| 초록 |
Gas sensing has gathered interest regarding sensing toxic gases, pollution, and diagnosis of illness. 2D materials were commonly exploited as gas sensor owing to its chemical properties. In particular, MXene has caught attention as highly sensitive gas sensing material due to its metallic properties along with hydrophilic surface, causing high signal to noise ratio (SNR) values. In this work, we were able to fabricate highly conductive cation-intercalated MXene film with high SNR via self-assembling method. Rayleigh-Bernard convection and Marangoni effect initiated self-assembly, while cation-intercalated MXene sheets were spontaneously assembled when alkali metal cations were added. Assembled films were transferred onto gas sensing electrodes for room temperature ammonia sensing. They exhibited high SNR compared to the film without intercalated metal cations, and showed linear gas response. Also, stable gas sensing performances were demonstrated with repeated exposure to ammonia gas. |
