Laser-deposited carbon aerogel derived from graphene oxide enables NO2-selective parts-per-billion gas sensing

Nufer, Sebastian, Lynch, Peter, 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 gas sensing. ACS Applied Materials and Interfaces. ISSN 1944-8244

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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 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
Schools and Departments: School of Mathematical and Physical Sciences > Physics and Astronomy
SWORD Depositor: Mx Elements Account
Depositing User: Mx Elements Account
Date Deposited: 23 Jul 2020 08:08
Last Modified: 23 Jul 2020 09:45
URI: http://sro.sussex.ac.uk/id/eprint/92711

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