All-nanofiber–based, ultrasensitive, gas-permeable mechanoacoustic sensors for continuous long-term heart monitoring

作者：Md Osman Goni Nayeem, Sunghoon Lee, Hanbit Jin, Naoji Matsuhisa, Hiroaki Jinno, Akihito Miyamoto, Tomoyuki Yokota, Takao Someya · 发表于：Proceedings of the National Academy of Sciences · 年份：2020 · DOI：10.1073/pnas.1920911117 · 被引用次数：191 · 研究领域：Advanced Sensor and Energy Harvesting Materials、Gas Sensing Nanomaterials and Sensors、Advanced Chemical Sensor Technologies

in the low-frequency region (<500 Hz). The high sensitivity is achieved by the use of durable and ultrathin (2.5 µm) nanofiber electrode layers enabling a large vibration of the sensor during the application of sound waves. The sensor is ultralightweight, and the overall weight is as small as 5 mg or less. The devices are mechanically robust against bending, and show no degradation in performance even after 1,000-cycle bending. Finally, we demonstrate a continuous long-term (10 h) measurement of heart signals with a signal-to-noise ratio as high as 40.9 decibels (dB).