Skin inspired fractal strain sensors using a copper nanowires and graphite microflakes hybrid conductive network

Naveen N. Jason, Stephen J. Wang, Sushrut Sandeep Bhanushali, Wenlong Cheng

Research output: Contribution to journalArticleResearchpeer-review

Abstract

This work demonstrates a facile “paint-on” approach to fabricate highly stretchable and highly sensitive strain sensors by combining one-dimensional copper nanowire networks with two-dimensional graphite microflakes. This paint-on approach allows for the fabrication of electronic skin (e-skin) patches which can directly replicate with high fidelity the human skin surface they are on,regardless of the topological complexity. This leads to high accuracy for detecting biometric signals for applications in personalised wearable sensors. The copper nanowires contribute to high stretchability and the graphite flakes offer high sensitivity, and their hybrid coating offers the advantages of both. To understand the topological effects on the sensing performance, we utilized fractal shaped elastomeric substrates and systematically compared their stretchability and sensitivity. We could achieve a high stretchability of up to 600% and a maximum gauge factor of 3000. Our simple yet efficient paint-on approach enabled facile fine-tuning of sensitivity/stretchability simply by adjusting ratios of 1D vs. 2Dmaterials in the hybrid coating, and the topological structural designs. This capability leads to a wide range of biomedical sensors demonstrated here, including pulse sensors, prosthetic hands, and a wireless ankle motion sensor.
Original languageEnglish
Pages (from-to)16596-16605
Number of pages10
JournalNanoscale
Volume8
Issue number37
DOIs
Publication statusPublished - 2016

Cite this

@article{4866dae6463b442395882f1f0332483f,
title = "Skin inspired fractal strain sensors using a copper nanowires and graphite microflakes hybrid conductive network",
abstract = "This work demonstrates a facile “paint-on” approach to fabricate highly stretchable and highly sensitive strain sensors by combining one-dimensional copper nanowire networks with two-dimensional graphite microflakes. This paint-on approach allows for the fabrication of electronic skin (e-skin) patches which can directly replicate with high fidelity the human skin surface they are on,regardless of the topological complexity. This leads to high accuracy for detecting biometric signals for applications in personalised wearable sensors. The copper nanowires contribute to high stretchability and the graphite flakes offer high sensitivity, and their hybrid coating offers the advantages of both. To understand the topological effects on the sensing performance, we utilized fractal shaped elastomeric substrates and systematically compared their stretchability and sensitivity. We could achieve a high stretchability of up to 600{\%} and a maximum gauge factor of 3000. Our simple yet efficient paint-on approach enabled facile fine-tuning of sensitivity/stretchability simply by adjusting ratios of 1D vs. 2Dmaterials in the hybrid coating, and the topological structural designs. This capability leads to a wide range of biomedical sensors demonstrated here, including pulse sensors, prosthetic hands, and a wireless ankle motion sensor.",
author = "Jason, {Naveen N.} and Wang, {Stephen J.} and Bhanushali, {Sushrut Sandeep} and Wenlong Cheng",
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language = "English",
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journal = "Nanoscale",
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publisher = "The Royal Society of Chemistry",
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Skin inspired fractal strain sensors using a copper nanowires and graphite microflakes hybrid conductive network. / Jason, Naveen N.; Wang, Stephen J.; Bhanushali, Sushrut Sandeep; Cheng, Wenlong.

In: Nanoscale, Vol. 8, No. 37, 2016, p. 16596-16605.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

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AU - Jason, Naveen N.

AU - Wang, Stephen J.

AU - Bhanushali, Sushrut Sandeep

AU - Cheng, Wenlong

PY - 2016

Y1 - 2016

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AB - This work demonstrates a facile “paint-on” approach to fabricate highly stretchable and highly sensitive strain sensors by combining one-dimensional copper nanowire networks with two-dimensional graphite microflakes. This paint-on approach allows for the fabrication of electronic skin (e-skin) patches which can directly replicate with high fidelity the human skin surface they are on,regardless of the topological complexity. This leads to high accuracy for detecting biometric signals for applications in personalised wearable sensors. The copper nanowires contribute to high stretchability and the graphite flakes offer high sensitivity, and their hybrid coating offers the advantages of both. To understand the topological effects on the sensing performance, we utilized fractal shaped elastomeric substrates and systematically compared their stretchability and sensitivity. We could achieve a high stretchability of up to 600% and a maximum gauge factor of 3000. Our simple yet efficient paint-on approach enabled facile fine-tuning of sensitivity/stretchability simply by adjusting ratios of 1D vs. 2Dmaterials in the hybrid coating, and the topological structural designs. This capability leads to a wide range of biomedical sensors demonstrated here, including pulse sensors, prosthetic hands, and a wireless ankle motion sensor.

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