Cavity-Free Triboelectric Ultrasonic Sensor

Detection Limit Cut 100×

Removing the cavity structure enables adaptation to higher-order membrane vibrations across a wide ultrasonic range, achieving ultralow detection limits and high frequency resolution.

Huang, Yanqin · Yu, Hao · Zilin, Xiao · Qin, Mengjie · Mulvihill, D. M. · Zhang, Yan · Yicheng, Wang · Wen, Jian · Qingshen, Jing · Cheng, Yonghong

Nano Energy 2025

Specifications

detection limit reduced

{'zh': '', 'en': '2'} orders

detection limit Pa

{'zh': '37.1', 'en': '20'} kHz

频率分辨率

{'zh': '0.001', 'en': ''} kHz

最高工作频率

{'zh': '25', 'en': ''} MHz

Advantages

Operational stability 100 million cycles over 20 days