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
Abstract
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).
Topics & Concepts
NanofiberTerm (time)Materials scienceContinuous monitoringNanotechnologyBiomedical engineeringMedicineEngineeringPhysicsOperations managementQuantum mechanicsAdvanced Sensor and Energy Harvesting MaterialsGas Sensing Nanomaterials and SensorsAdvanced Chemical Sensor Technologies