and uniform with a diameter of about 50-80 nm and several micrometers in length. SAED, Raman, and XRD measurements showed that TiO 2 nanowires were single-crystalline with a pure rutile structure after heating at 800 ℃ for 10 h. In this situation, the nanowire constitue grew grew preferentially along the <001> direction. Future and the formation process and mechanistic study of the TiO 2 nanowire arrays were proposed and discussed in detail. nanowires are clearly produced by the deposition of TiO_2 particles on the inner wa ll of the template nanochannels.