Localized plasmon resonances of bimetallic AgAuAg nanorods

Sung Hyun Ahn; Deok Soo Kim; Daeha Seo; Wonjun Choi; Gi Ra Yi; Hyunjoon Song; Q. Han Park; Zee Hwan Kim

doi:10.1039/c2cp43365f

Localized plasmon resonances of bimetallic AgAuAg nanorods

Sung Hyun Ahn, Deok Soo Kim, Daeha Seo, Wonjun Choi, Gi Ra Yi, Hyunjoon Song, Q. Han Park, Zee Hwan Kim

Department of Physics

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

11 Citations (Scopus)

Abstract

We investigated the localized surface plasmon resonances of individual AgAuAg nanorods (NRs) using the dark-field spectro-microscopy technique. We find that the scattering spectra of such hetero-NRs show longitudinal resonance wavelengths that are nearly insensitive to the relative composition of Ag and Au. Instead, the resonance is mostly governed by the overall length of the nanorod. This shows that the plasmons oscillate along the entire length of the NR without the significant perturbation at the Ag-Au interfaces. The results demonstrate that the overall geometry as well as the composition determine the tunability of the hetero-metallic nanostructures, and provide an important design rule for the composition-tunable bimetallic plasmon structures.

Original language	English
Pages (from-to)	4190-4194
Number of pages	5
Journal	Physical Chemistry Chemical Physics
Volume	15
Issue number	12
DOIs	https://doi.org/10.1039/c2cp43365f
Publication status	Published - 2013 Mar 28

ASJC Scopus subject areas

Physics and Astronomy(all)
Physical and Theoretical Chemistry

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title = "Localized plasmon resonances of bimetallic AgAuAg nanorods",

abstract = "We investigated the localized surface plasmon resonances of individual AgAuAg nanorods (NRs) using the dark-field spectro-microscopy technique. We find that the scattering spectra of such hetero-NRs show longitudinal resonance wavelengths that are nearly insensitive to the relative composition of Ag and Au. Instead, the resonance is mostly governed by the overall length of the nanorod. This shows that the plasmons oscillate along the entire length of the NR without the significant perturbation at the Ag-Au interfaces. The results demonstrate that the overall geometry as well as the composition determine the tunability of the hetero-metallic nanostructures, and provide an important design rule for the composition-tunable bimetallic plasmon structures.",

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AU - Ahn, Sung Hyun

AU - Kim, Deok Soo

AU - Seo, Daeha

AU - Choi, Wonjun

AU - Yi, Gi Ra

AU - Song, Hyunjoon

AU - Park, Q. Han

AU - Kim, Zee Hwan

PY - 2013/3/28

Y1 - 2013/3/28

N2 - We investigated the localized surface plasmon resonances of individual AgAuAg nanorods (NRs) using the dark-field spectro-microscopy technique. We find that the scattering spectra of such hetero-NRs show longitudinal resonance wavelengths that are nearly insensitive to the relative composition of Ag and Au. Instead, the resonance is mostly governed by the overall length of the nanorod. This shows that the plasmons oscillate along the entire length of the NR without the significant perturbation at the Ag-Au interfaces. The results demonstrate that the overall geometry as well as the composition determine the tunability of the hetero-metallic nanostructures, and provide an important design rule for the composition-tunable bimetallic plasmon structures.

AB - We investigated the localized surface plasmon resonances of individual AgAuAg nanorods (NRs) using the dark-field spectro-microscopy technique. We find that the scattering spectra of such hetero-NRs show longitudinal resonance wavelengths that are nearly insensitive to the relative composition of Ag and Au. Instead, the resonance is mostly governed by the overall length of the nanorod. This shows that the plasmons oscillate along the entire length of the NR without the significant perturbation at the Ag-Au interfaces. The results demonstrate that the overall geometry as well as the composition determine the tunability of the hetero-metallic nanostructures, and provide an important design rule for the composition-tunable bimetallic plasmon structures.

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Localized plasmon resonances of bimetallic AgAuAg nanorods

Abstract

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