| 학회 |
한국화학공학회 |
| 학술대회 |
2022년 봄 (04/20 ~ 04/23, 제주국제컨벤션센터) |
| 권호 |
28권 1호, p.79 |
| 발표분야 |
[주제 1] 계산화학 |
| 제목 |
Interface-Sensitized Chemiresistor: Integrated Conductive and Porous Metal-Organic Frameworks |
| 초록 |
Research to develop ideal sensing devices for toxic gases is on the rise, and amongst various materials, metal-organic frameworks (MOFs) have opened up promising vistas as chemiresistive sensors due to their high structural and functional tunability. Here, we report the composites of dimensionally (2D and 3D) and functionally (conductive and porous) different two MOFs in the form of a well-integrated core-shell structure. The hierarchically assembled 2D-MOF@3D-MOF exhibits new interfacial properties that are responsible for synergetically enhanced sensing performances toward toxic H2S gas with the lowest recorded limit of detection (1.4 ppb), superior sensitivity (ΔR/R0 = 3.36), and outstanding selectivity at room temperature in air. The sensing mechanisms are proposed by combinational studies of experiments and computational simulation, which indicates that multiple changes (e.g., local structural change of the shell MOF, secondary binding sites generation from the core MOF, and free radicals formation) play a critical role in achieving synergetic chemiresistive sensing. |
| 저자 |
전민규1, 조수지2, 박충성1, 이재화2, 권오민3, 김지한1, 김일두1, 문회리2
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| 소속 |
1KAIST, 2UNIST, 3Univ. of Ottawa |
| 키워드 |
열역학분자모사(Thermodynamics) |
| E-Mail |
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| 원문파일 |
초록 보기 |
