| 초록 |
NO2 gas can accumulate in our body, causing gradual inflammation and chronic respiratory disease. Although there is a need for a system that can follow trace of cumulative NO2 gas, majority of gas sensor studies have only focused on high sensing capability, so that memorizing system for accumulated NO2 gas is still not realized. Herein, we demonstrate amine-functionalized semiconducting polymer gel (NH2-SPG) where amine groups are anchored in the entire film by utilizing unreacted silanol groups of the SPG. The functionalized NH2 groups not only improve sensitive and selective characteristics toward NO2, but also enhance the cumulative effect of exposure history of NO2 gas. This is because the NH2 groups acting as a NO2 trap site postpone recovery time of penetrated NO2 gas, leading to amplification of paired pulse facilitation (PPF) memory signal. We believe that our approach for retention of historical information of toxic gas will be a guidance for advanced sensor application. |
