Pursuing ultrasensitivity of pressure sensors has been a long-standing goal. Here, we report a piezoelectric sensor that exhibits supreme pressure-sensing performance, including a peak sensitivity up to 3.5*10^6 kPa^-1 in the pressure range of 1-100 mPa and a detection limit of less than 1 mPa, superior to the current state-of-the-art pressure sensors. These properties are attributed to the high percentage of periodic atom vacancies in the two-dimensional Na2Cl crystals formed within multilayered graphene oxide membrane in the sensor, which provides giant polarization with high stability. The sensor can even clearly detect the airflow fluctuations surrounding a flapping butterfly, which have long been the elusive tiny signals in the famous "butterfly effect". The finding represents a step towards next-generation pressure sensors for various precision applications.
@article{arxiv.2401.07315,
title = {Ultrasensitive piezoelectric sensor based on two-dimensional Na2Cl crystals with periodic atom vacancies},
author = {Tao Wang and Yan Fan and Jie Jiang and Yangyang Zhang and Yingying Huang and Liuyuan Zhu and Haifei Zhan and Chunli Zhang and Bingquan Peng and Zhen Gu and Qiubo Pan and Junjie Wu and Junlang Chen and Pei Li and Lei Zhang and Liang Chen and Chaofeng Lü and Haiping Fang},
journal= {arXiv preprint arXiv:2401.07315},
year = {2024}
}