A group of physicists from MIPT has studied how piezoelectrics interact with gap electroacoustic waves. The results of the study can be used in the development of special sensors for detecting microorganisms and viruses, as well as for measuring the properties of materials.
Piezoelectrics are materials that change their shape under the influence of electric current or generate electricity under mechanical stress. They are widely used in everyday life and industry to create generators, motors, sensors, and devices that convert electrical and sound vibrations into energy.
Gap electroacoustic waves combine the properties of sound and electricity. They are used in highly sensitive sensors to detect changes in the environment, as well as in acoustic microscopy.
The study showed that the amplification and attenuation of waves in piezoelectric materials differ significantly when interacting with gap electroacoustic waves.
Scientists have found that even with an imperfect balance, structures made of barium titanate or an analogue of the natural mineral fresnoite can have a narrow resonant peak. This makes them suitable for creating ultra-sensitive sensors.
Our results open up new avenues of research. For example, experimental verification of theoretical predictions, optimization of the structure to achieve maximum sensor sensitivity, and the development of new types of sensors.
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