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Open AccessArticle

Enhanced Stretchable and Sensitive Strain Sensor via Controlled Strain Distribution

1
Fujian Provincial Key Laboratory of Functional Marine Sensing Materials, Center for Advanced Marine Materials and Smart Sensors, Minjiang University, Fuzhou 350108, China
2
Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China
3
Faculty of Clothing and Design, Minjiang University, Fuzhou 350108, China
*
Authors to whom correspondence should be addressed.
Nanomaterials 2020, 10(2), 218; https://doi.org/10.3390/nano10020218
Received: 26 December 2019 / Revised: 21 January 2020 / Accepted: 21 January 2020 / Published: 27 January 2020
(This article belongs to the Section Nanocomposite Materials)
Stretchable and wearable opto-electronics have attracted worldwide attention due to their broad prospects in health monitoring and epidermal applications. Resistive strain sensors, as one of the most typical and important device, have been the subject of great improvements in sensitivity and stretchability. Nevertheless, it is hard to take both sensitivity and stretchability into consideration for practical applications. Herein, we demonstrated a simple strategy to construct a highly sensitive and stretchable graphene-based strain sensor. According to the strain distribution in the simulation result, highly sensitive planar graphene and highly stretchable crumpled graphene (CG) were rationally connected to effectively modulate the sensitivity and stretchability of the device. For the stretching mode, the device showed a gauge factor (GF) of 20.1 with 105% tensile strain. The sensitivity of the device was relatively high in this large working range, and the device could endure a maximum tensile strain of 135% with a GF of 337.8. In addition, in the bending mode, the device could work in outward and inward modes. This work introduced a novel and simple method with which to effectively monitor sensitivity and stretchability at the same time. More importantly, the method could be applied to other material categories to further improve the performance. View Full-Text
Keywords: stretchable; strain sensor; graphene; sensitive; strain distribution stretchable; strain sensor; graphene; sensitive; strain distribution
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MDPI and ACS Style

Chen, H.; Lv, L.; Zhang, J.; Zhang, S.; Xu, P.; Li, C.; Zhang, Z.; Li, Y.; Xu, Y.; Wang, J. Enhanced Stretchable and Sensitive Strain Sensor via Controlled Strain Distribution. Nanomaterials 2020, 10, 218.

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