Synthesis and characterization of two-dimensional Nb<sub>4</sub>C<sub>3</sub> (MXene)
By etching Nb<sub>4</sub>AlC<sub>3</sub> powders in hydrofluoric acid, a phase-pure, highly conductive, Nb<sub>4</sub>C<sub>3</sub> MXene – the second with formula M<sub>4</sub>...