Abstract
Hot electron transport from single gold nanoantennas to underlying monolayer molybdenum disulfide (MoS2) is examined using electron energy loss spectroscopy (EELS). EELS allows nanometer‐scale resolution and avoids confounding effects of optical excitation. Experimental EELS measures of plasmon bandwidth in the presence and absence of MoS2 are compared with calculated bandwidth contributions from radiative, nonradiative, and interfacial damping. Transport of plasmon hot electrons from 80 nm gold nanospheres to underlying MoS2 is estimated. A 6 ± 1% hot electron transport quantum efficiency is inferred from a measured 0.08 eV increase in plasmon damping in the presence of MoS2. Hot electron transport can contribute to reported enhancements in catalysis and photodetection of MoS2 decorated with gold nanoantennas. Improved understanding of resonant electric interactions between noble metal nanoantennas and transition metal dichalcogenides can benefit emerging optoelectronics.
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