The future ahead gas sensing with two-dimensional materials

The state of the art of the literature on two-dimensional (2D) materials currently used in conductometric and transistor-type gas sensing devices is here illustrated, followed by a survey of the potential research avenues opened by emerging 2D materials such as 2D oxides, 2D magnetic materials, and 2.5D hetero-structured and texturized materials. This Perspective also illustrates recent developments in experimental operando technique and computational methodologies that can be relevant in the field. Issues related to key performance parameters of 2D gas sensors are discussed from a perspective view against the performance of present state-of-the-art metal oxides-based gas sensing devices.