Researchers have developed novel ISM-based sweat sensors that feature enhanced signal stability and performance and avoid skin contact, while also being reusable, making them practical for daily use.
When exposed to small amounts of water, rose petals are hydrophilic, allowing droplets to stick. But when the water exceeds a certain threshold, their surfaces become hydrophobic, triggering a self-cleaning effect that repels all water. By studying the microtexture of rose petals, the team found that inner petals feature fine microwrinkles, while outer petals had polygonal islands surrounded by wrinkles and spike-like protrusions in the center.
Using molds of both petal types, the team fabricated two polyvinyl chloride (PVC)-based ISMs layered onto CNT-forest substrates: sensor A replicated the microtexture of the inner petals, and sensor B mimicked the outer petals. Both sensors demonstrated significantly improved water retention in static conditions compared to conventional ISMs. Notably, sensor A showed the highest water retention, making it suitable for sweat monitoring during movement. (Image credit: Waseda University)
For more information, visit here .
