Wave-Shaped Piezoelectric Nanofiber Membrane Nanogenerator for Acoustic Detection and Recognition

Fan Xu; Jiang Yang; Ruizhi Dong; Hanxiao Jiang; Conghuan Wang; Weilin Liu; Zaixiu Jiang; Xiaoqing Zhang; Guodong Zhu

doi:10.1007/s42765-021-00095-7

Advanced Fiber Materials ›› 2021, Vol. 3 ›› Issue (6) : 368 -380. DOI: 10.1007/s42765-021-00095-7

Research Article

Wave-Shaped Piezoelectric Nanofiber Membrane Nanogenerator for Acoustic Detection and Recognition

Author information +

¹Department of Materials Science, Fudan University, 200433, Shanghai, China

²Institute of Acoustics, School of Physics Science and Engineering, Tongji University, 200092, Shanghai, China

³Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology, School of Physics Science and Engineering, Tongji University, 200092, Shanghai, China

^g zxjiang@tongji.edu.cn

^h x.zhang@tongji.edu.cn

^j gdzhu@fudan.edu.cn

Fan Xu

received his M.S. degree from JiangSu University of Science and Technology (2017) and Ph.D. degree from Fudan University (2021), respectively. His main research interest includes piezoelectric sensing and energy harvesting.

Zaixiu Jiang

received his Ph.D. degree from Tongji University in 2006 and then joined the faculty of Tongji University as lecturer. His research interests include noise simulation, noise control and novel acoustic materials.

Xiaoqing Zhang

received her Ph.D. degree in Condensed Matter Physics from Tongji University, China in 2001. From April 2001 to December 2004, she was as a postdoctoral fellow, working on the dielectric properties of the inorganic dielectric materials and the piezoelectric properties of the polymer films, at Darmstadt University of Technology, Germany. She has been a full professor and the leader of the research group of Electrets and Functional Dielectrics at Tongji University since December 2010. Her interests are electro-active materials and their applications. She has over 100 scientific publications and holds 16 patents. She is a co-editor of the European Journal of Electrical Engineering (EJEE), a member of the academic committees of the IEEE International Conference on Electrets, the International Conference on Vibration and Energy Harvesting Applications, and Chinese National Conference on Electrets. She is a senior IEEE member.

Guodong Zhu

received his B.S. (2000) and Ph.D. (2005) degrees in condensed matter physics from Tongji University, China. He joined the department of Materials Science in Fudan University in 2005 and was promoted associate professor in 2007. He was a visiting scholar of the Electrical Engineering Department at UCLA during 2011. After that he has been a full professor with Fudan University. His research interest focuses on flexible electronic materials and devices. Since 2016 Zhu has been member of academic committee of the Chinese National Conference on Electrets.

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Abstract

With the rapid development of internet of things and wearable electronics, how to conveniently power uncountable sensors remains a huge challenge. Energy harvesting strategy is suggested to collect and convert environmental energies into electrical energy. Thereinto, piezoelectric polymers are utilized as flexible harvesters to convert mechanical energy. The latter widely distributes in both our daily life and industrial environment. Intrinsic piezoelectric property further drives piezoelectric polymers to construct flexible self-powered strain sensors. However, relatively low piezoelectric performance restricts their application in detection and conversion of weak mechanical excitations. Herein, wave-shaped 3D piezoelectric device was fabricated by embossing electrospun polyvinylidene fluoride nanofibers. This 3D structured device presents better longitudinal and transverse piezoelectric performance than usual flat-type one. This wave-shaped piezoelectric device was developed for acoustic detection and recognition with a frequency resolution better than 0.1 Hz. This wave-shaped device was capable of frequency spectrum analyses of various sound sources from human and animals and well presents its potential for future wearable acoustic sensors and transducers.

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Fan Xu, Jiang Yang, Ruizhi Dong, Hanxiao Jiang, Conghuan Wang, Weilin Liu, Zaixiu Jiang, Xiaoqing Zhang, Guodong Zhu. Wave-Shaped Piezoelectric Nanofiber Membrane Nanogenerator for Acoustic Detection and Recognition. Advanced Fiber Materials, 2021, 3(6): 368-380 DOI:10.1007/s42765-021-00095-7