Highly chemoresistive humidity sensing using poly(ionic liquid)s

A novel resistance type humidity sensor was fabricated using poly(ionic liquid)s PEVIm-Br, which not only exhibited high sensitivity at a relative humidity (RH) in the range of 11-98%, but also featured short response and recovery time, as well as small hysteresis and good repeatability, proving poly(ionic liquid) s to be promising sensing materials for high-performance humidity sensors.