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ACS Appl Mater Interfaces. 2018 Feb 28;10(8):7263-7270. doi: 10.1021/acsami.7b17727. Epub 2018 Feb 15.

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

Author information

1
Department of Chemical and Biological Engineering, Korea University , 5-1 Anam-dong, Seoul 13l-701, Korea.
2
KU-KIST Graduate School of Converging Science and Technology , 5-1 Anam-dong, Seoul 13l-701, Korea.

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.

KEYWORDS:

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

PMID:
29400434
DOI:
10.1021/acsami.7b17727
[Indexed for MEDLINE]

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