Speaker
Description
In this work, we report the textile-based gas sensor for ammonia (NH$_3$) detection using PANi/PEDOT:PSS coated on commercially cotton yarn. A laye- by-layer of textile-based gas sensor was prepared by a facile dip coating of poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) on the cotton yarn surface followed by coated a layer of polyaniline emeraldine base (PANi) on the top of the device. For this device structure, the PEDOT:PSS was proposed as a hole transport layer, while the PANi acted as an sensitive layer. The PANi/PEDOT:PSS sensor exhibits a low base resistance $\approx$ 5 k$\Omega$ and good sensing response to NH$_3$ gas at room temperature. In comparison to PEDOT:PSS sensor, the PANi/PEDOT:PSS sensor has higher sensing response with faster response and recovery times. Moreover, the device show approximately linear increased as NH$_3$ gas concentration was increased. These results indicate that this proposed sensing device structure is possible to apply as an environment ammonia monitoring.
