| 초록 |
Recently, various photonic crystal hydrogel sensors having inverse opal structures have been studied. We fabricated an inverse opal hydrogel sensor that can detect CO2 gas in the open system as well as the closed system. In our system, the dissolved CO2 was converted to carbonate anion which reacts with amine functional group within the hydrogel to induce hydrogel swelling. The sensor was fabricated by DEECA (Directed Enhanced water Evaporation for Colloidal Assembly) method. On the hydrogel sensors in water, a steady flow of CO2 and N2 mixed gas was applied at various ratios. The peak diffraction wavelength were obtained according to the concentration of CO2 gas. Also, the recovery of the sensor after CO2 sensing was investigated. |
