| 초록 |
One-Dimensional (1D) piezoelectric nanostructures have been consistently focused due to their fascinating and prominent electrical characteristics. Although the 1D nanostructures have been attracted distinctly, it is hard to grow vertical and well-aligned nanoarrays on substrate for high piezoelectric power density (an induced voltage per unit area). In this study, we have synthesized vertically aligned nanorod-arrays of BaTiO3, which is an extensively used lead-free piezoelectric material due to its harmlessness and high dielectric permittivity. BaTiO3 nanorod-arrays were prepared by topochemical transformation of TiO2 under hydrothermal conditions. Before the BaTiO3 transformation, V-shape TiO2 nanostructures were formed by chemical etching with variations of reaction condition. Piezoelectricities of V-shape BaTiO3 nanostructures were found to exhibit non aggregation with dense structures as well as high piezoelectric responses, which is comparable to typical BaTiO3 nanorods. The result describes that V-shape piezoelectric nanostructures can provide more effective electrical voltage under applying shear stress. |
