1. Chemiresistive Carbon Nanotube Sensors for N -Nitrosodialkylamines.
- Author
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He M, Croy RG, Essigmann JM, and Swager TM
- Subjects
- Air Pollutants chemistry, Carcinogens chemistry, Cobalt chemistry, Metalloporphyrins chemistry, Nitrosamines chemistry, Air Pollutants analysis, Carcinogens analysis, Nanotubes, Carbon chemistry, Nitrosamines analysis
- Abstract
N -Nitrosamines are environmental genotoxicants that are widely encountered in air, water, and food. Contamination of indoor and outdoor air with N -nitrosamines has been reported on many occasions. Conventional detection of airborne N -nitrosamines requires sophisticated instrumentation, field sampling, and laboratory analysis. Herein, we report ultrasensitive carbon nanotube based chemiresistive sensors utilizing a cobalt(III) tetraphenylporphyrin selector element for the detection of N -nitrosamines. Concentrations as low as 1 ppb N -nitrosodimethylamine, N -nitrosodiethylamine, and N -nitrosodibutylamine were detected. We also demonstrate the integration of these sensors with a field deployable sensing node wherein the sensor response can be read online remotely.
- Published
- 2019
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