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National Institute of Environmental Health Sciences

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Your Environment. Your Health.

Publication Detail

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 Oct 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 Exiting the NIEHS site

MeSH Terms: Air Pollutants/analysis*; Air Pollutants/chemistry; Carcinogens/analysis*; Carcinogens/chemistry; Cobalt/chemistry; Metalloporphyrins/chemistry; Nanotubes, Carbon/chemistry*; Nitrosamines/analysis*; Nitrosamines/chemistry

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