On the Structural Stability of MXene and the Role of Transition Metal Adatoms

Abstract

In the present communication, the atomic structure and coordination of surface adsorbed species on Nb₂C MXene is investigated over time. In particular, the influence of the Nb adatoms on the structural stability and oxidation behavior of the MXene is addressed. This investigation is based on the plane-view geometry observations of single Nb₂C MXene sheets by a combination of atomic-resolution scanning transmission electron microscopy (STEM), electron energy loss spectroscopy (EELS) and STEM image simulations.