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 language | English |
---|---|
Title of host publication | Proceedings of 4th International Conference nanoFIS 2020 - Functional Integrated nanoSystems) |
Publisher | MDPI |
Number of pages | 3 |
Volume | 56 |
DOIs | |
Publication status | Published - 7 Dec 2020 |
Event | 4th International conference Functional integrated nano Systems - Digital Event Duration: 2 Nov 2020 → 4 Nov 2020 Conference number: 4 |
Conference
Conference | 4th International conference Functional integrated nano Systems |
---|---|
Abbreviated title | nanoFIS 2020 |
Period | 2/11/20 → 4/11/20 |
Keywords
- gas sensors
- nanoparticles
- functionalisation
- graphene