Title
An Ultra-Sensitive Multi-Functional Optical Micro/Nanofiber Based on Stretchable Encapsulation
Abstract
Stretchable optical fiber sensors (SOFSs), which are promising and ultra-sensitive next-generation sensors, have achieved prominent success in applications including health monitoring, robotics, and biological-electronic interfaces. Here, we report an ultra-sensitive multi-functional optical micro/nanofiber embedded with a flexible polydimethylsiloxane (PDMS) membrane, which is compatible with wearable optical sensors. Based on the effect of a strong evanescent field, the as-fabricated SOFS is highly sensitive to strain, achieving high sensitivity with a peak gauge factor of 450. In addition, considering the large negative thermo-optic coefficient of PDMS, temperature measurements in the range of 30 to 60 & DEG;C were realized, resulting in a 0.02 dBm/& DEG;C response. In addition, wide-range detection of humidity was demonstrated by a peak sensitivity of 0.5 dB/% RH, with less than 10% variation at each humidity stage. The robust sensing performance, together with the flexibility, enables the real-time monitoring of pulse, body temperature, and respiration. This as-fabricated SOFS provides significant potential for the practical application of wearable healthcare sensors.
Year
DOI
Venue
2021
10.3390/s21227437
SENSORS
Keywords
DocType
Volume
optical micro/nanofiber, multi-functional, flexible encapsulation, wearable health-care sensor
Journal
21
Issue
ISSN
Citations 
22
1424-8220
0
PageRank 
References 
Authors
0.34
0
7
Name
Order
Citations
PageRank
Siheng Xiang100.34
Hui You200.34
Xinxiang Miao300.34
Longfei Niu400.34
Caizhen Yao500.34
Yilan Jiang600.34
Guorui Zhou700.34