Two dimensional atomically thin MoS sub(2) nanosheets and their sensing applications

The extraordinary properties of layered graphene and its successful applications in electronics, sensors, and energy devices have inspired and renewed interest in other two-dimensional (2D) layered materials. Particularly, a semiconducting analogue of graphene, molybdenum disulfide (MoS sub(2)), has attracted huge attention in the last few years. With efforts in exfoliation and synthetic techniques, atomically thin films of MoS sub(2) (single- and few-layer) have been recently prepared and characterized. 2D MoS sub(2) nanosheets have properties that are distinct and complementary to those of graphene, making it more appealing for various applications. Unlike graphene with an indirect bandgap, the direct bandgap of single-layer MoS sub(2) results in better semiconductor behavior as well as photoluminescence, suggesting its great suitability for electronic and optoelectronic applications. Compared to their applications in energy storage and optoelectronic devices, the use of MoS sub(2) nanosheets as a sensing platform, especially for biosensing, is still largely unexplored. Here, we present a review of the preparation of 2D atomically thin MoS sub(2) nanosheets, with an emphasis on their use in various sensing applications.