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Researchers print high-performance microcone-array flexible piezoelectric acoustic sensor

Researchers print high-performance microcone-array flexible piezoelectric acoustic sensor
The flexible piezoelectric acoustic sensor (FPAS) with cone arrays mimicking outer ear hair cells . Credit: Xiang Zhongyuan

According to the data of the World Health Organization, about 430 million people worldwide suffer from hearing loss due to cochlear damage, and the improvement of hearing mainly depends on cochlear implants. However, traditional cochlear implants have low speech recognition ability, and the mismatch between rigid electrodes and soft tissues may lead to nerve damage and tinnitus.

With the development of Internet of Things (IoT) and , the research of flexible self-powered has attracted extensive attention.

In a study published in Matter, Prof. Song Yanlin and Assoc. Prof. Li Lihong from the Institute of Chemistry of the Chinese Academy of Sciences (ICCAS), inspired by human outer ear hair cells, developed a novel strategy of a highly efficient and flexible piezoelectric acoustic sensor (FPAS) with microcone patterning arrays based on multicomponent lead-free perovskite rod niobate piezoelectric materials with the morphotropic phase boundary.

The output voltage of the rod-based FPAS is nearly 300% of that of the isotropic particles. The microcone patterning FPAS with stable performance in shows high sensitivity due to the significant enhancement of sound energy absorption and can record sound signals, recognize audio signals and realize human-computer interaction.

This work demonstrates that the FPAS holds promise for various applications, such as the IoT, cochlea implants, wearable acoustic equipment, and human-computer interaction.

More information: Zhongyuan Xiang et al, High-performance microcone-array flexible piezoelectric acoustic sensor based on multicomponent lead-free perovskite rods, Matter (2022). DOI: 10.1016/j.matt.2022.11.023

Journal information: Matter

Citation: Researchers print high-performance microcone-array flexible piezoelectric acoustic sensor (2023, March 7) retrieved 5 June 2023 from https://phys.org/news/2023-03-high-performance-microcone-array-flexible-piezoelectric-acoustic.html
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