University of Oulu

Tolvanen, J., Hannu, J., Jantunen, H. (2018) Stretchable and Washable Strain Sensor Based on Cracking Structure for Human Motion Monitoring. Scientific Reports, 8 (1), 13241. doi:10.1038/s41598-018-31628-7

Stretchable and washable strain sensor based on cracking structure for human motion monitoring

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Author: Tolvanen, Jarkko1; Hannu, Jari1; Jantunen, Heli1
Organizations: 1Microelectronics Research Unit, Faculty of Information Technology and Electrical Engineering, University of Oulu
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 4.2 MB)
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Language: English
Published: Springer Nature, 2018
Publish Date: 2018-09-06


Stretchable and wearable strain sensors have been intensively studied in recent years for applications in human motion monitoring. However, achieving a high-performance strain sensor with high stretchability, ultra-sensitivity, and functionality, such as tunable sensing ranges and sensitivity to various stimuli, has not yet been reported, even though such sensors have great importance for the future applications of wearable electronics. Herein, a novel and versatile strain sensor based on a cracking (silver ink patterned silicone elastomer)-(silver plated nylon structure) (Ag-DS/CF) has been designed and fabricated. The unique structure combined precisely shaped stretchable conductive fabrics and wrinkled Ag-ink pattern to achieve an excellent electrical performance. The Ag-DS/CF could be used to detect both large and subtle human motions and activities, pressure changes, and physical vibrations by achieving high stretchability up to 75%, ultrahigh sensitivity (gauge factor >104–106), tunable sensing ranges (from 7 to 75%). Excellent durability was demonstrated for human motion monitoring with machine washability. The extremely versatile Ag-DS/CF showed outstanding potential for the future of wearable electronics in real-time monitoring of human health, sports performance, etc.

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Series: Scientific reports
ISSN: 2045-2322
ISSN-E: 2045-2322
ISSN-L: 2045-2322
Volume: 8
Article number: 13241
DOI: 10.1038/s41598-018-31628-7
Type of Publication: A1 Journal article – refereed
Field of Science: 213 Electronic, automation and communications engineering, electronics
Funding: Author J.T. was supported by the Riitta and Jorma J. Takanen Foundation, Walter Ahlström Foundation, Tauno Tönning Foundation, and Finnish Foundation for Technology Promotion.
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