writer：Boling Lan, Weili Deng, Yong Ao, Yue Sun, Guo Tian, Tao Yang, Shenglong Wang, Longchao Huang, Tingting Zhou, Peiwen Li, Zihan Wang, Tianpei Xu, Guicen Liu, Jinlong Sun, Hongguang Li, Long Jin, Binbin Zhang, Fengjun Chun, Weiqing Yang
keywords：Hollow-structured，Omnidirectional capture，Piezoelectric polymer，High-performance，Acoustic electronics
source：期刊
Issue time：2026年

Piezoelectric polymer-based acoustic electronics hold great potential for human-machine interaction in intelli gent acoustic systems, owing to their inherent wideband characteristics. However, conventional acoustic elec tronics are often constrained by unidirectional response, poor signal-to-noise ratio (SNR), and low sensitivity. To address these challenges, we propose a controllable, hollow-structured piezoelectric nanofiber that simulta neously optimizes the intrinsic crystallization behavior and acoustic absorption of PVDF. This approach enables the fabrication of a high-performance hollow nanofiber-based acoustic sensor (HAS). The resulting HAS dem onstrates a maximum sensitivity of 418 mV/Pa, a 209% improvement over leading reference sensors, together with a 365% enhancement in SNR (290 ± 4.7 dB) and a 500% increase in frequency resolution (0.1 Hz) compared to state-of-the-art and commercial counterparts. By integrating the HAS into a 3D sphere, we demonstrate omnidirectional, high-performance 3D sound recognition and localization, achieving an angular resolution of 10?. This hollow collaborative regulation technology exhibits a promising pathway for advancing piezoelectric bioelectronics