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Adsorbed molecules can significantly affect the properties of atomically thin materials. Physisorbed water plays a significant role in altering the optoelectronic properties of single‐layer MoS2, one such 2D film. Here the distinct quenching effect of adsorbed water on the photoluminescence of single‐layer MoS2 is demonstrated through scanning‐probe and optical microscopy.
A scanning probe image of single‐layer MoS2 trapping water on a mica surface is depicted on the left, with its corresponding photoluminescence image depicted on the right. The trapped water strongly quenches the fluorescence of single‐layer MoS2 and distinctly affects its optical properties. The work by J. R. Heath and co‐workers on page 2734 highlights the significance of the local chemical environment...
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