Fluorination as Effective Method for Tuning the Electromagnetic Response of Graphene

Fluorinated graphene (FG) has been obtained by a fluorination of thermally exfoliated graphite fluoride C2F layers using a gaseous mixture of BrF3 and Br2 at room temperature. Comparative study of electromagnetic (EM) response of thin FG films after recovering their conductivity via different methods is presented in microwave (GHz) and terahertz (THz) frequency ranges. We discovered that fluorination can be used as promising tool for producing tunable EM interference (EMI) shielding materials, combining reflective and absorptive layers. Fluorographene has been obtained by thermal expansion of fluorinated graphite with a ∼C2F composition at 800 °C. Comparative study of the electromagnetic response of thin fluorographene films after recovering their conductivity via different methods is presented in the microwave and terahertz frequency ranges. The authors discovered that fluorination can be used as promising tool for producing tunable electromagnetic interference shielding materials.