Monolayer Two-dimensional Molecular Crystals for an Ultrasensitive OFET-based Chemical Sensor |
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| Authors: | Haiyang Li Yanjun Shi Guangchao Han Prof Jie Liu Jing Zhang Chunlei Li Dr Jie Liu Prof Yuanping Yi Prof Tao Li Prof Xike Gao Prof Chongan Di Prof Jia Huang Prof Yanke Che Prof Dong Wang Prof Wenping Hu Prof Yunqi Liu Prof Lang Jiang |
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| Institution: | 1. Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Beijing, 100190 China;2. School of Chemistry and Chemical Engineering and Key Laboratory of Thin Film and Microfabrication (Ministry of Education), Shanghai Jiao Tong University, Shanghai, 200240 China;3. Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai, 200032 China;4. Interdisciplinary Materials Research Center, School of Materials Science and Engineering, Tongji University, Shanghai, 201804 China;5. Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Department of Chemistry, School of Science, Tianjin University, Tianjin, 300072 China |
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| Abstract: | The sensitivity of conventional thin-film OFET-based sensors is limited by the diffusion of analytes through bulk films and remains the central challenge in sensing technology. Now, for the first time, an ultrasensitive (sub-ppb level) sensor is reported that exploits n-type monolayer molecular crystals (MMCs) with porous two-dimensional structures. Thanks to monolayer crystal structure of NDI3HU-DTYM2 (NDI) and controlled formation of porous structure, a world-record detection limit of NH3 (0.1 ppb) was achieved. Moreover, the MMC-OFETs also enabled direct detection of solid analytes of biological amine derivatives, such as dopamine at an extremely low concentration of 500 ppb. The remarkably improved sensing performances of MMC-OFETs opens up the possibility of engineering OFETs for ultrasensitive (bio)chemical sensing. |
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| Keywords: | Monolagen-Molekülkristalle Organische Feldeffekt-Transistoren Poröse Kristalle Sensoren |
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