Simulation of the excitation of mechanical vibrations in carbon nanotube arrays by ponderomotive forces is presented in continual approximation on the basis of electrodynamics of moving bodies, elasticity theory and van der Waals interactions' theory.

The results of finite element method (FEM) simulation of resonant excitation of the vibrations of carbon nanotubes (CNT) and their bundles by microwave electromagnetic fields due to ponderomotive forces are presented and discussed from the viewpoint of nanoradio design.

Results of the strain effect theoretical investigation for YBa2Cu3O7-x thin film based surface acoustic wave (SAW) structures are presented. Third order elastic moduli of YBa2Cu3O7-x polycrystals at room temperature were evaluated and used to calculate the coefficients of SAW phase velocity sensitivity with respect to deformations and rotations both for the YBa2Cu3O7-x polycrystalline substrate and YBa2Cu3O7-x\SrTiO3 laminated structures with various crystallographic orientations of SrTiO3 single crystal substrate and YBa2Cu3O7-x polycrystalline film thicknesses. It has been shown that strain effect values in such structures are determined, above all, by the YBa2Cu3O7-x layer thickness rather than by substrate characteristics and substantially exceed all the literature data on other SAW materials and structures. (C) 1997 Elsevier Science S.A.

A method for calculating the characteristics of surface acoustic wave (SAW) propagation in a deformable piezoelectric multilayer medium is presented. The effect of longitudinal and lateral mechanical strain on the SAW phase velocity in a (ZnO or AIN)/SiO2/Si thin film structure for {001}, {111} and {110} silicon crystal planes within the temperature range 293–673 K is studied. The effects of thickness and internal mechanical stresses in the ZnO or A1N piezoelectric film and SiO2 dielectric film on the sensitivity of the SAW phase velocity to strains in the structure are investigated. The Si{110}-based SAW structure with the SAW wavevector oriented in the 〈110〉 direction is shown to possess maximum operating frequency sensitivity to both longitudinal and lateral strain. The parameters of SAW structure stable to mechanical loads are determined. ZnO and SiO2 layer deposition on silicon is shown to increase the SAW phase velocity sensitivity to longitudinal strain and to decrease its sensitivity to lateral strain in the structure.

The possibility of stabilizing acousto-electronic radio components by means of layered structures based on surface acoustic waves with respect to mechanical loading of a soundguide by varying the soundguide orientation and layer thickness is demonstrated. The parameters of multilayered ZnO(AlN)/SiO2/Si structures, stable to various forms of loading, are presented.