3D Printed MXene-Based Wire Strain Sensors with Enhanced Sensitivity and Anisotropy

Jingqi Lu, Guoyin Zhu, Shaolong Wang, Chunjin Wu, Xinyu Qu, Xiaochen Dong, Huan Pang, Yizhou Zhang

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

Stretchable strain sensors play a crucial role in intelligent wearable systems, serving as the interface between humans and environment by translating mechanical strains into electrical signals. Traditional fiber strain sensors with intrinsic uniform axial strain distribution face challenges in achieving high sensitivity and anisotropy. Moreover, existing micro/nano-structure designs often compromise stretchability and durability. To address these challenges, a novel approach of using 3D printing to fabricate MXene-based flexible sensors with tunable micro and macrostructures. Poly(tetrafluoroethylene) (PTFE) as a pore-inducing agent is added into 3D printable inks to achieve controllable microstructural modifications. In addition to microstructure tuning, 3D printing is employed for macrostructural design modifications, guided by finite element modeling (FEM) simulations. As a result, the 3D printed sensors exhibit heightened sensitivity and anisotropy, making them suitable for tracking static and dynamic displacement changes. The proposed approach presents an efficient and economically viable solution for standardized large-scale production of advanced wire strain sensors.

Original languageEnglish
Article number2401565
JournalSmall
Volume20
Issue number37
DOIs
StatePublished - 12 Sep 2024

Keywords

  • anisotropy
  • microstructure design
  • pore size and porosity
  • sensitivity
  • wire strain sensors

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