Biomimetic metal–organic framework-derived porous carbon welded carbon nanotube networks for strain sensors with high sensitivity and wide sensing range

Lin Liu, Yongju Gao, Yikun Liu, Meiling Xu, Shuhua Yang, Kui Li, Songfang Zhao, Duxia Cao, Jong Hyun Ahn

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

Due to the weak interaction between the adjacent individual fillers of sensing materials, the destruction of conductive percolation network under large and cyclic deformations results in a narrow sensing region and unsatisfactory durability. Inspired by the geometries of spider web and spider slit organ, a versatile strain-sensing platform with metal–organic framework-derived porous carbon-welding carbon nanotube (MPC–w–CNT) percolation networks is reported by soldering the crossing-points of CNTs using MPCs followed by embedding in poly(styrene-block-butadiene-block-styrene) (SBS), which can enable effective transfer of electrons and load among adjacent CNTs as well as avoid the interfacial slippage during cyclic processes of stretching-releasing. The junction bonding could enable the bioinspired strain sensors to detect small and large deformations with a low limit of detection (0.0085% strain), a large sensing region (∼640% strain), high sensitivity (∼7378.26), and short response time (∼122.50 ms), along with excellent reliability (∼1,000 stretching-releasing cycles). The superiority of these sensing performances is assigned to the combination of welding design of hierarchical MPC–w–CNT networks and selection of SBS. These excellent sensing performances allow the bioinspired sensors to detect the full range of human movements. The unique junction bonding strategy can be applied in other nanomaterial systems to develop stretchable electronics.

Original languageEnglish
Article number153417
JournalApplied Surface Science
Volume593
DOIs
Publication statusPublished - 2022 Aug 15

Bibliographical note

Publisher Copyright:
© 2022 Elsevier B.V.

All Science Journal Classification (ASJC) codes

  • General Chemistry
  • Condensed Matter Physics
  • General Physics and Astronomy
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

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