A battery-free sticker reads vitamin C levels from fingertip sweat by turning any drinking cup into a smart health sensor.

Full study: “ A smart cup for wireless, biofuel-powered, sweat-based vitamin C sensing .” Co-authors of the study include Muhammad Inam Khan*, Ryan Burns*, Akshit Agarwal, Lu Yin, Jongmin Moon, Bumsik ...

If you’d like to fix or even diagnose anything involving electricity – whether it’s the energy that surges through a car, ...

Abstract: In this work, a series of fiber-optic salinity sensors were prepared. The sensing principle of salinity sensor is the changes of reflection coefficient and evanescent wave attenuation with ...