• 文献标题:   MoS2-Decorated Laser-Induced Graphene for a Highly Sensitive, Hysteresis-free, and Reliable Piezoresistive Strain Sensor
  • 文献类型:   Article
  • 作  者:   CHHETRY A, SHARIFUZZAMAN M, YOON H, SHARMA S, XUAN X, PARK JY
  • 作者关键词:   mos2decorated laserinduced graphene mdslig, piezoresistive strain sensor, laser irradiation, crack propagation, subtle strain
  • 出版物名称:   ACS APPLIED MATERIALS INTERFACES
  • ISSN:   1944-8244 EI 1944-8252
  • 通讯作者地址:   Kwangwoon Univ
  • 被引频次:   13
  • DOI:   10.1021/acsami.9b04915
  • 出版年:   2019

▎ 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.