Functionalisation of Multi-Layer Graphene-Based Gas Sensor by Au Nanoparticles
| Autor: | Laura Morelli, Filiberto Ricciardella, Max Koole, Stefan Persijn, Sten Vollebregt |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: | |
| Zdroj: | Proceedings, Vol 56, Iss 1, p 1 (2020) |
| Druh dokumentu: | article |
| ISSN: | 20200560 2504-3900 |
| DOI: | 10.3390/proceedings2020056001 |
| Popis: | 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. |
| Databáze: | Directory of Open Access Journals |
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