TY - JOUR
T1 - Oligomer-coated carbon nanotube chemiresistive sensors for selective detection of nitroaromatic explosives
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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U2 - 10.1021/acsami.5b01532
DO - 10.1021/acsami.5b01532
M3 - Article
C2 - 25823968
AN - SCOPUS:84927942191
VL - 7
SP - 7471
EP - 7475
JO - ACS applied materials & interfaces
JF - ACS applied materials & interfaces
SN - 1944-8244
IS - 14
ER -