On October 28th, reports indicated that MXene, a class of two-dimensional (2D) transition metal carbides, nitrides, and carbonitrides, has garnered significant attention for its utilization in supercapacitors and sensors. This is primarily due to its exceptional metallic conductivity and distinctive electrochemical interface. The performance of MXene is intricately linked to the intrinsic capacitance of the material. However, directly measuring the capacitance of a single monolayer Ti₃C₂Tₓ MXene flake poses considerable challenges. Firstly, monolayer MXene synthesized through liquid-phase methods is typically small in size, leading to extremely low effective capacitance values that are readily overshadowed by parasitic capacitance. Secondly, monolayer MXene exhibits high chemical reactivity and is susceptible to damage, rendering it incapable of withstanding conventional microfabrication processes, such as exposure to ultraviolet light or electron beams.
