Abstract:Compared to scientific publications, the funded projects offers much more valuable information, which contribute to the discovering of potential technology topics. This paper introduces text analysis and tech mining methods to analyze the National Science Foundation (NSF) funded project data, and illustrate Graphene to explore the evolution of the main research fields and the research hotspots. The results show that US researchers pay more and more attention to Electronics, Photonics, and Magnetic Devices (EPMD) field and Condensed Matter Physics (CMP) field; The emerging research topics of Graphene are mainly related to two-dimensional materials, optical properties, energy storage, topological insulators, heterostructures, surface chemistry and Graphene-based materials.