Sweat Detectives: A New Way to Monitor Health

Having a tiny, flexible sensor that can track crucial health signs directly from your sweat. This is what researchers have been working on with wearable sweat sensors. But making these sensors sensitive and long-lasting has been a real challenge. Here, we introduce a clever method called wet-spinning/acid-etching to create a special porous core-shell yarn. This yarn boosts the surface area for ions, making signals clear and easy to read.These sensors can closely monitor key components like potassium (K+) and pH in sweat. They're super stable, lasting over 16 hours, and can withstand lots of bending (over 1000 times). Plus, they can be made quickly, up to 500 meters per hour, ready for mass production. This means real-time health monitoring could become a normal part of our lives, with sensors that are both efficient and practical.