Graphene Applications in Sensors: Performance Optimization and Prospects

A sensor, as a detection device, is able to receive information and convert it into an electrical signal or other form of signal for output. In today's era of rapid development of intelligence, digitalization and networking, sensors have become the core tool for obtaining information. As technology advances, higher standards have been set for sensor sensitivity and application breadth. Graphene, a single-layer thin film material composed of carbon atoms arranged in a hexagonal honeycomb, has attracted much attention in the engineering industry because of its unique structure and its excellent electrical and mechanical properties. Among the many potential applications, sensors are seen as one of the most promising application areas for graphene.In this paper, the basic structural characteristics and unique properties of graphene are first outlined, and then the specific application cases in many fields such as biomedical sensors, flexible pressure sensors and photoelectric chemical sensors are discussed in detail, and the wide use of graphene materials is demonstrated by examples. At the same time, the different preparation methods of graphene are compared and analyzed, and the challenges faced by graphene sensors in the commercialization process are pointed out. Finally, a series of suggestions and prospects are put forward for the future development path of graphene sensors.