Chemiresistive Carbon Nanotube Sensors for N-Nitrosodialkylamines.
Maggie HeRobert G CroyJohn M EssigmannTimothy M SwagerPublished in: ACS sensors (2019)
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.
Keyphrases
- carbon nanotubes
- particulate matter
- low cost
- label free
- air pollution
- human health
- loop mediated isothermal amplification
- real time pcr
- health risk
- risk assessment
- gold nanoparticles
- healthcare
- social media
- health information
- drinking water
- single molecule
- quantum dots
- capillary electrophoresis
- high resolution
- reduced graphene oxide
- life cycle
- tandem mass spectrometry