Journal
ADVANCED FUNCTIONAL MATERIALS
Volume 26, Issue 9, Pages 1322-1329Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.201504717
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Funding
- National Natural Science Foundation of China [51402060, 51372133, 21322302]
- Beijing Science and Technology Program [D141100000514001]
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDB02050008]
- Department of Engineering Science and Mechanics, College of Engineering, and Materials Research Institute at The Pennsylvania State University
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Promoted by the demand for wearable devices, graphene has been proved to be a promising material for potential applications in flexible and highly sensitive strain sensors. However, low sensitivity and complex processing of graphene retard the development toward the practical applications. Here, an environment-friendly and cost-effective method to fabricate large-area ultrathin graphene films is proposed for highly sensitive flexible strain sensor. The assembled graphene films are derived rapidly at the liquid/air interface by Marangoni effect and the area can be scaled up. These graphene-based strain sensors exhibit extremely high sensitivity with gauge factor of 1037 at 2% strain, which represents the highest value for graphene platelets at this small deformation so far. This simple fabrication for strain sensors with highly sensitive performance of strain sensor makes it a novel approach to applications in electronic skin, wearable sensors, and health monitoring platforms.
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