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- Title
A New Model and Its Application for the Dynamic Response of RGO Resistive Gas Sensor.
- Authors
Du, Hongfei; Xie, Guangzhong; Su, Yuanjie; Tai, Huiling; Du, Xiaosong; Yu, He; Zhang, Qiuping
- Abstract
An reduced graphene oxide (RGO) resistive gas sensor was prepared to detect ammonia at room temperature, the result indicated that the desorption of gas (NH 3 ) molecules from a graphene-based sensor was difficult, which lead to a baseline drift. The responses of different concentrations were compared and studied. It was found that both the response rate and its acceleration were affected by the gas concentration. An Intermolecular Forces Based Model was established to explain the adsorption and desorption dynamic response curves. A new method was proposed based on this model. The first and second derivative extrema (FSDE) of the response curve can be attained quickly to calibrate the gas concentrations. The experiment results demonstrated that this new method could eliminate the baseline drift and was capable of increasing the efficiency of gas calibration significantly.
- Subjects
GAS detectors; GRAPHENE oxide; AMMONIA; CHEMICAL reduction; INTERMOLECULAR forces
- Publication
Sensors (14248220), 2019, Vol 19, Issue 4, p889
- ISSN
1424-8220
- Publication type
Article
- DOI
10.3390/s19040889