Development of vibration powered devices using a liquid electret,  Researchers have developed a liquid electret material that can withstand electricity.

They then combined this material with soft electrodes to create the world’s first bending and stretching device with vibration. Because this device is very deformed and can convert very subtle vibrations into electrical signals, this device can be used for the development of health devices such as standalone pulses and pulse sensors.

Electret material that is able to withstand an electric charge permanently can produce a voltage if the distance to changes in the connected electrode. Because of these properties, electrical materials can be suitable for the development of devices and vibration sensors (piezoelectric), which can convert vibrations and external pressure into electrical signals.

However, conventional electrical materials are solid or sheet-like and, as such, are flexible and cannot be deformed to become complex, making them unsuitable for the development of portable pulses and pulse sensors. Therefore, there is great interest in developing rotating-driven rotating and spreading devices that can be processed in various forms and used as sensors.

The liquid material is then immersed in stretchable textiles and then the soaked textile is pressed against soft polyurethane electrodes, which are integrated with silver fiber as a binder.

When the surface of the device is pressed with a finger, it produces a voltage in the range of ± 100-200 mV and works continuously for at least 1.5 months.

In subsequent studies, the group hopes to use this device in a healthy manner by increasing the ability of liquid electret materials to store static electricity and make changes to the processing techniques applied to the device.

The group will also track the potential use of this vibrator as a power source for IoT devices and combine it with a voltage conversion system and capacitors and more.