1 research outputs found
Fabrication of High-Sensitivity Skin-Attachable Temperature Sensors with Bioinspired Microstructured Adhesive
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 polyÂ(<i>N</i>-isopropylacrylamide) (pNIPAM)-temperature sensitive hydrogel,
polyÂ(3,4-ethylenedioxythiophene) polystyrene sulfonate, and carbon
nanotubes exhibits a very high thermal sensitivity of 2.6%·°C<sup>–1</sup> 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