J Mater Sci Technol ›› 2012, Vol. 28 ›› Issue (5): 385-390.

• Nanomaterials and Nanotechnology •     Next Articles

Synthesis of Single-Crystal TiO2 Nanowire Using Titanium Monoxide Powder by Thermal Evaporation

Z.G. Shang, Z.Q. Liu, P.J. Shang, J.K. Shang   

  1. Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
  • Received:2011-12-16 Revised:2012-02-25 Online:2012-05-30 Published:2012-05-29
  • Contact: Z.Q. Liu
  • Supported by:

    the Hundred Talents Program of the Chinese Academy of Sciences, Shenyang Science and Technology Project (Grant No. F11-264-1-65), the National Basic Research Program of China (Grant No. 2010CB631006), and the Major National Science and Technology Program of China (Grant No. 2011ZX02602).

Abstract: TiO2 nanowires were synthesized successfully in a large quantity by thermal evaporation using titanium monoxide powder as precursor. X-ray diffraction results showed that all the products were pure rutile phase of TiO2. According to microstructural observations, the nanowires have two typical morphologies, a long straight type and a short tortuous type. The straight nanowires were obtained at a wide temperature range of 900−1050 °C, while the tortuous ones were formed below 900 °C. Transmission electron microscopy characterization revealed that both the straight and the tortuous nanowires are single-crystal rutile TiO2. The preferential growth direction of the nanowires was determined as [110] orientation according to electron diffraction and high-resolution image analyses. The morphological change of TiO2 nanowires was discussed by considering the different atomic diffusion rates of Ti atoms caused by the phase transformation in Ti substrate at around 900 °C.

Key words: Rutile-TiO2 , Alloy nanowires , Transmission electron microscopy (TEM) characterization , Crystal structure identification , Growth mechanism , Thermal evaporation