Contact Interface of Graphene Sensors

Gas sensors come in various types, including chemiresistive, infrared, photoionization, and semiconductor sensors. Each type leverages a distinct physical phenomenon. For carbon-based sensors, they can function under two primary categories. Graphene-metal contacts are crucial because they significantly impact the performance of carbon-based sensors. The geometry of these contacts plays a vital role in determining the sensor's effectiveness. The contact geometry affects how charge carriers are transferred between the graphene and the metal, which in turn influences the sensor's sensitivity, response time, and overall efficiency. Optimal contact geometry can minimize resistance and maximize the active sensing area, thereby enhancing the detection capabilities and reliability of the sensors.