| 학회 |
한국공업화학회 |
| 학술대회 |
2022년 봄 (05/11 ~ 05/13, 제주국제컨벤션센터(ICC JEJU)) |
| 권호 |
26권 1호 |
| 발표분야 |
학생우수논문발표(박사과정) |
| 제목 |
Ultrafast colorimetric gas sensors using a disordered nanoparticle-based interferometer |
| 초록 |
Disorderedplasmonic nanostructures have attracted attention due to their unique opticalproperties such as lithography-free fabrication, strong absorption inbroadband, optical asymmetry, and material insensitivity. Here, we present adisordered plasmonic system using a ligand exchange reaction and thenanoparticle-embedded etalon which shows high purity reflective colors thanconventional interferometry systems. Additionally, an ultrafast colorimetricgas sensor can be fabricated by enclosing hydrogel into the cavity of theetalon. The chitosan hydrogel can reversibly expand/shrink depending onhumidity. The change of chitosan height drastically shifts the resonance peakof the interferometry. Unlike conventional thin metal films, the porousstructure of the disordered system does not hinder the movement of gasmolecules, ensuring a fast response time of 100 ms. This colorimetric sensorcan be applied to anticounterfeiting labels and smart displays due to theirimmediate responses. |
| 저자 |
정충환1, 김수정2, 장재혁1, 고주환3, 김도아2, 고병수1, 송영민3, 홍성훈2, 노준석1
|
| 소속 |
1포항공과대, 2ETRI, 3GIST |
| 키워드 |
Plasmonics; disordered metasurfaces; Fabry-Perot etalon; colorimetric sensor; gas sensor
|
| E-Mail |
|
