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

Authors :
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
Dalton, Alan B.
Source :
ACS Applied Materials & Interfaces; September 2020, Vol. 12 Issue: 35 p39541-39548, 8p
Publication Year :
2020

Abstract

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 NO2compared 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 NO2in 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. This, in combination with its low cost and scalable production, makes it promising for Internet-of-Things air quality monitoring.

Details

Language :
English
ISSN :
19448244
Volume :
12
Issue :
35
Database :
Supplemental Index
Journal :
ACS Applied Materials & Interfaces
Publication Type :
Periodical
Accession number :
ejs53847703
Full Text :
https://doi.org/10.1021/acsami.0c09112