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Layer-by-layer assembled dual-ligand conductive MOF nano-films with modulated chemiresistive sensitivity and selectivity |
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| Authors: | Wu Ai-Qian Wang Wen-Qing Zhan Hong-Bin Cao Lin-An Ye Xiao-Liang Zheng Jia-Jia Kumar Pendyala Naresh Chiranjeevulu Kashi Deng Wei-Hua Wang Guan-E Yao Ming-Shui Xu Gang |
| Affiliation: | 1.College of Materials Science and Engineering, Fuzhou University, Fuzhou, 350108, China ;2.State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, China ;3.Institute for Integrated Cell-Material Sciences (WPI-iCeMS), Kyoto University Institute for Advanced Study, Kyoto University, Yoshida Ushinomiya-cho, Sakyo-ku, Kyoto, 606-8501, Japan ; |
| Abstract: | In this paper, a dual-ligand design strategy is demonstrated to modulate the performance of the electronically conductive metalorganic frameworks (EC-MOFs) thin film with a spray layer-by-layer assembly method. The thin film not only can be precisely prepared in nanometer scale (20–70 nm), but also shows the pin-hole-free smooth surface. The high quality nano-film of 2,3,6,7,10,11-hexaiminotriphenylene (HITP) doped Cu-HHTP enables the precise modulation of the chemiresistive sensitivity and selectivity. Selectivity improvement over 220% were realized for benzene vs. NH3, as well as enhanced response and recovery properties. In addition, the selectivity of the EC-MOF thin film sensors toward other gases (e.g. triethylamine, methane, ethylbenzene, hydrogen, butanone, and acetone) vs. NH3 at room temperature is also discussed.  |
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