| 초록 |
Ti3C2Tx MXene, a family of two-dimensional (2D) transition metal carbides/carbonitrides, has drawn huge attention due to their unique physicochemical properties. The combination of their metallic conductivity along with their rich surface functionality has been exploited in many applications in the form of transparent conducting MXene films, where they have shown great promise in chemical sensing. In this work, we demonstrate a spontaneous metal-ion intercalation into MXene thin film, which has high transparency, conductivity, and enhanced gas sensing response. MXene films were self-assembled at the air/water interface derived from Rayleigh-Bernard convection and Marangoni effect, with the assistance of alkali metal cations. Fabricated films showed average transmittance of 90% and it showed different optoelectronic properties depending on the type of intercalated cation. Metal-ion intercalated MXene films were utilized as a room temperature NH3 gas sensor, which showed ultrahigh signal-to-noise ratio compared to the film without metal ion. It implies a positive influence of metal ion on enhancing gas sensing performance. |
