Stretchable patterned graphene gas sensor driven by integrated micro-supercapacitor array

Junyeong Yun, Yein Lim, Gwon Neung Jang, Daeil Kim, Seung Jung Lee, Heun Park, Soo Yeong Hong, Geumbee Lee, Goangseup Zi, Jeong Sook Ha

Research output: Contribution to journalArticle

99 Citations (Scopus)

Abstract

We report on the fabrication of a stretchable patterned graphene gas sensor driven by integrated micro-supercapacitor (MSC) array on the same deformable substrate. The integrated MSCs consist of polyaniline-wrapped multi-walled carbon nanotube electrodes and an ionogel electrolyte of poly(ethylene glycol)diacrylate and 1-ethyl-3-methylimidazoliumbis (trifluoromethylsulfonyl) imide. The deformable soft Ecoflex substrate was designed to suppress the applied strain on the gas sensor and MSCs via insertion of stiff platforms of SU-8 underneath and serpentine electrical interconnections of polymer-encapsulated long and narrow Au thin film. The fabricated MSC array demonstrated stable electrochemical performance under a uniaxial strain of 50% and a biaxial strain of 40%, maintaining its initial characteristics even after 1000 cycles of repetitive uniaxial and biaxial stretching. Furthermore, the patterned-graphene sensor detected NO2 gas for longer than 50min via integration with MSCs using the serpentine interconnections even under uniaxial stretching by 50%. This work suggests fundamental progress towards the development of stretchable environmental sensor system which can be driven by integrated energy storage devices without external long wire connections to power source.

Original languageEnglish
Pages (from-to)401-414
Number of pages14
JournalNano Energy
Volume19
DOIs
Publication statusPublished - 2016 Jan 1

Keywords

  • Integration
  • Micro-supercapacitor array
  • NO gas sensor
  • Patterned graphene
  • Serpentine interconnection
  • Stretchable

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)
  • Electrical and Electronic Engineering

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