title: Highly Stretchable and Sensitive Strain Sensor Based on Facilely Prepared Three-Dimensional Graphene Foam Composite.
abstract: Wearable strain sensors with excellent stretchability and sensitivity have emerged as a very promising field which could be used for human motion detection and biomechanical systems, etc. Three-dimensional (3D) graphene foam (GF) has been reported before for high-performance strain sensors, however, some problems such as high cost preparation, low sensitivity, and stretchability still remain. In this paper, we report a highly stretchable and sensitive strain sensor based on 3D GF and polydimethylsiloxane (PDMS) composite. The GF is prepared by assembly process from graphene oxide via a facile and scalable method and possesses excellent mechanical property which facilitates the infiltration of PDMS prepolymer into the graphene framework. The as-prepared strain sensor can be stretched as high as 30% of its original length and the gauge factor of this sensor is as high as 98.66 under 5% of applied strain. Moreover, the strain sensor shows long-term stability in 200 cycles of stretching-relaxing. Implementation of the device for monitoring the bending of elbow and finger results in reproducibility and various responses in the form of resistance change. Thus, the developed strain sensors exhibit great application potential in fields of biomechanical systems and human-interactive applications.
authors.affiliation: Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences , Shenzhen 518055, China.|Shenzhen College of Advanced Technology, University of Chinese Academy of Sciences , Shenzhen 518055, China.
authors.forename: Jinhui
authors.initials: J
authors.lastname: Li
authors.affiliation: School of Material Science and Engineering, University of Jinan , Jinan 250022, China.
authors.forename: Songfang
authors.initials: S
authors.lastname: Zhao
authors.affiliation: Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences , Shenzhen 518055, China.|Shenzhen College of Advanced Technology, University of Chinese Academy of Sciences , Shenzhen 518055, China.
authors.forename: Xiaoliang
authors.initials: X
authors.lastname: Zeng
authors.affiliation: Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences , Shenzhen 518055, China.
authors.forename: Wangping
authors.initials: W
authors.lastname: Huang
authors.affiliation: Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences , Shenzhen 518055, China.|Shenzhen College of Advanced Technology, University of Chinese Academy of Sciences , Shenzhen 518055, China.
authors.forename: Zhengyu
authors.initials: Z
authors.lastname: Gong
authors.affiliation: Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences , Shenzhen 518055, China.|Department of Electronic Engineering, Faculty of Engineering, The Chinese University of Hong Kong , Hong Kong 999077, China.
authors.forename: Guoping
authors.initials: G
authors.lastname: Zhang
authors.affiliation: Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences , Shenzhen 518055, China.
authors.forename: Rong
authors.initials: R
authors.lastname: Sun
authors.affiliation: School of Materials Science and Engineering, Georgia Institute of Technology , Atlanta, Georgia 30332, United States.|Department of Electronic Engineering, Faculty of Engineering, The Chinese University of Hong Kong , Hong Kong 999077, China.
authors.forename: Ching-Ping
authors.initials: CP
authors.lastname: Wong
keywords: assembly; biomechanical systems; graphene foam; sensitivity; strain sensor; stretchability