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Laser-Deposited Carbon Aerogel Derived from Graphene Oxide Enables NO2-Selective Parts-per-Billion Sensing

Nufer, Sebastian, Lynch, Peter J., Large, Matthew J., Ogilvie, Sean P., Salvage, Jonathan P., Pelaez-Fernandez, Mario, Waters, Thomas, Jurewicz, Izabela, Muñoz, Edgar, Arenal, Raul , Benito, Ana M., Maser, Wolfgang K., Tagmatarchis, Nikos, Ewels, Christopher P., Brunton, Adam and Dalton, Alan B. (2020) Laser-Deposited Carbon Aerogel Derived from Graphene Oxide Enables NO2-Selective Parts-per-Billion Sensing ACS Applied Materials & Interfaces, 12 (35). pp. 39541-39548.

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Laser-deposited carbon aerogel is a low-density porous network of carbon clusters synthesized using a laser process. A one-step synthesis, involving deposition and annealing, results in the formation of a thin porous conductive film which can be applied as a chemiresistor. This material is sensitive to NO2 compared to ammonia and other volatile organic compounds and is able to detect ultra-low concentrations down to at least 10 parts-per-billion. The sensing mechanism, based on the solubility of NO2 in the water layer adsorbed on the aerogel, increases the usability of the sensor in practically-relevant ambient environments. A heating step, achieved in tandem with a microheater, allows the recovery to the baseline making it operable in real world environments. The operability at room temperature, its low cost and scalable production makes it promising for Internet-of-Things air quality monitoring.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Physics
Authors :
Nufer, Sebastian
Lynch, Peter J.
Large, Matthew J.
Ogilvie, Sean P.
Salvage, Jonathan P.
Pelaez-Fernandez, Mario
Muñoz, Edgar
Arenal, Raul
Benito, Ana M.
Maser, Wolfgang K.
Tagmatarchis, Nikos
Ewels, Christopher P.
Brunton, Adam
Dalton, Alan B.
Date : 2 September 2020
Funders : European Union’s Horizon 2020 research and innovation programme, Marie Sklodowska-Curie
DOI : 10.1021/acsami.0c09112
Copyright Disclaimer : Copyright © 2020 American Chemical Society
Uncontrolled Keywords : Nitrogen dioxide; Gas sensor; Carbon aerogel; Selective; Chemiresistor
Depositing User : Diane Maxfield
Date Deposited : 05 Oct 2020 11:21
Last Modified : 05 Oct 2020 11:21

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