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

Md Osman Goni Nayeem, Sunghoon Lee, Hanbit Jin, Naoji Matsuhisa, Hiroaki Jinno, Akihito Miyamoto, Tomoyuki Yokota, Takao Someya

研究成果: Article

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The prolonged and continuous monitoring of mechanoacoustic heart signals is essential for the early diagnosis of cardiovascular diseases. These bodily acoustics have low intensity and low frequency, and measuring them continuously for long periods requires ultrasensitive, lightweight, gas-permeable mechanoacoustic sensors. Here, we present an all-nanofiber mechanoacoustic sensor, which exhibits a sensitivity as high as 10,050.6 mV Pa-1 in the lowfrequency 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).

元の言語English
ページ(範囲)7063-7070
ページ数8
ジャーナルProceedings of the National Academy of Sciences of the United States of America
117
発行部数13
DOI
出版物ステータスPublished - 2020 3 31

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