Large‐Area Ultrathin Graphene Films by Single‐Step Marangoni Self‐Assembly for Highly Sensitive Strain Sensing Application |
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| Authors: | Xinming Li Tingting Yang Yao Yang Jia Zhu Li Li Fakhr E Alam Xiao Li Kunlin Wang Huanyu Cheng Cheng‐Te Lin Ying Fang Hongwei Zhu |
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| Affiliation: | 1. National Center for Nanoscience and Technology, Zhongguancun, Beijing, P. R. China;2. State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, P. R. China;3. Center for Nano and Micro Mechanics, Tsinghua University, Beijing, P. R. China;4. Department of Engineering Science and Mechanics, Materials Research Institute, The Pennsylvania State University, PA, USA;5. Key Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, P. R. China;6. CAS Center for Excellence in Brain Science and Intelligence Technology, Shanghai, P.R. China |
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| Abstract: | 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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| Keywords: | high sensitivity large area self‐assembly strain sensors ultrathin graphene films |
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