Structural analysis of truncated pyramids for flexoelectric sensing

In the present study, a truncated pyramid structure was adopted to analyze the effect of the configuration of structures on the flexoelectric effect. In order to use the flexoelectric effect as sensing mechanism, the flexoelectric material, barium strontium titanate (Ba0.65Sr0.35TiO3 - BST) ceramic, which has been known to have the highest flexoelectricity at room temperature until now, was used for the analysis. The flexoelectric output is influenced by not only the dimensions of the structure but also the edge processing. Depending on the shape and amount of edge style, the difference in charge output between the designed and actual fabricated can exist up to 51 %. The results can offer a guide for designing flexoelectric sensors in micro and nano scales.