| 초록 |
In this work, QCM-based array adsorption sensor system coated with functional polymers such as polypyrrole, PEDOT, polystyrene (PS), polyisobutylene (PIB) were developed for adsorption ofCO2, SO2 and NO2 at room temperature in vacuum condition. Sensing films were coated onto quartz piezoelectric using by spin coating for 30s. The loading mass of polymers coated on QCMs were about 4000~ 5000ng. The morphology and characteristics of the sensing polymers coated with quartz crystals were investigated by AFM and FE-SEM. The frequency shifts change of the QCM by adsorption and desorption of gases are measured and analyzed to assess the practical applicability of the sensor system. The results showed that the Ppy coated with quartz crystal have high sensitivity, good stability and short response/recovery time at SO2. The other hands, PEDOT have high sensitivity for NO2 and CO2 than other polymers. |
