Influence of interfacial micro-nano-modulation on the electrical properties of 2D single-layer structure

The structure of graphene itself endows it with a variety of superior properties, and its surface functional modification has found wider applications in various fields. In this article, propose a simple surface modification method by applying a self-assembled FDTS monomolecular layer on the graphene surface via spin coating, which successfully changes the magnitude of its contact angle and thus affects the electrical properties. The electrical conductivity of the modified structures was then evaluated at different reaction times using a four-probe method. The introduction of this self-assembled monomolecular layer significantly reduced the original surface energy and lowered the average resistance for single-digit values. Combining this enhanced modified molecular layer with graphene successfully improves the electrical conductivity of this compound and the level of carrier mobility reaches the same level as that obtained by mechanical tearing. This surface engineering technique opens up new possibilities for the development of graphene-based electronic devices.