A photonic sintering derived Ag flake/nanoparticle-based highly sensitive stretchable strain sensor for human motion monitoring

Inhyuk Kim, Kyoohee Woo, Zhaoyang Zhong, Pyungsam Ko, Yunseok Jang, Minhun Jung, Jeongdai Jo, Sin Kwon, Seung Hyun Lee, Sungwon Lee, Hongseok Youn, Jooho Moon

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35 Citations (Scopus)

Abstract

Recently, the demand for stretchable strain sensors used for detecting human motion is rapidly increasing. This paper proposes high-performance strain sensors based on Ag flake/Ag nanocrystal (NC) hybrid materials incorporated into a polydimethylsiloxane (PDMS) elastomer. The addition of Ag NCs into an Ag flake network enhances the electrical conductivity and sensitivity of the strain sensors. The intense localized heating of Ag flakes/NCs is induced by intense pulsed light (IPL) irradiation, to achieve efficient sintering of the Ag NCs within a second, without damaging the PDMS matrix. This leads to significant improvement in the sensor sensitivity. Our strain sensors are highly stretchable (maximum strain = 80%) and sensitive (gauge factor = 7.1) with high mechanical stability over 10 000 stretching cycles under 50% strain. For practical demonstration, the fabrication of a smart glove for detecting the motions of fingers and a sports band for measuring the applied arm strength is also presented. This study provides an effective method for fabricating elastomer-based high-performance stretchable electronics.

Original languageEnglish
Pages (from-to)7890-7897
Number of pages8
JournalNanoscale
Volume10
Issue number17
DOIs
Publication statusPublished - 2018 May 7

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

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    Kim, I., Woo, K., Zhong, Z., Ko, P., Jang, Y., Jung, M., Jo, J., Kwon, S., Lee, S. H., Lee, S., Youn, H., & Moon, J. (2018). A photonic sintering derived Ag flake/nanoparticle-based highly sensitive stretchable strain sensor for human motion monitoring. Nanoscale, 10(17), 7890-7897. https://doi.org/10.1039/c7nr09421c