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ACS Nano. 2018 May 22;12(5):4259-4268. doi: 10.1021/acsnano.7b07795. Epub 2018 Apr 6.

Highly Sensitive Multifilament Fiber Strain Sensors with Ultrabroad Sensing Range for Textile Electronics.

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School of Electrical and Electronic Engineering , Yonsei University , 50 Yonsei-ro, Seodaemun-Gu, Seoul 03722 , Republic of Korea.
Center for Biomaterials, Biomedical Research Institute , Korea Institute of Science and Technology , Seoul 02792 , Republic of Korea.
Division of Bio-Medical Science & Technology, KIST School , Korea University of Science and Technology , Seoul 02792 , Republic of Korea.


Highly stretchable fiber strain sensors are one of the most important components for various applications in wearable electronics, electronic textiles, and biomedical electronics. Herein, we present a facile approach for fabricating highly stretchable and sensitive fiber strain sensors by embedding Ag nanoparticles into a stretchable fiber with a multifilament structure. The multifilament structure and Ag-rich shells of the fiber strain sensor enable the sensor to simultaneously achieve both a high sensitivity and largely wide sensing range despite its simple fabrication process and components. The fiber strain sensor simultaneously exhibits ultrahigh gauge factors (∼9.3 × 105 and ∼659 in the first stretching and subsequent stretching, respectively), a very broad strain-sensing range (450 and 200% for the first and subsequent stretching, respectively), and high durability for more than 10 000 stretching cycles. The fiber strain sensors can also be readily integrated into a glove to control a hand robot and effectively applied to monitor the large volume expansion of a balloon and a pig bladder for an artificial bladder system, thereby demonstrating the potential of the fiber strain sensors as candidates for electronic textiles, wearable electronics, and biomedical engineering.


biomedical engineering; fiber strain sensors; strain sensors; stretchable electronics; wearable electronics


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