Synthesis and optical properties of single-crystalline indium zinc oxide (IZO) nanowires via co-deposition and oxidation methods

In this study, one-dimensional (1D) indium zinc oxide (IZO; Indium oxide with heavy zinc doping of 30 at %) nanowires was synthesized via electrodeposition and an oxidization method with porous anodic alumina membrane (AAM), which had an average diameter of about 60 nm. As FE-SEM results showed the synthesized IZO nanowires had an approximate length of 6-8 μm with a high aspect ratio of about 116. IZO nanowires with an Zn/(In + Zn) atomic ratio of 0.301 (∼0.3) were observed from EDS. XRD and SAED analyses show the synthesized nanowires were of single-crystal cubic structure. The UV/Visible/NIR absorption of the IZO nanowires showed an absorption peak of around 330 nm with a direct band gap energy (Eg) of 3.5 eV.