Enhanced Sensitivity of Patterned Graphene Strain Sensors Used for Monitoring Subtle Human Body Motions

Sang Woo Lee, Jung Jin Park, Byung Hyun Park, Sung Cik Mun, Yong Tae Park, Kin Liao, Tae Seok Seo, Woo Jin Hyun*, O. Ok Park

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

55 Scopus citations

Abstract

With the growth of the wearable electronics industry, structural modifications of sensing materials have been widely attempted to improve the sensitivity of sensors. Herein, we demonstrate patterned graphene strain sensors, which can monitor small-scale motions by using the simple, scalable, and solution-processable method. The electrical properties of the sensors are easily tuned via repetition of the layer-by-layer assembly, leading to increment of thickness of the conducting layers. In contrast to nonpatterned sensors, the patterned sensors show enhanced sensitivity and the ability to distinguish subtle motions, such as similar phonations and 81 beats per minute of pulse rate.

Original languageEnglish
Pages (from-to)11176-11183
Number of pages8
JournalACS applied materials & interfaces
Volume9
Issue number12
DOIs
StatePublished - 29 Mar 2017
Externally publishedYes

Keywords

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

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