Electron-beam mapping of plasmon resonances in electromagnetically interacting gold nanorods

Moussa N'Gom; Shuzhou Li; George Schatz; Rolf Erni; Ashish Agarwal; Nicholas Kotov; Theodore B. Norris

doi:10.1103/PhysRevB.80.113411

Electron-beam mapping of plasmon resonances in electromagnetically interacting gold nanorods

Moussa N'Gom, Shuzhou Li, George Schatz, Rolf Erni, Ashish Agarwal, Nicholas Kotov, Theodore B. Norris

Northwestern University

Research output: Contribution to journal › Article › peer-review

71 Citations (Scopus)

Abstract

Electron energy-loss spectroscopy and energy-filtered transmission electron-microscope imaging are used to characterize the energy distribution of the surface plasmon of isolated and coupled gold nanorods. Local-field enhancement and spectral shift of the plasmon modes are observed for two interacting nanoparticles. The spatial modes measured by energy loss are shown to share qualitative similarities with the electromagnetic field distribution around gold nanorods induced by optical excitation as simulated using the discrete dipole-approximation method.

Original language	English
Article number	113411
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	80
Issue number	11
DOIs	https://doi.org/10.1103/PhysRevB.80.113411
Publication status	Published - Sep 29 2009

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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Electron-beam mapping of plasmon resonances in electromagnetically interacting gold nanorods. / N'Gom, Moussa; Li, Shuzhou; Schatz, George; Erni, Rolf; Agarwal, Ashish; Kotov, Nicholas; Norris, Theodore B.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 80, No. 11, 113411, 29.09.2009.

Research output: Contribution to journal › Article › peer-review

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AB - Electron energy-loss spectroscopy and energy-filtered transmission electron-microscope imaging are used to characterize the energy distribution of the surface plasmon of isolated and coupled gold nanorods. Local-field enhancement and spectral shift of the plasmon modes are observed for two interacting nanoparticles. The spatial modes measured by energy loss are shown to share qualitative similarities with the electromagnetic field distribution around gold nanorods induced by optical excitation as simulated using the discrete dipole-approximation method.

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Electron-beam mapping of plasmon resonances in electromagnetically interacting gold nanorods

Abstract

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