HIGHLY SENSITIVE, FOLDABLE, AND TWISTABLE GAS SENSOR BASED ON TUNGSTEN DISULFIDE-FUNCTIONALIZED CARBON NANOTUBES ON CELLULOSE PAPER

초록

This paper presents a WS2-functionalized carbon nanotube (CNT)-based sensitive, foldable, and twistable NO2 sensor that is integrated on cellulose paper. The CNTs form percolation network on the surface of cellulose paper with NO2 reactivity. Functionalization of CNTs with nanolayers of WS2 significantly improves the response over 200% under 10 ppm NO2 exposure. At the same time, the cellulose paper offers a high foldability and twistability needed for robust flexible sensors. All these characteristics could enable the stable and sensitive NO2 detection even under heavy deformation as confirmed by bending down to 0.85 mm and twisting up to 1080 degrees.