Oligomer-Coated Carbon Nanotube Chemiresistive Sensors for Selective Detection of Nitroaromatic Explosives

被引：53
|
作者：
Zhang, Yaqiong [1 ,2 ]
Xu, Miao [1 ,2 ]
Bunes, Benjamin R. [1 ,2 ]
Wu, Na [1 ,2 ]
Gross, Dustin E. [3 ,4 ]
Moore, Jeffrey S. [3 ,4 ]
Zang, Ling [1 ,2 ]
机构：
[1] Univ Utah, Nano Inst Utah, Salt Lake City, UT 84112 USA
[2] Univ Utah, Dept Mat Sci & Engn, Salt Lake City, UT 84112 USA
[3] Univ Illinois, Dept Chem, Urbana, IL 61801 USA
[4] Univ Illinois, Dept Mat Sci & Engn, Urbana, IL 61801 USA
来源：
ACS APPLIED MATERIALS & INTERFACES | 2015年 / 7卷 / 14期
基金：
美国国家科学基金会; 美国国家航空航天局;
关键词：
carbazole oligomer; carbon nanotube; thin film; chemiresistive vapor sensor; nitroaromatic explosive; differential sensing; 2,4,6-TRINITROTOLUENE; HYBRID; BLACK; GAS;
D O I：
10.1021/acsami.5b01532
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
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.
引用
收藏
页码：7471 / 7475
页数：5
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