Flexible MXene/Bacterial Cellulose Film Sound Detector Based on Piezoresistive Sensing Mechanism

Flexible pressure sensors have aroused extensive attention in health monitoring, human-computer interaction, soft robotics, and more, as a staple member of wearable electronics. However, a majority of traditional research focuses solely on foundational mechanical sensing tests and ordinary human-motion monitoring, ignoring its other applications in daily life. In this work, a paper-based pressure sensor is prepared by using MXene/bacterial cellulose film with three-dimensional isolation layer structure, and its sensing capability as a wearable sound detector has also been studied. The as-prepared device exhibits great comprehensive mechanical sensing performance as well as accurate detection of human physiological signals. As a sound detector, not only can it recognize different voice signals and sound attributes by monitoring movement of throat muscles, but also it will distinguish a variety of natural sounds through air pressure waves caused by sound transmission (also called sound waves), like the eardrum. Besides, it plays an important role in sound visualization technology because of the ability for capturing and presenting music signals. Moreover, millimeter-scale thickness, lightweight, and degradable raw materials make the sensor convenient and easy to carry, meeting requirements of environmental protection as well.

Automated summary

Flexible pressure sensors have gained significant attention in various fields due to their applications in health monitoring and human-computer interaction. This study presents a paper-based pressure sensor made of MXene/bacterial cellulose film with a three-dimensional isolation layer structure, which also functions as a wearable sound detector. The sensor demonstrates excellent mechanical sensing performance and precise detection of human physiological signals. It can recognize different voice signals and sound attributes by monitoring throat muscle movement, and distinguish various natural sounds through air pressure waves. In addition, it plays a crucial role in sound visualization technology and meets the requirements of environmental protection, as it is lightweight and made of degradable materials.