Journal
ADVANCED OPTICAL MATERIALS
Volume 9, Issue 11, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adom.202002206
Keywords
blood pressure monitoring; optical microfibers; pulse wave detection; self‐ assembled wave structures; stretchable optical sensors
Categories
Funding
- National Natural Science Foundation of China [61925502, 61535005, 62035006, 62005118]
- National Key R&D Program of China [2017YFA0303700, 2017YFC1403803]
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The study introduces a stretchable and ultrathin optical sensor based on a self-assembled wavy microfiber, which exhibits high sensitivity and good repeatability. It successfully detects wrist pulse and monitors blood pressure, showing potential for human health monitoring.
Smart wearable devices have made remarkable success in medical-grade human vital signal monitoring and have promoted the realization of precision medicine and telemedicine. The flexibility and stretchability are significant for wearable devices, which determine the adhesion to the skin and influence the signal accuracy. Here, a stretchable and ultrathin optical sensor based on a self-assembled wavy microfiber is proposed. Thanks to the bottom-up strategy, the wave structure of the microfiber can be adjusted artificially, paving the way for the design of stretchable optical devices. Due to the microbend loss of the microfiber, the optical sensor has a sensitivity of approximate to 257 per unit strain and a good repetition (the standard deviation is 1.7% over 100 cycles). With the great sensor performance, the wrist pulse with a high signal-to-noise ratio is detected and the blood pressure is monitored successfully via the pulse arrival time, showing a potential application for human health monitoring.
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