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Laser-deposited carbon aerogel derived from graphene oxide enables NO2-selective parts-per-billion gas sensing
journal contribution
posted on 2023-06-07, 07:36 authored by Sebastian Nufer, Peter LynchPeter Lynch, Matthew LargeMatthew Large, Sean OgilvieSean Ogilvie, Jonathan P Salvage, Mario Pelaez-Fernandez, Thomas Waters, Izabela Jurewicz, Edgar Muñoz, Raul Arenal, Ana M Benito, Wolfgang K Maser, Nikos Tagmatarchis, Christopher P Ewels, Adam Brunton, Alan DaltonAlan DaltonLaser-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.
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Publication status
- Published
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- Accepted version
Journal
ACS Applied Materials and InterfacesISSN
1944-8244Publisher
American Chemical SocietyExternal DOI
Department affiliated with
- Physics and Astronomy Publications
Full text available
- Yes
Peer reviewed?
- Yes
Legacy Posted Date
2020-07-23First Open Access (FOA) Date
2021-07-23First Compliant Deposit (FCD) Date
2020-07-23Usage metrics
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