Novel 2D-Inorganic Materials for Gas Sensing

Nowadays, modern technology is demanding more efficient gas sensors for advanced applications [1]. Consequently, there is a considerable effort towards the goal of high performance gas sensors based on novel sensing materials. Since the first report of graphene, thin two-dimensional (2D) inorganic nanomaterials with atomic or molecular thicknesses have attracted great research interest for gas sensing applications [2], and gas sensors based on these 2D-materials have been used for a wide range of applications [3]. This was due to the distinctive physical, chemical and electronic properties related to their ultrathin thickness, which positively affect the gas sensor performances. The unique properties (e.g., ultra-thin structure, large surface area and tunable energy band diagrams) of novel 2D-inorganic materials (ZnO, MoS2, SnS2, WS2, etc.) have, so far, led to immense research regarding this material’s fundamentals, applications and, more recently, its potential for gas sensing [4]. In this Special Issue, a number of reviews and original papers report the latest results and recent advances in the research and development of thin 2D-inorganic nanomaterials for applications in this field. All aspects related to the preparation methods, sensing principle and mechanism, as well as technological aspects and applications have been covered.