Magnetic Imaging of current flow through MXenes using Nitrogen-Vacancy centers in diamond

MXenes are a class of 2D electrically conductive materials that hold promise for advanced electronic applications. As such, understanding current flow through MXenes with high spatial resolution is critical. Thus far, experiments have only reported bulk conductance properties. We use Nitrogen-Vacancy (NV) centers in diamond to image current flow through MXenes with micron-scale spatial resolution for the first time. NV centers in diamond are sensitive to external magnetic fields, and we use them to measure magnetic fields generated from electric current flow through Ti3C2 MXenes. We reconstruct the current density from our vector magnetic field data. Using our technique, we explore the effects of different MXene terminations and geometries.