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In situ Optical Study of Gold Nanorod Coupling with Graphene
Author(s) -
Zhao Jingyi,
Cao Zhengmin,
Cheng Yuqing,
Xu Jianning,
Wen Te,
Hu Aiqin,
Gong Qihuang,
Lu Guowei
Publication year - 2018
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.201701043
Subject(s) - materials science , graphene , nanorod , photoluminescence , plasmon , laser linewidth , monolayer , quenching (fluorescence) , nanotechnology , coupling (piping) , colloidal gold , nanoparticle , spectroscopy , optoelectronics , optics , laser , composite material , fluorescence , physics , quantum mechanics
Electron or energy transfer process is critical to understand the interaction between graphene and metal nanostructures. Combining atomic force microscope nanomanipulation with single‐particle spectroscopy enables in situ investigation of the interaction between single gold nanorod and monolayer graphene. This paper reveals that scattering and photoluminescence intensity of the nanorod decreased after coupling with monolayer graphene. The coupling strength is distance dependent and different for diverse nanoparticles, resulting in intensity quenching ratio varying from 20% to 60%, and broadening of resonance linewidth varying from 18 to 38 meV. These results clarify previous controversy between ensemble studies and single‐particle measurements, and that contributes to the deeper understanding of plasmonic graphene hybrids.
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