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Article

A Sprayed Graphene Pattern-Based Flexible Strain Sensor with High Sensitivity and Fast Response

by 1,2, 1,2,*, 1,2, 1,2, 1,2 and 1,2,*
1
Institute of Electronic Engineering, China Academy of Engineering Physics, Mianyang 621900, China
2
Microsystem and Terahertz Research Center, China Academy of Engineering Physics, Chengdu 610200, China
*
Authors to whom correspondence should be addressed.
Sensors 2019, 19(5), 1077; https://doi.org/10.3390/s19051077
Received: 21 December 2018 / Revised: 14 February 2019 / Accepted: 26 February 2019 / Published: 3 March 2019
(This article belongs to the Special Issue Two-Dimensional Materials Based Sensors)
Flexible strain sensors have a wide range of applications in biomedical science, aerospace industry, portable devices, precise manufacturing, etc. However, the manufacturing processes of most flexible strain sensors previously reported have usually required high manufacturing costs and harsh experimental conditions. Besides, research interests are often focused on improving a single attribute parameter while ignoring others. This work aims to propose a simple method of manufacturing flexible graphene-based strain sensors with high sensitivity and fast response. Firstly, oxygen plasma treats the substrate to improve the interfacial interaction between graphene and the substrate, thereby improving device performance. The graphene solution is then sprayed using a soft PET mask to define a pattern for making the sensitive layer. This flexible strain sensor exhibits high sensitivity (gauge factor ~100 at 1% strain), fast response (response time: 400–700 μs), good stability (1000 cycles), and low overshoot (<5%) as well. Those processes used are compatible with a variety of complexly curved substrates and is expected to broaden the application of flexible strain sensors. View Full-Text
Keywords: graphene; flexible strain sensor; high sensitivity; fast response; curved substrate graphene; flexible strain sensor; high sensitivity; fast response; curved substrate
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MDPI and ACS Style

Xu, W.; Yang, T.; Qin, F.; Gong, D.; Du, Y.; Dai, G. A Sprayed Graphene Pattern-Based Flexible Strain Sensor with High Sensitivity and Fast Response. Sensors 2019, 19, 1077. https://doi.org/10.3390/s19051077

AMA Style

Xu W, Yang T, Qin F, Gong D, Du Y, Dai G. A Sprayed Graphene Pattern-Based Flexible Strain Sensor with High Sensitivity and Fast Response. Sensors. 2019; 19(5):1077. https://doi.org/10.3390/s19051077

Chicago/Turabian Style

Xu, Wei, Tingting Yang, Feng Qin, Dongdong Gong, Yijia Du, and Gang Dai. 2019. "A Sprayed Graphene Pattern-Based Flexible Strain Sensor with High Sensitivity and Fast Response" Sensors 19, no. 5: 1077. https://doi.org/10.3390/s19051077

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