Comparison of Different Aspect Ratios on Piezoelectric Potential of ZnO, BaTiO₃, and PZT-4 Nanorods for the Development of Tactile Sensor

The present study explores the effect of aspect ratios on the piezoelectric potential strength of three different materials. Three different piezoelectric materials, including zinc oxide (ZnO), barium titanate (BaTiO3), and standard lead zirconate titanate (PZT-4), have been discussed in the simulation. Among these materials, the ZnO nanorod is receiving a significant attention due to its promising piezoelectric performance and biocompatibility. The simulation results show that the ZnO nanorods exhibit greater piezoelectric potential among these three materials due to the lower dielectric constant. This result is in contrast to the fact that the highest piezoelectric coefficient (d33) belongs to PZT and the lowest d33 value for ZnO. Further, the simulation study explores the effect of applied pressure on nanorods and the aspect ratio of the nanorods on their piezoelectric performance. These simulation results can be used and optimized for sensitivity and performance in the design of pressure tactile, haptic, and robotics applications.