The discovery of graphene generated much interest in the unique properties of 2D layered materials. Reducing thickness to single or few layers produces optical and electronic properties dramatically different from those in the bulk. Sample morphology (layer count, edge features, lateral size, etc.) also strongly affects material properties. Photoluminescence (PL) spectroscopy is a sensitive technique for studying these properties. Spatially resolved PL imaging enables the correlation of optical emission to morphology of individual nanostructures. In this project, I have established and characterized a spatially resolved PL setup that allows studying the optical emission of single 2D nanostructures. As an example, I have studied the optical emission of single-layered MoS2 nanosheets.
Worcester Polytechnic Institute
Major Qualifying Project
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