Year of Publication
Doctor of Philosophy (PhD)
Arts and Sciences
Physics and Astronomy
Dr. Douglas R. Strachan
There is a great push towards reducing the size scale of both electronic components and machines. Two dimensional materials, such as graphene, are ideal candidates towards this push, as they are naturally atomically thin. In the case of nanoscale machines, the mechanical properties of the material surfaces become increasingly important. The use of laminar materials, such as graphene and MoS2, to modify the surface properties, yet maintain nanoscale topographical features, are very attractive. Towards this goal, we have investigated the surface properties of MoS2 at the nanoscale using Lateral Force Microscopy (LFM). In these investigations, we measure periodic frictional features with periodicity of ~ 4 nm. Ultrashort devices that incorporate atomically thin components have the potential to be the smallest electronics. Such extremely scaled devices are expected to show ballistic nonlinear behavior that could make them tremendously useful for ultra fast electronic applications. We report nonlinear electron transport in ultrashort channel graphene devices. We observe this nonlinear response up to room temperature, with zero applied magnetic field, on a readily accessible oxide substrate. This makes the nanogap technology we utilize of great potential for achieving extremely scaled high-speed atomically thin devices.
Digital Object Identifier (DOI)
Boland, Mathias J., "Physical and Electronic Properties of Nanoscale 2D Materials" (2016). Theses and Dissertations--Physics and Astronomy. 39.