Cargando…

Chemically Enhanced Polymer-Coated Carbon Nanotube Electronic Gas Sensor for Isopropyl Alcohol Detection

[Image: see text] Breathing-air quality within commercial airline cabins has come under increased scrutiny because of the identification of volatile organic compounds (VOCs) from the engine bleed air used to provide oxygen to cabins. Ideally, a sensor would be placed within the bleed air pipe itself...

Descripción completa

Detalles Bibliográficos
Autores principales: Ngo, Yen H., Brothers, Michael, Martin, Jennifer A., Grigsby, Claude C., Fullerton, Kathy, Naik, Rajesh R., Kim, Steve S.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2018
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6644726/
https://www.ncbi.nlm.nih.gov/pubmed/31458805
http://dx.doi.org/10.1021/acsomega.8b01039
_version_ 1783437313657798656
author Ngo, Yen H.
Brothers, Michael
Martin, Jennifer A.
Grigsby, Claude C.
Fullerton, Kathy
Naik, Rajesh R.
Kim, Steve S.
author_facet Ngo, Yen H.
Brothers, Michael
Martin, Jennifer A.
Grigsby, Claude C.
Fullerton, Kathy
Naik, Rajesh R.
Kim, Steve S.
author_sort Ngo, Yen H.
collection PubMed
description [Image: see text] Breathing-air quality within commercial airline cabins has come under increased scrutiny because of the identification of volatile organic compounds (VOCs) from the engine bleed air used to provide oxygen to cabins. Ideally, a sensor would be placed within the bleed air pipe itself, enabling detection before it permeated through and contaminated the entire cabin. Current gas-phase sensors suffer from issues with selectivity, do not have the appropriate form factor, or are too complex for commercial deployment. Here, we chose isopropyl alcohol (IPA), a main component of de-icer spray used in the aerospace community, as a target analyte: IPA exposure has been hypothesized to be a key component of aerotoxic syndrome in pre, during, and postflight. IPAs proposed mechanism of action is that of an anesthetic and central nervous system depressant. In this work, we describe IPA sensor development by showing (1) the integration of a polymer as an IPA capture matrix, (2) the adoption of a redox chemical additives as an IPA oxidizer, and (3) the application of carbon nanotubes as an electronic sensing conduit. We demonstrate the ability to not only detect IPA at 100–10 000 ppm in unfiltered, laboratory air but also discriminate among IPA, isoprene, and acetone, especially in comparison to a typical photoionization detector. Overall, we show an electronic device that operates at room temperature and responds preferentially to IPA, where the increase in the resistance corresponds directly to the concentration of IPA. Ultimately, this study opens up the pathway to selective electronic sensors that can enable real-time monitoring in a variety of environments for the force health prevention and protection, and the potential through future work to enable low parts-per-million and possibly high parts-per-billion selective detection of gas-phase VOCs of interest.
format Online
Article
Text
id pubmed-6644726
institution National Center for Biotechnology Information
language English
publishDate 2018
publisher American Chemical Society
record_format MEDLINE/PubMed
spelling pubmed-66447262019-08-27 Chemically Enhanced Polymer-Coated Carbon Nanotube Electronic Gas Sensor for Isopropyl Alcohol Detection Ngo, Yen H. Brothers, Michael Martin, Jennifer A. Grigsby, Claude C. Fullerton, Kathy Naik, Rajesh R. Kim, Steve S. ACS Omega [Image: see text] Breathing-air quality within commercial airline cabins has come under increased scrutiny because of the identification of volatile organic compounds (VOCs) from the engine bleed air used to provide oxygen to cabins. Ideally, a sensor would be placed within the bleed air pipe itself, enabling detection before it permeated through and contaminated the entire cabin. Current gas-phase sensors suffer from issues with selectivity, do not have the appropriate form factor, or are too complex for commercial deployment. Here, we chose isopropyl alcohol (IPA), a main component of de-icer spray used in the aerospace community, as a target analyte: IPA exposure has been hypothesized to be a key component of aerotoxic syndrome in pre, during, and postflight. IPAs proposed mechanism of action is that of an anesthetic and central nervous system depressant. In this work, we describe IPA sensor development by showing (1) the integration of a polymer as an IPA capture matrix, (2) the adoption of a redox chemical additives as an IPA oxidizer, and (3) the application of carbon nanotubes as an electronic sensing conduit. We demonstrate the ability to not only detect IPA at 100–10 000 ppm in unfiltered, laboratory air but also discriminate among IPA, isoprene, and acetone, especially in comparison to a typical photoionization detector. Overall, we show an electronic device that operates at room temperature and responds preferentially to IPA, where the increase in the resistance corresponds directly to the concentration of IPA. Ultimately, this study opens up the pathway to selective electronic sensors that can enable real-time monitoring in a variety of environments for the force health prevention and protection, and the potential through future work to enable low parts-per-million and possibly high parts-per-billion selective detection of gas-phase VOCs of interest. American Chemical Society 2018-06-11 /pmc/articles/PMC6644726/ /pubmed/31458805 http://dx.doi.org/10.1021/acsomega.8b01039 Text en Copyright © 2018 American Chemical Society This is an open access article published under an ACS AuthorChoice License (http://pubs.acs.org/page/policy/authorchoice_termsofuse.html) , which permits copying and redistribution of the article or any adaptations for non-commercial purposes.
spellingShingle Ngo, Yen H.
Brothers, Michael
Martin, Jennifer A.
Grigsby, Claude C.
Fullerton, Kathy
Naik, Rajesh R.
Kim, Steve S.
Chemically Enhanced Polymer-Coated Carbon Nanotube Electronic Gas Sensor for Isopropyl Alcohol Detection
title Chemically Enhanced Polymer-Coated Carbon Nanotube Electronic Gas Sensor for Isopropyl Alcohol Detection
title_full Chemically Enhanced Polymer-Coated Carbon Nanotube Electronic Gas Sensor for Isopropyl Alcohol Detection
title_fullStr Chemically Enhanced Polymer-Coated Carbon Nanotube Electronic Gas Sensor for Isopropyl Alcohol Detection
title_full_unstemmed Chemically Enhanced Polymer-Coated Carbon Nanotube Electronic Gas Sensor for Isopropyl Alcohol Detection
title_short Chemically Enhanced Polymer-Coated Carbon Nanotube Electronic Gas Sensor for Isopropyl Alcohol Detection
title_sort chemically enhanced polymer-coated carbon nanotube electronic gas sensor for isopropyl alcohol detection
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6644726/
https://www.ncbi.nlm.nih.gov/pubmed/31458805
http://dx.doi.org/10.1021/acsomega.8b01039
work_keys_str_mv AT ngoyenh chemicallyenhancedpolymercoatedcarbonnanotubeelectronicgassensorforisopropylalcoholdetection
AT brothersmichael chemicallyenhancedpolymercoatedcarbonnanotubeelectronicgassensorforisopropylalcoholdetection
AT martinjennifera chemicallyenhancedpolymercoatedcarbonnanotubeelectronicgassensorforisopropylalcoholdetection
AT grigsbyclaudec chemicallyenhancedpolymercoatedcarbonnanotubeelectronicgassensorforisopropylalcoholdetection
AT fullertonkathy chemicallyenhancedpolymercoatedcarbonnanotubeelectronicgassensorforisopropylalcoholdetection
AT naikrajeshr chemicallyenhancedpolymercoatedcarbonnanotubeelectronicgassensorforisopropylalcoholdetection
AT kimsteves chemicallyenhancedpolymercoatedcarbonnanotubeelectronicgassensorforisopropylalcoholdetection