Premium
Electron Energy Loss Spectroscopy of Hot Electron Transport between Gold Nanoantennas and Molybdenum Disulfide by Plasmon Excitation
Author(s) -
Forcherio Gregory T.,
Benamara Mourad,
Roper D. Keith
Publication year - 2017
Publication title -
advanced optical materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.89
H-Index - 91
ISSN - 2195-1071
DOI - 10.1002/adom.201600572
Subject(s) - plasmon , molybdenum disulfide , materials science , electron energy loss spectroscopy , surface plasmon , electron , spectroscopy , optoelectronics , excitation , photodetection , molecular physics , nanotechnology , chemistry , transmission electron microscopy , physics , photodetector , quantum mechanics , metallurgy
Hot electron transport from single gold nanoantennas to underlying monolayer molybdenum disulfide (MoS 2 ) 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 MoS 2 are compared with calculated bandwidth contributions from radiative, nonradiative, and interfacial damping. Transport of plasmon hot electrons from 80 nm gold nanospheres to underlying MoS 2 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 MoS 2 . Hot electron transport can contribute to reported enhancements in catalysis and photodetection of MoS 2 decorated with gold nanoantennas. Improved understanding of resonant electric interactions between noble metal nanoantennas and transition metal dichalcogenides can benefit emerging optoelectronics.