Publication

Abstract : In an attempt to remove such impediments in the technological revolution of surface acoustics waves (SAW) sensors, the main objective of the current work is to study how wave propagation direction effects the performance of SAW macro- and nano-sensors. In order to investigate the propagation of shear horizontal (SH) and anti-plane SH waves in piezoelectric materials with surface effects, a model has been presented. The wavenumber of surface waves in any direction of the piezoelectric medium is presented using the theoretical forms that are generated. To get the phase velocity equation from the wavenumber expression, we additionally use surface elasticity theory. To account for surface phenomena at the nanoscale, the model includes permittivity, surface elasticity, and piezoelectricity. Two configurations are investigated: a piezoelectric material half-space with a nano-substrate and an orthotropic piezoelectric material layer atop an elastic framework. Frequency equations for both symmetric and anti-symmetric waves are determined analytically. The crucial thickness of the piezoelectric layer, where surface energy greatly affects dispersion properties, is highlighted by numerical results. Analysis of the impact of density and surface elasticity on wave velocity reveals a boundary-like spring force. The objective of this study is to investigate the SH wave transmission behavior in anisotropic, transversely isotropic piezoelectric nanostructures. Summaries of recent theoretical work aid in the construction of more effective surface acoustic wave sensors, and the study findings may be valuable in building SAW devices and piezoelectric sensors.