MoS2-Decorated Laser-Induced Graphene for a Highly Sensitive, Hysteresis-free, and Reliable Piezoresistive Strain Sensor

被引:133
|
作者
Chhetry, Ashok [1 ]
Sharifuzzaman, Md [1 ]
Yoon, Hyosang [1 ]
Sharma, Sudeep [1 ]
Xuan, Xing [1 ]
Park, Jae Yeong [1 ]
机构
[1] Kwangwoon Univ, Dept Elect Engn, 447-1 Wolgye Dong, Seoul 01897, South Korea
关键词
MoS2-decorated laser-induced graphene (MDS-LIG); piezoresistive strain sensor; laser irradiation; crack propagation; subtle strain; HIGH-PERFORMANCE; HUMAN HEALTH; TRANSPARENT; OXIDE; MOS2; COMPOSITES;
D O I
10.1021/acsami.9b04915
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Advancement of sensing systems, soft robotics, and point-of-care testing requires the development of highly efficient, scalable, and cost-effective physical sensors with competitive and attractive features such as high sensitivity, reliability, and preferably reversible sensing behaviors. This study reports a highly sensitive and reliable piezoresistive strain sensor fabricated by one-step carbonization of the MoS2-coated polyimide film to obtain MoS2-decorated laser-induced graphene. The resulting three-dimensional porous graphene nanoflakes decorated with MoS2 exhibit stable electrical properties yielding a reliable output for longer strain/release cycles. The sensor demonstrates high sensitivity (i.e., gauge factor, GF approximate to 1242), is hysteresis-free (similar to 2.75%), and has a wide working range (up to 37.5%), ultralow detection limit (0.025%), fast relaxation time (similar to 0.17 s), and a highly stable and reproducible response over multiple test cycles (>12 000) with excellent switching response. Owing to the outstanding performances of the sensor, it is possible to successfully detect various subtle movements ranging from phonation, eye-blinking, and wrist pulse to large human-motion-induced deformations.
引用
收藏
页码:22531 / 22542
页数:12
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