Projects per year
Abstract
Graphene is a 2D material that has been widely researched for its potential as a gas-sensing material, but its environment-sensitive electronic properties have limited its use in practical applications. In this work, a graphene chemi-resistive sensor is first integrated with a 3D-printed fused silica chamber with an internal volume of 50 microliters. The adsorption properties of graphene film are then regenerated using ultraviolet illumination. We have shown in this work that sensor response towards the target acetone sample can be regained successfully after more than 2 months of operation using UV illumination. The sensor's response at room temperature towards direct on-chip injection of acetone vapor ranging from 5 ppm to 1,000 ppm was studied and the data was linearly fitted. The wide dynamic response of the graphene sensor was used to demonstrate its usability for practical soil testing applications. We successfully detected 11 ppm, 20 ppm and ∼605ppm of acetone vapor in artificially spiked soil samples. In conclusion, our new on-chip integrated gas chamber is extremely robust, provides repeatable results after long-term operation, and offers a direct route for on-chip sample injection.
Original language | English |
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Article number | 100510 |
Number of pages | 8 |
Journal | Flatchem |
Volume | 40 |
Early online date | 21 May 2023 |
DOIs | |
Publication status | Published - Jul 2023 |
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R1820ECS: Queen's University Belfast Core Equipment Call 2022
Johnson, C. (PI), Shakeel, H. (CoI) & Woods, R. (CoI)
11/01/2023 → …
Project: Research
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R3201ECI: EPMD: Enabling next generation integrated optoelectronics with free-form metamaterials based on graphene
Shakeel, H. (PI)
21/01/2020 → 30/11/2023
Project: Research
Student theses
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Design and fabrication of highly sensitive graphene-based sensors for environmental and health monitoring applications
Ann Jose, S. (Author), McNeill, D. (Supervisor) & Shakeel, H. (Supervisor), Jul 2024Student thesis: Doctoral Thesis › Doctor of Philosophy
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Future glass factory: precision shaping of glass using amorphous silica nanocomposite prepolymer and replication molding
Atwa, Y. A. (Author), Shakeel, H. (Supervisor) & McNeill, D. (Supervisor), Jul 2025Student thesis: Doctoral Thesis › Doctor of Philosophy
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Helium plasma based gas detectors for volatile organic compounds
Mao, J. (Author), McNeill, D. (Supervisor) & Shakeel, H. (Supervisor), Dec 2024Student thesis: Doctoral Thesis › Doctor of Philosophy
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Research output
- 8 Citations
- 1 Conference contribution
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Printable fused silica based microchamber integrated with graphene chemi-resistive sensors for direct on-chip soil testing
Ann Jose, S., Atwa, Y., Mitchell, N. & Shakeel, H., 17 Apr 2023, Proceedings of the IEEE Applied Sensing Conference, APSCON 2023. Institute of Electrical and Electronics Engineers Inc., 3 p. (IEEE Applied Sensing Conference (APSCON): Proceedings).Research output: Chapter in Book/Report/Conference proceeding › Conference contribution