Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 7, Issue 11, Pages 6317-6324Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.5b00695
Keywords
stretchable electronics; strain sensor; graphene; layer-by-layer assembly; human motion monitoring
Funding
- Fundamental R&D Program for Technology of World Premier Materials (WPM) - Ministry of Trade, Industry, and Energy (MOTIE, Korea) [10037689]
- Korea Evaluation Institute of Industrial Technology (KEIT) [10037689, 10037912] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Because of their outstanding electrical and mechanical properties, graphene strain sensors have attracted extensive attention for electronic applications in virtual reality, robotics, medical diagnostics, and healthcare. Although several strain sensors based on graphene have been reported, the stretchability and sensitivity of these sensors remain limited, and also there is a pressing need to develop a practical fabrication process. This paper reports the fabrication and characterization of new types of graphene strain sensors based on stretchable yarns. Highly stretchable, sensitive, and wearable sensors are realized by a layer-by-layer assembly method that is simple, low-cost, scalable, and solution-processable. Because of the yarn structures, these sensors exhibit high stretchability (up to 150%) and versatility, and can detect both large- and small-scale human motions. For this study, wearable electronics are fabricated with implanted sensors that can monitor diverse human motions, including joint movement, phonation, swallowing, and breathing.
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