Nacre-inspired tunable strain sensor with synergistic interfacial interaction for sign language interpretation

Wangjiehao Xu, Suya Hu, Yi Zhao, Wei Zhai, Yanhui Chen, Guoqiang Zheng, Kun Dai, Chuntai Liu, Changyu Shen

Research output: Contribution to journalArticlepeer-review

65 Scopus citations

Abstract

A highly sensitive and stretchable strain sensor is urgently required in wearable applications. Nevertheless, high sensitivity requiring a significant structural variation even at a subtle deformation and large stretchability related to morphological integrity under a large strain are considered as two contradictory performance indicators of strain sensors. It remains a huge challenge to synchronously acquire high sensitivity and wide detection range. Herein, we prepare a strain sensor with nacre-mimetic structure through spaying Ti-O-C covalent bonding crosslinked MXene/reduced graphene oxide (rGO) (MGO) solution among the multilayer thermoplastic polyurethane (TPU) electrospun mat. The special nacre-mimetic structure and the synergistic motion of different nanosheets endow the MGO/TPU strain sensor (MGTSS) with high sensitivity (GF of 879 within 100% strain, GF of 17782 for a strain of 100%−160%, and 84326 for a strain of 160%−200%), ultra-low detection limit (0.05% strain), large detection range (up to 200% strain), short response time (70 ms) and a favorable sensing stability and durability (5000 stretching/releasing cycles). Moreover, the nacre-mimetic strain sensor can be used for sign language interpretation through monitoring finger gestures, showing great promise for applications in next-generation of wearable flexible electronics devices.

Original languageEnglish
Article number106606
JournalNano Energy
Volume90
DOIs
StatePublished - Dec 2021

Keywords

  • MXene
  • Nacre-mimetic structure
  • Sign language
  • Strain sensor
  • Ti-O-C covalent bonding

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