Abstract
TiO2 nanorods were synthesized by annealing the Cu ion-implanted TiO2 nanogranular film in N2 atmosphere at 900 °C for 6 h. The corresponding morphology and optical properties of the samples were investigated. Experimental results revealed that as the higher diffusion rate of Cu, only when the fluence of Cu ion is larger than 1 × 1016 ions/cm2, the significant TiO2 nanorods could be generated on the surface of the sample. In addition, the optical absorption properties of the TiO2 nanorods were also modified as the presence of abundant Ti3+ and Cu2+. The band gap was narrowed distinctly, which can be ascribed to the doping of Cu elements. Further discussions revealed that the Ti ion implantation is not an essential process, but the formation of TiO2 nanorods is closely related to the Cu ion implantation. The intrinsic mechanism was proposed as aggregation, recrystallization, and extension along the fixed crystal orientation of the TiO2 nanostructure induced by copper oxide.
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We acknowledge financial support from the National Natural Science Foundation of China (NOs. 11175129 and 11535008).
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Wang, G., Jing, Y., Dai, H. et al. The influence of Cu ion implantation on the morphology and optical properties of TiO2 nanogranular film. J Mater Sci: Mater Electron 32, 7455–7463 (2021). https://doi.org/10.1007/s10854-021-05458-9
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DOI: https://doi.org/10.1007/s10854-021-05458-9