Paper-Like, Thin, Foldable, and Self-Healable Electronics Based on PVA/CNC Nanocomposite Film

Jung Wook Kim, Heun Park, Geumbee Lee, Yu Ra Jeong, Soo Yeong Hong, Kayeon Keum, Junyeong Yoon, Min Su Kim, Jeong Sook Ha

Research output: Contribution to journalArticlepeer-review

107 Citations (Scopus)


The facile fabrication of thin and foldable self-healing electronics on a poly(vinyl alcohol)/cellulose nanocrystal (PVA/CNC) composite film is reported. The self-healing property of the PVA/CNC nanocomposite film can be activated by spraying water on the film surface, via dynamic formation of hydrogen bonding. The self-healing efficiency of PVA/CNC is influenced by the content of CNC in the film, pH of the spraying solution, and the temperature. Via vacuum filtration and pattern transfer techniques, both a supercapacitor and a temperature sensor are fabricated on the same PVA/CNC film using gold nanosheet (AuNS) and polyaniline/multiwalled nanotube (PANI/MWCNT) electrodes. The fabricated supercapacitor with a gel-type electrolyte exhibits a high electrochemical performance, and the thermoresistive temperature sensor shows a linear sensitivity with a fast response. Both devices exhibit superior mechanical stability and self-healing property over 100 repetitive folding and five repetitive healing cycles, respectively, retaining the device performance owing to the percolated network of the conductive materials. This work demonstrates that our paper-like thin PVA/CNC film-based self-healable devices can serve as highly durable and deformable electronics with longevity.

Original languageEnglish
Article number1905968
JournalAdvanced Functional Materials
Issue number50
Publication statusPublished - 2019 Dec 1

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korean government (MSIP) (Grant No. NRF-2019R1A2B5B03069545). It was also supported by a Korea University Grant. The authors also thank the KU-KIST graduate school program of Korea University.

Publisher Copyright:
© 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim


  • foldable electronics
  • poly(vinyl alcohol)/cellulose nanocrystal nanocomposites
  • self-healing electronics
  • self-healing supercapacitors
  • thermoresistive temperature sensors

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • General Chemistry
  • General Materials Science
  • Electrochemistry
  • Biomaterials


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