Fabrication of High-Sensitivity Skin-Attachable Temperature Sensors with Bioinspired Microstructured Adhesive

Ju Hyun Oh, Soo Yeong Hong, Heun Park, Sang Woo Jin, Yu Ra Jeong, Seung Yun Oh, Junyeong Yun, Hanchan Lee, Jung Wook Kim, Jeong Sook Ha

Research output: Contribution to journalArticle

50 Citations (Scopus)

Abstract

In this study, we demonstrate the fabrication of a highly sensitive flexible temperature sensor with a bioinspired octopus-mimicking adhesive. A resistor-type temperature sensor consisting of a composite of poly(N-isopropylacrylamide) (pNIPAM)-temperature sensitive hydrogel, poly(3,4-ethylenedioxythiophene) polystyrene sulfonate, and carbon nanotubes exhibits a very high thermal sensitivity of 2.6%·°C-1 between 25 and 40 °C so that the change in skin temperature of 0.5 °C can be accurately detected. At the same time, the polydimethylsiloxane adhesive layer of octopus-mimicking rim structure coated with pNIPAM is fabricated through the formation of a single mold by utilizing undercut phenomenon in photolithography. The fabricated sensor shows stable and reproducible detection of skin temperature under repeated attachment/detachment cycles onto skin without any skin irritation for a long time. This work suggests a high potential application of our skin-attachable temperature sensor to wearable devices for medical and health-care monitoring.

Original languageEnglish
Pages (from-to)7263-7270
Number of pages8
JournalACS Applied Materials and Interfaces
Volume10
Issue number8
DOIs
Publication statusPublished - 2018 Feb 28

Keywords

  • bioinspired adhesive
  • poly(3,4-ethylenedioxythiophene) polystyrene sulfonate-carbon nanotube composite
  • poly(N-isopropylacrylamide)
  • skin-attachable sensors
  • temperature sensor

ASJC Scopus subject areas

  • Materials Science(all)

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