摘要
Background: The increasing severity of air pollution has driven the demand for efficient and cost-effective NO 2 gas sensors. This report aims to develop a miniaturized NO 2 gas sensor based on polymer intercalated graphene and reduced graphene oxide and investigate their adsorption mechanisms. Methods: The 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 findings: The 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.