Molecular Ferroelectrics for Highly Sensitive Detection Toward Low‐Frequency Sound Recognition
Abstract
Abstract Human hearing cannot sensitively detect sounds below 100 Hz, which can affect the physical well‐being and lead to dizziness, headaches, and nausea. Piezoelectric acoustic sensors still lack sensitivity to low‐frequency sounds owing to the low piezoelectric coefficient or high elastic modulus of materials. The low elastic modulus and substantial piezoelectric coefficient of molecular ferroelectric materials make them excellent candidates for acoustic sensors. In this study, the molecular ferroelectric, [(CH 3 ) 3 NCH 2 Cl]CdCl 3 , is used as a piezoelectric active layer in the construction of a piezoelectric acoustic sensor for low‐frequency sound detection. The sensor exhibits high sensitivity (47.43 mV Pa −1 cm −2 ) at 87 Hz, with an excellent level of frequency resolution (up to 0.1 Hz). This facilitates the accurate discrimination and detection of low‐frequency sounds, which is suitable for noise detection applications. The sensor differentiates between various musical instruments and heartbeats, and recognizes audio signals. This study highlights the potential of molecular ferroelectric materials in piezoelectric acoustic device applications, including noise detection, health monitoring, and human‐computer interactions.
Article Details
Authors (18)
Ruonan Wang
State Key Laboratory of Common Mechanism Research for Major Diseases, Department of Biophysics and Structural Biology
Lutao Li
School of Energy, School of Optoelectronic Science and Engineering, School of Physical Science and Technology
Jiating Li
School of Energy School of Optoelectronic Science and Engineering School of Biology and Basic Medical Sciences School of Physical Science and Technology Soochow University Suzhou 215000 P. R. China
Chen Wang
Shan Cong
School of Energy, School of Optoelectronic Science and Engineering, State Key Laboratory of Bioinspired Interfacial Materials Science, Institute of Functional Nano and Soft Materials Laboratory
Guoxiang Zhao
State Key Laboratory of Structural Chemistry
Xinyu Du
Chao‐Ran Huang
School of Energy School of Optoelectronic Science and Engineering School of Biology and Basic Medical Sciences School of Physical Science and Technology Soochow University Suzhou 215000 P. R. China
Hengyu Cao
School of Energy, School of Optoelectronic Science and Engineering, School of Physical Science and Technology
Weiyu Cheng
School of Energy, School of Optoelectronic Science and Engineering, State Key Laboratory of Bioinspired Interfacial Materials Science, Institute of Functional Nano and Soft Materials Laboratory
Yaqi Ye
Chengyuan Liu
National Synchrotron Radiation Laboratory
Bin Li
Wei‐Qiang Liao
Ordered Matter Science Research Center Nanchang University Nanchang P. R. China
Zheng Lu
Rujun Tang
Ren‐Gen Xiong
Ordered Matter Science Research Center Nanchang University Nanchang P. R. China
Guifu Zou
School of Energy, School of Optoelectronic Science and Engineering, School of Physical Science and Technology