Ionic-Gel-coated fabric as flexible humidity sensor

We fabricated flexible humidity sensor which responds 10 times faster than commercial CMOS humidity sensor. Our sensor is based on Ionic-Gel-coated Fabric (IG-Fabric). We use EMIMBF₄ as ionic liquid and mixed with PVDF to fabricate ionic gel. The EMIMBF₄ has a characteristic that it absorbs H₂O and changes its impedance. IG-Fabric has wide surface area and high gas permeability so that gases can be easily absorbed and detached. This sensor has many applications such as flu-mask-type human breath sensor, wearable humidity sensor.