Cited by 144Advanced Sensor and Energy Harvesting MaterialsGraphene research and applicationsNanomaterials and Printing Technologies

Ultrasensitive and Stretchable Strain Sensors Based on Mazelike Vertical Graphene Network

Wu, Shuying, Peng, Shuhua, Han, Zhao Jun, Zhu, Hongwei, Wang, Chun H.·2018·ACS Applied Materials & Interfaces

Abstract

Here, we report a new type of strain sensors consisting of vertical graphene nanosheets (VGNs) with mazelike network, sandwiched between poly(dimethylsiloxane) (PDMS) substrates. The new sensors outperform most graphene thin-film-based sensors reported previously and show an outstanding combination of high stretchability of ∼120%, excellent linearity over the entire detection range, and high sensitivity with a gauge factor of ∼32.6. The sensitivity can be tuned by controlling the thickness of VGNs, with sensors consisting of thicker VGNs showing higher sensitivity but slightly lower stretchability (the maximum gauge factor is ∼88.4 with a maximum detection strain of ∼55%). Detailed microscopic examinations reveal that the ultrahigh sensitivity stems from the formation of microcracks initiated in the buffer layer. These microcracks are bridged by strings of graphene/PDMS, enabling the conductive network to continue to function up to a strain level significantly higher than that of previously reported graphene thin-film-based sensors. Furthermore, the present sensors have been found to be insensitive to temperatures and various liquids, including water and 0.1 mol L –1 sodium chloride solution (similar to the sweat on human skin). Demonstrations are presented to highlight the new sensors’ potential as wearable devices for human motion detection and pressure distribution measurement.

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Crossref · 10.1021/acsami.8b15848

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  • Sensor units based on novel materials such as graphene, MXenes, and hydrogels achieve an excellent combination of high stretchability and high sensitivity, accurately capturing strain gradients of the epidermis during joint flexion and the trajectory of plantar pressure center migration.

    “Among them, sensor units based on novel materials such as graphene 107 , MXenes 108 , and hydrogels 70 achieve an excellent combination of high stretchability and high sensitivity, accurately capturing strain gradients of the epidermis during joint flexion and the trajectory of plantar pressure center migration.”

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Authors
Wu, S., Peng, S., Han, Z. J., Zhu, H., & Wang, C. H.
Affiliations
  • UNSW Sydney (AU)
  • CSIRO Manufacturing, P.O. Box 218, 36 Bradfield Road, Lindfield, NSW 2070, Australia
  • State Key Laboratory of New Ceramics and Fine Processing (CN)
  • School of Mechanical and Manufacturing Engineering, University of New South Wales, Sydney, NSW 2052, Australia
Venue
ACS Applied Materials & Interfaces
Published
2018-09-26
Volume
10
Issue
42
Pages
36312-36322
ISSN
  • 1944-8244 (ISSN-L)
  • 1944-8252
OpenAlex
W2893339721
Cited by
144
References
51
Citations by year
2026: 4 · 2025: 16 · 2024: 14 · 2023: 20 · 2022: 20 · 2021: 26 · 2020: 24 · 2019: 20
FWCI
7.00
Type
journal article
Language
en
Open access
closed
Locations
  • ACS Applied Materials & Interfaces (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Australian Research Council (DE170100284)
  • Tsinghua University
Topics
  • Physical Sciences › Engineering › Biomedical Engineering › Advanced Sensor and Energy Harvesting Materials
  • Physical Sciences › Materials Science › Materials Chemistry › Graphene research and applications
  • Physical Sciences › Engineering › Electrical and Electronic Engineering › Nanomaterials and Printing Technologies
Keywords
strain sensors, vertical graphene nanosheets, stretchable electronics, gauge factor, microcracks, wearable devices, human motion detection, pressure distribution measurement, temperature-insensitive sensing

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