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Spectral Characteristics of Noble Metal Nanoparticle–Molybdenum Disulfide Heterostructures
Author(s) -
Forcherio Gregory T.,
Roper D. Keith
Publication year - 2016
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.201600219
Subject(s) - materials science , molybdenum disulfide , surface plasmon resonance , nanoparticle , exciton , noble metal , resonance (particle physics) , plasmon , dipole , monolayer , optoelectronics , localized surface plasmon , molecular physics , condensed matter physics , nanotechnology , atomic physics , metal , chemistry , metallurgy , physics , organic chemistry
Energy and damping of resonances which occur in spectra of monolayer molybdenum disulfide (MoS 2 ) decorated by noble metal nanospheres and prisms are examined by comparing discrete dipole approximation (DDA) simulations and transmission UV–vis measurements. Localized surface plasmon resonance (LSPR) as well as A and B exciton transitions of the semiconductor are characterized individually and in tandem on a silica substrate. Extinction energies for LSPR and direct bandgap transition of MoS 2 estimated by DDA are within 2% of measured values for gold nanospheres and silver nanoprisms. Resonant near‐fields mapped at nanoparticle–MoS 2 interfaces show plasmon damping via energy dissipation to the MoS 2 and direct bandgap excitation. Linewidth analysis of resonant far‐field damping estimates energy transfer efficiencies for putative hot electron transfer, corroborated by experiment. Use of DDA simulations to characterize and inform induction and damping of electric resonance modes in nanoparticle–MoS 2 heterostructures is illustrated.