Facile depositing strategy to fabricate a hetero-affinity hybrid film for improving gas-sensing performance
- 1 February 2021
- journal article
- research article
- Published by IOP Publishing in Nanotechnology
- Vol. 32 (20), 205502
- https://doi.org/10.1088/1361-6528/abe1ee
Abstract
A novel co-spray method was proposed to fabricate a reduced graphene oxide (rGO)-poly (3-hexylthiophene) (P3HT) hybrid sensing device utilizing immiscible solution for ammonia detection at room temperature. The spectrum and Scanning Electron Microscopy (SEM) results revealed uniformly crimped morphology and favorable π-π interaction for the hybrid film. The hybrid film-based sensor showed obviously enhanced ammonia sensing performance, such as increased response, reduced response time, and reinforced sensitivity, in comparison to bare rGO, P3HT, and traditional rGO/P3HT layered film-based sensors, which could be attributed to an adsorption energy barrier and the p-n heterojunction effect. The synergetic strengthened sensing mechanism is discussed. Meanwhile, recovery ratio was introduced to evaluate the abnormal baseline drift induced high-response behavior. The excellent sensing properties of the hybrid sensor indicate that the co-spray method could be an alternative process for the preparation of hetero-affinity hybrid films or functional devices.Keywords
Funding Information
- China Postdoctoral Science Foundation (2019M663487)
- Fundamental Research Funds for the Central Universities (2019SCU12072)
- National Natural Science Foundation of China (11905151)
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