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10 March 2020 Monitoring hot-electron injection from single gold nanoparticles into graphene (Conference Presentation)
Marcel Weinhold, Sangam Chatterjee, Peter J. Klar
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Proceedings Volume 11288, Quantum Sensing and Nano Electronics and Photonics XVII; 112881H (2020) https://doi.org/10.1117/12.2545718
Event: SPIE OPTO, 2020, San Francisco, California, United States
Abstract
Two-dimensional layered materials like graphene pave the way to advanced (opto-) electronic devices. Their extraordinary properties can be further controlled employing plasmonic nanostructures, e.g., enhancing light focusing, increasing the absorption cross sections, and generating hot-carrier due to the excitation and decay of localized surface plasmons. However, this interplay strongly depends on the particle’s environment and geometry mandating the investigation of individual structures. Raman spectroscopy maps reveal spatially resolved information on charge transfer as well as temperature and strain distributions in graphene sheets in the vicinity of individual spherical gold nanoparticles. Hot-electrons are efficiently injected from single gold nanoparticles into graphene for resonant excitation of the localized surface plasmons of the gold nanoparticle. Additionally, heating of the graphene sheet and its intrinsic strain can be separated and quantified.
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Marcel Weinhold, Sangam Chatterjee, and Peter J. Klar "Monitoring hot-electron injection from single gold nanoparticles into graphene (Conference Presentation)", Proc. SPIE 11288, Quantum Sensing and Nano Electronics and Photonics XVII, 112881H (10 March 2020); https://doi.org/10.1117/12.2545718
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KEYWORDS
Graphene
Nanoparticles
Gold
Plasmonics
Nanostructures
Micro raman spectroscopy
Particles
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