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タイトル: | Non–contact real–time detection of trace nitro-explosives by MOF composites visible–light chemiresistor |
著者: | Deng, Wei-Hua Yao, Ming-Shui Zhang, Min-Yi Tsujimoto, Masahiko Otake, Kenichi Wang, Bo Li, Chun-Sen Xu, Gang Kitagawa, Susumu |
著者名の別形: | 辻本, 将彦 大竹, 研一 北川, 進 |
キーワード: | MOFs metal oxides electrical devices thin films gas sensors |
発行日: | Oct-2022 |
出版者: | Oxford University Press (OUP) |
誌名: | National Science Review |
巻: | 9 |
号: | 10 |
論文番号: | nwac143 |
抄録: | To create an artificial structure to remarkably surpass the sensitivity, selectivity and speed of the olfaction system of animals is still a daunting challenge. Herein, we propose a core-sheath pillar (CSP) architecture with a perfect synergistic interface that effectively integrates the advantages of metal–organic frameworks and metal oxides to tackle the above-mentioned challenge. The sheath material, NH₂-MIL-125, can concentrate target analyte, nitro-explosives, by 10¹² times from its vapour. The perfect band-matched synergistic interface enables the TiO₂ core to effectively harvest and utilize visible light. At room temperature and under visible light, CSP (TiO₂, NH₂-MIL-125) shows an unexpected self-promoting analyte-sensing behaviour. Its experimentally reached limit of detection (~0.8 ppq, hexogeon) is 10³ times lower than the lowest one achieved by a sniffer dog or all sensing techniques without analyte pre-concentration. Moreover, the sensor exhibits excellent selectivity against commonly existing interferences, with a short response time of 0.14 min. |
著作権等: | © The Author(s) 2022. Published by Oxford University Press on behalf of China Science Publishing & Media Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited. |
URI: | http://hdl.handle.net/2433/276720 |
DOI(出版社版): | 10.1093/nsr/nwac143 |
PubMed ID: | 36196111 |
出現コレクション: | 学術雑誌掲載論文等 |
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