Highly stretchable and wearable graphene strain sensors with controllable sensitivity for human motion monitoring

Jung Jin Park, Woo Jin Hyun, Sung Cik Mun, Yong Tae Park, O. Ok Park*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

436 Scopus citations

Abstract

Because of their outstanding electrical and mechanical properties, graphene strain sensors have attracted extensive attention for electronic applications in virtual reality, robotics, medical diagnostics, and healthcare. Although several strain sensors based on graphene have been reported, the stretchability and sensitivity of these sensors remain limited, and also there is a pressing need to develop a practical fabrication process. This paper reports the fabrication and characterization of new types of graphene strain sensors based on stretchable yarns. Highly stretchable, sensitive, and wearable sensors are realized by a layer-by-layer assembly method that is simple, low-cost, scalable, and solution-processable. Because of the yarn structures, these sensors exhibit high stretchability (up to 150%) and versatility, and can detect both large- and small-scale human motions. For this study, wearable electronics are fabricated with implanted sensors that can monitor diverse human motions, including joint movement, phonation, swallowing, and breathing.

Original languageEnglish
Pages (from-to)6317-6324
Number of pages8
JournalACS applied materials & interfaces
Volume7
Issue number11
DOIs
StatePublished - 25 Mar 2015
Externally publishedYes

Keywords

  • graphene
  • human motion monitoring
  • layer-by-layer assembly
  • strain sensor
  • stretchable electronics

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