Abstract
BackgroundThe increasing severity of air pollution has driven the demand for efficient and cost-effective NO2 gas sensors. This report aims to develop a miniaturized NO2 gas sensor based on polymer intercalated graphene and reduced graphene oxide and investigate their adsorption mechanisms. MethodsThe fabrication of sensors is realized by depositing the graphene materials via a surfactant assisted two-step dipping onto laser-patterned interdigitated electrodes. The characterization of the graphene materials is carried out using various microscopic/spectroscopic techniques and the sensing performance is evaluated using a potentiostat. Significant findingsThe study reveals that the sensor based on reduced graphene oxide outperforms the graphene sensor, exhibiting a doubled response. Moreover, Langmuir adsorption isotherm also suggests the enhanced performance is attributable to the additional adsorption sites created by oxygen defects.
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