Laser-Deposited Carbon Aerogel Derived from Graphene Oxide Enables NO2-Selective Parts-per-Billion SensingClick to copy article linkArticle link copied!
- Sebastian NuferSebastian NuferM-Solv Ltd, Oxonian Park, Langford Locks, Kidlington, Oxford OX5 1FP, U.K.Department of Physics and Astronomy, University of Sussex, Brighton BN1 9RH, U.K.More by Sebastian Nufer
- Peter J. LynchPeter J. LynchDepartment of Physics and Astronomy, University of Sussex, Brighton BN1 9RH, U.K.More by Peter J. Lynch
- Matthew J. LargeMatthew J. LargeDepartment of Physics and Astronomy, University of Sussex, Brighton BN1 9RH, U.K.More by Matthew J. Large
- Sean P. OgilvieSean P. OgilvieDepartment of Physics and Astronomy, University of Sussex, Brighton BN1 9RH, U.K.More by Sean P. Ogilvie
- Jonathan P. SalvageJonathan P. SalvageSchool of Pharmacy and Biomolecular Science, University of Brighton, Brighton BN2 4GJ, U.K.More by Jonathan P. Salvage
- Mario Pelaez-FernandezMario Pelaez-FernandezLaboratorio de Microscopias Avanzadas (LMA), Instituto de Nanociencia de Aragon, Universidad de Zaragoza, Zaragoza 50018, SpainMore by Mario Pelaez-Fernandez
- Thomas WatersThomas WatersDepartment of Physics, University of Surrey, Guildford GU2 7XH, U.K.More by Thomas Waters
- Izabela JurewiczIzabela JurewiczDepartment of Physics, University of Surrey, Guildford GU2 7XH, U.K.More by Izabela Jurewicz
- Edgar Muñoz
- Raul ArenalRaul ArenalFundacion ARAID, Zaragoza 50018, SpainInstituto de Ciencias de Materiales de Aragon, CSIC—Universidad de Zaragoza, Zaragoza 50009, SpainMore by Raul Arenal
- Ana M. Benito
- Wolfgang K. Maser
- Nikos TagmatarchisNikos TagmatarchisTheoretical and Physical Chemistry Institute, National Hellenic Research Foundation, Athens 11635, GreeceMore by Nikos Tagmatarchis
- Christopher P. Ewels*Christopher P. Ewels*Email: [email protected]Institute des Matériaux Jean Rouxel (IMN), CNRS UMR6502/Université de Nantes, Nantes 44322, FranceMore by Christopher P. Ewels
- Adam BruntonAdam BruntonM-Solv Ltd, Oxonian Park, Langford Locks, Kidlington, Oxford OX5 1FP, U.K.More by Adam Brunton
- Alan B. Dalton*Alan B. Dalton*Email: [email protected]Department of Physics and Astronomy, University of Sussex, Brighton BN1 9RH, U.K.More by Alan B. Dalton
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. This, in combination with its low cost and scalable production, makes it promising for Internet-of-Things air quality monitoring.
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