Récupération d'énergie Modeling Composites Attractiveness of education Transducers Piezocomposite Nanowires Nanofils Modélisation Finite element method Gallium nitride Piézoélectricité Piezoelectric materials Domain walls Thin films Atomic force microscopy Piezoelectricity Electrochemical etching Light diffraction Dielectric Chemical vapor deposition Disperse systems Phase transitions Pulsed laser deposition Crystallography Ultrasound Electronic structure Perovskite Diffraction optics Porosity Nanoparticles Spark plasma sintering Simulation Dielectric properties Acoustics Micromachining Nanogenerators Microstructure Silicon ZnO Crystal structure Zinc oxide MEMS High pressure X-ray diffraction Characterization Hyperbolic law Electrical properties Energy harvesting ZnO nanowires Crystal growth Condensed matter properties Microwave frequency Thin film growth Numerical modeling Electrical resistivity Capacitance COVID-19 Nanogenerator Nanogénérateurs piézoélectriques Individual housing Piezoelectric properties Electrodes Oxides Mesoporous silicon Organic solar cell Porous materials Colossal permittivity Magnetization dynamics Barium titanate Multiferroics Hydrothermal synthesis Ferroelectricity Electron microscopy Porous silicon Domain wall Thermal conductivity Hyperbolic analysis Raman spectroscopy Impedance spectroscopy CCTO Ceramics Etching Piezoelectrics Mechanical properties Perovskites Layered compounds Demand side management Materials Higher education High frequency Elasticity Doping LPCVD Epitaxy CMUT Imaging Piezoelectric Nanowire Ferroelectrics