P‐10.11: Digital Microfluidics Chip for Sweat Detection Based on Dielectric Wetting

Abstract

Digital microfluidics (DMF) is a technique for actively dispensing and manipulating discrete microdroplets on hydrophobic surfaces. DMF devices based on electrowetting on medium (EWOD) effect are widely used due to their advantages of fast response speed, simple system and high accuracy. Microfluidics is important for sweat sensing because it minimizes sweat pollution and evaporation of sweat on the skin. However, the current microfluidic channel has some problems, such as the old and new sweat is easy to mix in the channel, the self‐driving efficiency is too low, and the small sweat volume cannot be detected in time. Digital microfluidics can accurately transmit small sweats, avoid sweat residue in the channel, and have high voltage drive efficiency. Therefore, in this paper, we will use DMF digital microfluidic array technology to realize the collection of trace sweat, and realize the collection and detection of micro‐nano fabrication technology—photolithography. In this way, it is a microfluidic sweat sensor that realizes efficient transmission, trace detection, and intelligent monitoring, and is expected to be applied in wearable sweat sensing.