Optical, dielectric and microscopic observation of different phases TiO2 metal host nanowires

We successfully obtained TiO2 nanowires (NWs)/nanocabbages (NCs) from different phases of bulk metal and anatase titanium powder, respectively. In this fabrication procedure, we prepared TiO2 nanowires from anatase titanium those have very low diameters of the order of 1.5 nm with high yield. Those agglomerated nanowires turned to nanocabbages shaped structures with diameter of 42 nm after annealed at high temperature having TiO2 anatase crystallinity. Again, synthesized nanowires from bulk metal titanium have its large order diameters of the order of 11 nm and after annealed its length reduces to 120 nm with very short size nanowires of anatase with rutile crystalline impurity formed. Comparative study revealed that high crystalline hydrothermally synthesized TiO2 nanowires can only be obtained using bulk anatase (IV) titanium best reported than usual ordinary metal titanium. Interestingly the optical, dielectric properties of such nanowires changed drastically due to changes of their structural property owing to different phases of titanium powder introduced in this synthesis technique.

► Synthesis of metal and anatase phases titanate nanowires through simple hydrothermal route.
► High quality nanowires were obtained from bulk anatase titanium powder.
► After annealed it over 650 °C for 1 hr it turned into nanocabbages structure.
► The optical and dielectric behavior were drastically changed for those nanowires.