Synthesis of Two-Dimensional Titanium Nitride Ti4N3 (MXene)

This chapter reports on the synthesis of the first two-dimensional transition metal nitride, Ti4N3-based MXene. It delaminates the resulting MXene to produce few-layered nanosheets and monolayers of Ti4N3Tx, where T is a surface termination. The family of two-dimensional materials—solids with high aspect ratios and thicknesses of a few atomic layers—has grown far beyond graphene. Nitride MXenes have several potential advantages over their carbide counterparts. Transition metal nitrides are known to have higher electronic conductivities than carbides, they are therefore suitable candidates for electrodes in electrochemical capacitors. The oscillation modes of certain symmetry groups of Ti4AlN3 are labeled after fitting the spectra with products of Gaussian and Lorentzian functions.