A Fully Integrated and Self-Powered Smartwatch for Continuous Sweat Glucose Monitoring
- Univ. of California, Berkeley, CA (United States). Dept. of Electrical Engineering and Computer Sciences and Berkeley Sensor and Actuator Center; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Materials Sciences Division; Sichuan Univ., Chengdu (China). Polymer Research Inst., State Key Lab. of Polymer Materials
- Univ. of California, Berkeley, CA (United States). Dept. of Electrical Engineering and Computer Sciences and Berkeley Sensor and Actuator Center; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Materials Sciences Division; Hong Kong Univ. of Science and Technology, Hong Kong (China). Dept. of Electronic and Computer Engineering
- Univ. of California, Berkeley, CA (United States). Dept. of Electrical Engineering and Computer Sciences
- Univ. of California, Berkeley, CA (United States). Dept. of Electrical Engineering and Computer Sciences and Berkeley Sensor and Actuator Center; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Materials Sciences Division
- Hong Kong Univ. of Science and Technology, Hong Kong (China). Dept. of Electronic and Computer Engineering
Wearable devices for health monitoring and fitness management have foreseen a rapidly expanding market, especially those for noninvasive and continuous measurements with real-time display that provide practical convenience and eliminated safety/infection risks. In this research, a self-powered and fully integrated smartwatch that consists of flexible photovoltaic cells and rechargeable batteries in the forms of a “watch strap”, electrochemical glucose sensors, customized circuits, and display units integrated into a “dial” platform is successfully fabricated for real-time and continuous monitoring of sweat glucose levels. The functionality of the smartwatch, including sweat glucose sensing, signal processing, and display, can be supported with the harvested/converted solar energy without external charging devices. The Zn-MnO2 batteries serve as intermediate energy storage units and the utilization of aqueous electrolytes eliminated safety concerns for batteries, which is critical for wearable devices. Such a wearable system in a smartwatch fashion realizes integration of energy modules with self-powered capability, electrochemical sensors for noninvasive glucose monitoring, and in situ and real-time signal processing/display in a single platform for the first time. The as-fabricated fully integrated and self-powered smartwatch also provides a promising protocol for statistical study and clinical investigation to reveal correlations between sweat compositions and human body dynamics.
- Research Organization:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division; National Science Foundation (NSF)
- Grant/Contract Number:
- AC02-05CH11231
- OSTI ID:
- 1638991
- Journal Information:
- ACS Sensors, Vol. 4, Issue 7; ISSN 2379-3694
- Publisher:
- American Chemical Society (ACS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
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Review—Energy Autonomous Wearable Sensors for Smart Healthcare: A Review
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journal | December 2019 |
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