Functionalisation of Multi-Layer Graphene-Based Gas Sensor by Au Nanoparticles

L. Morelli, F. Ricciardella, Max Koole, Stefan Persijn, S. Vollebregt

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientific

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Abstract

A novel gas sensor based on multi-layered graphene (MLG) functionalised with gold nanoparticles (Au-NPs) is presented. We demonstrate for the first time that: (1) the signal saturates during the analyte exposure, something which does not occur in the pristine material and in graphene-based gas sensors in general; (2) the sign of the device current response is inverted. MLG is grown by chemical vapour deposition on pre-patterned CMOS-compatible Mo catalyst. The sensor is fabricated directly on the growth substrate, without any transfer of MLG. The Au-NPs are later deposited from an aerosol on the sensor at a specific controlled location, mitigating any additional patterning steps. The functionalised sensor is tested with 1 ppm (part-per-million) of NO2 at room temperature.
Original languageEnglish
Title of host publication Proceedings of 4th International Conference nanoFIS 2020 - Functional Integrated nanoSystems)
PublisherMDPI
Number of pages3
Volume56
DOIs
Publication statusPublished - 7 Dec 2020
Event4th International Conference nanoFIS 2020 - Digital Event
Duration: 2 Nov 20204 Nov 2020
Conference number: 4

Conference

Conference4th International Conference nanoFIS 2020
Period2/11/204/11/20

Keywords

  • gas sensors
  • nanoparticles
  • functionalisation
  • graphene

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