화학공학소재연구정보센터
학회 한국고분자학회
학술대회 2020년 가을 (10/05 ~ 10/08, 부산컨벤션센터(BEXCO))
권호 45권 1호
발표분야 기능성 고분자
제목 pH and Acid type-responsive Self-assembled Colorimetric Film of Block Copolymer Photonic Crystals
초록 Stimuli-responsive photonic crystals have been explored as optical sensors for detection of chemical and biological analytes. The stop band of these photonic films was increased with decrease in pH value or increase in hydration energy of its conjugated bases. Thus, pH value and acid type of unknown acidic solution contacted with the photonic film can be identified by the naked eye. The stop band was also tunable by using different molecular weight of block copolymer and introducing the cross-linker. The mechanism of response to pH and acid type in photonic films was explained by Henderson-Hasselbalch equation and Hydration energy of conjugated bases. To confirm our hypothesis, the swelling behavior was modeled by using the transfer matrix method (TMM) based on the experimental reflectivity spectra. This work provide useful information for the development of various photonic applications with polymers.
저자 김동현, 이찬민, 이준영, 황기섭
소속 한국생산기술(연)
키워드 pH sensing; Acid type sensing; photonic crystal; stop band; Block copolymer lamellar structure; swelling behavior
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