New York University
Harnessing structural imperfection in layered 2D materials for device applications
Over the past decade, layered two-dimensional materials, from graphene to transition metal dichalcogenides (TMDs), have provided an exciting experimental platform for exploring quantum many-body physics. The key features of such systems include strong spin-orbit coupling, a tunable bandgap and the ability to create exotic van der Waals heterostructures. The success of those basic science experiments depends on how perfect these systems are. However, structural imperfections in these 2D materials can also give rise to interesting physical effects. In this talk, I will describe two examples from our recent work that seek to exploit the structural imperfection in TMDs and graphene for device applications. First, we will show how defect engineering in graphene can lead to superior sensors for real time detection of neurochemical molecules. Second, I will describe how we manipulate the structural imperfections in synthetic TMDs for creating new physically unclonable security primitives. Our results open doors for a new generation of devices by harnessing the structural imperfection in layered 2D materials.