A graphene micro-rod resonator gas sensor with switchable selectivity
We present a gas sensor that combines functionalized graphene within a micro-rod resonator, featuring a low threshold, simple structure, easy operation, high sensitivity, and switchable selectivity. By monitoring the shift in the resonant mode due to the adsorption of gas molecules, we achieved detect limit of 1.1 ppb for NH<sub>3</sub> and CO<sub>2</sub> using a P-doped graphene-functionalized microcavity, while we demonstrated detect limit of 4 ppb for NO<sub>2</sub> by simply altering the graphene doping from P to N. Our approach highlights the advantages of low cost and flexibility, offering a promising solution for highperformance fiber-cavity architectures for chemical sensing.
Authors
- Baicheng Yao (ORCID: https://orcid.org/0000-0001-8368-5815)
- Yanhong Guo
- Shuya Yuan
- Teng Tan (ORCID: https://orcid.org/0000-0003-1820-3618)
- Yunjiang Rao (ORCID: https://orcid.org/0000-0003-0717-5586)
- Hao Zhang (ORCID: https://orcid.org/0000-0002-2373-1100)
- Guangming Zhao (ORCID: https://orcid.org/0009-0001-9086-1431)
- Fan Tang
Institutions
- University of Electronic Science and Technology of China (CN)
- Chinese Academy of Sciences (CN)
- Institute of Semiconductors (CN)
Publication Details
- Published
- 2025-05-22
- DOI
- https://doi.org/10.1117/12.3060874
- Primary Topic
- Gas Sensing Nanomaterials and Sensors
- Type
- article
- Field-Weighted Citation Impact
- 0.00