(Invited) Planar Nanoelectronic Devices and Biosensors Using Two-Dimensional Nanomaterials

The recent discovery of two-dimensional (2D) nano-materials with unique electronic properties has introduced a new platform for the realization of electronic devices. This work presents an array of nanodevices that can be realized within a single 2D monolayer, reducing the required number of processing steps and enabling extreme miniaturization and CMOS compatibility. By etching graphene down into narrow nanoribbons with controlled widths, graphene can be tuned from semi-metallic to semiconducting. Using this approach we propose a new class of all-graphene planar field effect devices that incorporate metallic as well as semiconducting graphene regions concurrently realized within a single graphene monolayer. Such Metal-Insulator-Semiconductor (MIS) based structures are used to implement different types of planar devices that can achieve rectification, Negative Differential Resistance (NDR) and tunable biosensing. We then investigate the extendibility of the proposed concept to other types of 2D nanomaterials, by implementing the proposed devices using MoS₂ and Silicene. We finally present a very promising class of planar all-graphene resonant tunneling devices that exhibit very promising performance and require minimal process steps during fabrication, while still maintaining CMOS compatibility.