Electrical Failure Mechanism in Stretchable Thin-Film Conductors

Zhao, Yang; Yu, Mei; Sun, Jing; Zhang, Shenglong; Li, Qingsong; Teng, Lijun; Tian, Qiong; Xie, Ruijie; Li, Guanglin; Liu, Zhiyuan

doi:10.1021/acsami.1c22447

Cited by 11 publications

(4 citation statements)

References 41 publications

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“…The concept and the detailed fabrication processes of the self-closing stretchable cuff electrode are demonstrated schematically in Figure . In the previous study, − we developed SNCG films, which have been applied for fabricating stretchable electrodes. The resulting electrodes could maintain high conductivity even under the largest uniaxial strain of 110%.…”

Section: Results and Discussionmentioning

confidence: 99%

Self-Closing Stretchable Cuff Electrodes for Peripheral Nerve Stimulation and Electromyographic Signal Recording

Wang

Cui

et al. 2023

ACS Appl. Mater. Interfaces

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The cuff electrode can be wrapped in the columnar or tubular biological tissue for physiological signal detection or stimulation regulation. The reliable and non-excessive interfaces between the electrode and complex tissue are critical. Here, we propose a self-closing stretchable cuff electrode, which is able to self-close onto the bundles of tissues after dropping water. The curliness is realized by the mechanical stress mismatch between different layers of the elastic substrate. The material of the substrate can be selected to match the modulus of the target tissue to achieve minimal constraint on the tissue. Moreover, the self-closing structure keeps the cuff electrode free from any extra mechanical locking structure. For in vivo testing, both sciatic nerve stimulation to drive muscles and electromyographic signal monitoring around a rat’s extensor digitorum longus for 1 month prove that our proposed electrode conforms well to the curved surface of biological tissue.

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Section: Results and Discussionmentioning

confidence: 99%

Self-Closing Stretchable Cuff Electrodes for Peripheral Nerve Stimulation and Electromyographic Signal Recording

Wang

Cui

et al. 2023

ACS Appl. Mater. Interfaces

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“…Different patterned masks were covered on the film. The magnetic sputtering deposition power, pressure, and time were 150 W, 3.8 Pa of argon, and 8 s, respectively . A conductive porous film was obtained after releasing from the wafer in a water bath.…”

Section: Methodsmentioning

confidence: 99%

Ultrapermeable and Wet-Adhesive Monolayer Porous Film for Stretchable Epidermal Electrode

Tian

Zhao

Zhou

et al. 2022

ACS Appl. Mater. Interfaces

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Noninvasive electrophysiological signal monitoring is significant for health care and scientific research. The simultaneous achievement of wet adhesion, stretchability, breathability, and low contact impedance is highly recommended in the epidermal electrode but still challenging. In this work, a monolayer porous film electrode with a pore size and wall thickness of less than ∼10 μm is fabricated via the breath figure method (BFM) and metal sputtering, and it was subsequently applied using epidermal electrophysiological monitoring. The ultrahigh permeability is comparable to the naked skin because the through holes of the monolayer porous film match well with the pores on human skin. The stretchability of 50% is realized with the combination of Au microcrack and the monolayer porous structure. The wet adhesion of 0.17 N/cm is established on the chemical bonding between the electrode and the epidermis. The contact impedance is comparable with the gold standard Ag/AgCl gel electrode, especially after sweating. Stable and precise electrophysiological signals are measured. Especially, the perspiration resistance of the monolayer porous film outperforms that of the gel electrode. The monolayer porous structure provides a new avenue to improve the breathability of the epidermal electronics.

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“…24 Xie et al investigated a ferromagnetic hydrogel actuator containing oriented ferromagnetic Co nanorods with high magnetic anisotropy, which enabled various driving behaviors by manipulating the design of magnetic domains. 25 However, these hydrogels typically lack mechanical robustness, rendering them unsuitable for engineering applications. If the stiffness of the hydrogel is increased, a stronger magnetic field would be required to induce deformation.…”

Section: Introductionmentioning

confidence: 99%