光纤
材料科学
可穿戴计算机
可穿戴技术
光电子学
光纤传感器
信号(编程语言)
纤维
计算机科学
生物医学工程
光学
电信
复合材料
嵌入式系统
物理
医学
程序设计语言
作者
Zhihui Zhang,Kerui Li,Yaogang Li,Qinghong Zhang,Hongzhi Wang,Chengyi Hou
出处
期刊:ACS Sensors
[American Chemical Society]
日期:2024-06-18
卷期号:9 (6): 3413-3422
标识
DOI:10.1021/acssensors.4c00780
摘要
In recent years, wearable devices have been widely used for human health monitoring. Such monitoring predominantly relies on the principles of optics and electronics. However, electronic detection is susceptible to electromagnetic interference, and traditional optical fiber detection is limited in functionality and unable to simultaneously detect both physical and chemical signals. Hence, a wearable, embedded asymmetric color-blocked optical fiber sensor based on a hydrogel has been developed. Its sensing principle is grounded in the total internal reflection within the optical fiber. The method for posture sensing involves changes in the light path due to fiber bending with color blocks providing wavelength-selective modulation by absorption changes. Sweat pH sensing is facilitated by variations in fluorescence intensity triggered by sweat-induced conformational changes in Rhodamine B. With just one fiber, it achieves both physical and chemical signal detection. Fabricated using a molding technique, this fiber boasts excellent biocompatibility and can accurately discern single and multiple bending points, with a recognition range of 0–90° for a single segment, a detection limit of 0.02 mm–1 and a sweat pH sensing linear regression R2 of 0.993, alongside great light propagation properties (−0.6 dB·cm–1). With its extensive capabilities, it holds promise for applications in medical monitoring.
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