Layer-by-layer assembled dual-ligand conductive MOF nano-films with modulated chemiresistive sensitivity and selectivity

• 作者: Ai-Qian Wu Wen-Qing Wang Hong-Bin Zhan Lin-An Cao Xiao-Liang Ye Jia-Jia Zheng Pendyala Naresh Kumar Kashi Chiranjeevulu Wei-Hua Deng Guan-E Wang Ming-Shui Yao Gang Xu
• 来源期刊: 纳米研究（英文版）
• 年，卷（期）: 2021,（2）
• 所属期刊栏目: Research Articles
• 页码范围: 438-443
• 页数: 6页
• 语种: 英文

摘要

In this paper,a dual-ligand design strategy is demonstrated to modulate the performance of the electronically conductive metal-organic 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.