Abstract
Graphene and graphene-like 2D layered materials such as transition metal dichalcogenides (MoS2, WS2, etc.) have attracted tremendous scientific and technological research interest over the last one and half decade. These materials offer excellent possibilities for developing ultra-sensitive sensors due to their unique properties such as high carrier mobilities, tuneable electronic structure, high surface to volume ratios and ease of functionalization. Hybrid structures consisting of different layers of 2D materials can lead to superior device performance and capabilities. Over the last few years, using NorFab facilities, we have developed an expertise in assembly of 2D material heterostructures and in fabrication of devices based on such materials that can be used for various sensing applications including gas detection. We have demonstrated the potential of hBN/MoS2 devices to detect ultra-low concentrations of gases (in the low ppb level), which will be the main focus of the presentation.