Energy Dispersion Induced Precisely Tunable Friction of Graphitic Interface.

Precise control of friction at the nanoscale is crucial for developing efficient micro/nano-electromechanical systems. This study presents a novel approach to manipulate friction in two-dimensional materials using coupled direct current (DC) and alternating current (AC) electric fields. By applying a low-amplitude AC bias atop a DC field, friction on monolayer graphene is continuously reduced without compensating the DC bias, while preserving the integrity of the graphitic interface. Theoretical analysis through the generalized Prandtl-Tomlinson model reveals a unique energy dispersion mechanism, where vertical resonance absorbs horizontal energy, minimizing sliding friction and enhancing interfacial durability. This approach addresses limitations in conventional electrically controlled friction methods, enabling precise device manipulation and offering new insights into frictional behavior and energy transmission.