用于选择性检测硝基芳香族炸药的低聚物包覆碳纳米管化学电阻传感器。
Oligomer-coated carbon nanotube chemiresistive sensors for selective detection of nitroaromatic explosives.
作者信息
Zhang Yaqiong, Xu Miao, Bunes Benjamin R, Wu Na, Gross Dustin E, Moore Jeffrey S, Zang Ling
机构信息
†Nano Institute of Utah and Department of Materials Science and Engineering, University of Utah, Salt Lake City, Utah 84112, United States.
‡Department of Chemistry, and Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States.
出版信息
ACS Appl Mater Interfaces. 2015 Apr 15;7(14):7471-5. doi: 10.1021/acsami.5b01532. Epub 2015 Apr 1.
High-performance chemiresistive sensors were made using a porous thin film of single-walled carbon nanotubes (CNTs) coated with a carbazolylethynylene (Tg-Car) oligomer for trace vapor detection of nitroaromatic explosives. The sensors detect low concentrations of 4-nitrotoluene (NT), 2,4,6-trinitrotoluene (TNT), and 2,4-dinitrotoluene (DNT) vapors at ppb to ppt levels. The sensors also show high selectivity to NT from other common organic reagents at significantly higher vapor concentrations. Furthermore, by using Tg-Car/CNT sensors and uncoated CNT sensors in parallel, differential sensing of NT, TNT, and DNT vapors was achieved. This work provides a methodology to create selective CNT-based sensors and sensor arrays.
高性能化学电阻传感器是通过使用涂有咔唑乙炔（Tg-Car）低聚物的单壁碳纳米管（CNT）多孔薄膜制成的，用于痕量检测硝基芳香族炸药的蒸汽。这些传感器能够检测到浓度低至ppb至ppt水平的4-硝基甲苯（NT）、2,4,6-三硝基甲苯（TNT）和2,4-二硝基甲苯（DNT）蒸汽。在显著更高的蒸汽浓度下，这些传感器对NT相对于其他常见有机试剂也表现出高选择性。此外，通过并行使用Tg-Car/CNT传感器和未涂层的CNT传感器，实现了对NT、TNT和DNT蒸汽的差分传感。这项工作提供了一种创建基于CNT的选择性传感器和传感器阵列的方法。
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