Laser-Deposited Carbon Aerogel Derived from Graphene Oxide Enables NO2Selective Parts-per-Billion Sensing [component]

unpublished
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 NO 2 compared to ammonia and other volatile organic compounds and is able to detect ultra-low concentrations down to at least 10 parts-perbillion. The sensing mechanism, based on the solubility
more » ... NO 2 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.
doi:10.1021/acsami.0c09112.s001 fatcat:ahhktnjxvnfkhbudeomjqazhni