Reduced graphene oxide-coated carbonized cotton fabric wearable strain sensors with ultralow detection limit
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Reduced graphene oxide-coated carbonized cotton fabric wearable strain sensors with ultralow detection limit QingQing Liu1,2, Yue Zhang1,2, Ang Li1,2, Erhui Ren1,2, Ce Cui1,2, Mi Zhou1,2, Ronghui Guo1,2,* , Hongyan Xiao1,2,*, Shouxiang Jiang3, and Wenfeng Qin4
1
College of Biomass Science and Engineering, Sichuan University, Chengdu 610065, China National Engineering Laboratory Clean Technology Leather Manufacture, Sichuan University, Chengdu 610065, China 3 Institute of Textiles and Clothing, The Hong Kong Polytechnic University, Kowloon, Hong Kong, China 4 Aviation Engineering Institute, Civil Aviation Flight University of China, Guanghan, China 2
Received: 31 March 2020
ABSTRACT
Accepted: 17 August 2020
The booming prosperity of strain sensors promotes the regeneration of wearable electronics. However, strain sensors featured with both large workable range and superb sensitivity are still less than satisfaction. Softness and practicality are also of vital importance for wearable electronics. In this work, a flexible wearable strain sensor based on carbonized cotton fabric coated with reduced graphene oxide (rGO) through polydopamine (rGO/PDA/CCF) modification was fabricated, which exhibits fascinating electrical mechanical performance including a large workable range and superb sensitivity. rGO/PDA/CCF was characterized using scanning electron microscopy (SEM), Raman scattering spectroscopy, and X-ray diffraction (XRD) patterns. The electromechanical performance of the rGO/PDA/CCF strain sensor was evaluated. The strain sensors of rGO/PDA/CCF exhibit a large workable strain range (0–120%) and superb sensitivity with strong durability over 800 cycles. The rGO/PDA/CCF strain sensor has a low detection limit down to 0.01% with a good gauge factor (GF) of 132 within the strain range of 0–1%, and also displays fantastic property in terms of sensitivity in other workable range (GF of 26 and 8 within in a strain range of 1–30% and 30–60%, respectively). rGO/PDA/CCF strain sensor was then applied to track the signal of human motions in real time. rGO/PDA/CCF flexible strain sensor can be utilized in detecting almost all human motions with various dimensions. Additionally, the hydrophobicity and the stability at different temperatures endow the rGO/PDA/CCF strain sensor with high efficiency in various usage, which shows its potential for application in health monitor and wearable electronics.
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Springer Science+Business
Media, LLC, part of Springer Nature 2020
Address correspondence to E-mail: [email protected]; [email protected]
https://doi.org/10.1007/s10854-020-04278-7
J Mater Sci: Mater Electron
1 Introduction Flexible and wearable electronics have aroused exponential expectations due to their flexibility and multifunction, undoubtedly setting the foundation of future electronics. Flexible strain sensors, as an indispensable part of wearable electronics, take on a significant potential application in the health monitoring systems and motion detection [1–4]. In recent years, flexible strain sens
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