Oligomer-coated carbon nanotube chemiresistive sensors for selective detection of nitroaromatic explosives

Yaqiong Zhang; Miao Xu; Benjamin R. Bunes; Na Wu; Dustin E. Gross; Jeffrey S. Moore; Ling Zang

doi:10.1021/acsami.5b01532

Oligomer-coated carbon nanotube chemiresistive sensors for selective detection of nitroaromatic explosives

Yaqiong Zhang, Miao Xu, Benjamin R. Bunes, Na Wu, Dustin E. Gross, Jeffrey S. Moore, Ling Zang

Research output: Contribution to journal › Article › peer-review

Abstract

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.

Original language	English (US)
Pages (from-to)	7471-7475
Number of pages	5
Journal	ACS Applied Materials and Interfaces
Volume	7
Issue number	14
DOIs	https://doi.org/10.1021/acsami.5b01532
State	Published - Apr 15 2015

Keywords

carbazole oligomer
carbon nanotube
chemiresistive vapor sensor
differential sensing
nitroaromatic explosive
thin film

ASJC Scopus subject areas

Materials Science(all)

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10.1021/acsami.5b01532

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@article{20672720ff204e62b28d45845ed8a58c,

title = "Oligomer-coated carbon nanotube chemiresistive sensors for selective detection of nitroaromatic explosives",

abstract = "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.",

keywords = "carbazole oligomer, carbon nanotube, chemiresistive vapor sensor, differential sensing, nitroaromatic explosive, thin film",

author = "Yaqiong Zhang and Miao Xu and Bunes, {Benjamin R.} and Na Wu and Gross, {Dustin E.} and Moore, {Jeffrey S.} and Ling Zang",

year = "2015",

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AU - Zhang, Yaqiong

AU - Xu, Miao

AU - Bunes, Benjamin R.

AU - Wu, Na

AU - Gross, Dustin E.

AU - Moore, Jeffrey S.

AU - Zang, Ling

PY - 2015/4/15

Y1 - 2015/4/15

N2 - 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.

AB - 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.

KW - carbazole oligomer

KW - carbon nanotube

KW - chemiresistive vapor sensor

KW - differential sensing

KW - nitroaromatic explosive

KW - thin film

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