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

页码：7471 / 7475

页数：5

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