Title: Chemiresistive Carbon Nanotube Sensors for N-Nitrosodialkylamines.
Authors: He, Maggie; Croy, Robert G; Essigmann, John M; Swager, Timothy M
Published In ACS Sens, (2019 10 25)
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.
PubMed ID: 31573183
MeSH Terms: Air Pollutants/analysis*; Air Pollutants/chemistry; Carcinogens/analysis*; Carcinogens/chemistry; Cobalt/chemistry; Metalloporphyrins/chemistry; Nanotubes, Carbon/chemistry*; Nitrosamines/analysis*; Nitrosamines/chemistry