Electron energy-loss spectroscopy (EELS) of surface plasmons in single silver nanoparticles and dimers: Influence of beam damage and mapping of dark modes

Ai Leen Koh; Kui Bao; Imran Khan; W. Ewen Smith; Gerald Kothleitner; Peter Nordlander; Stefan A. Maier; David W. Mccomb

doi:10.1021/nn900922z

Electron energy-loss spectroscopy (EELS) of surface plasmons in single silver nanoparticles and dimers: Influence of beam damage and mapping of dark modes

Ai Leen Koh, Kui Bao, Imran Khan, W. Ewen Smith, Gerald Kothleitner, Peter Nordlander, Stefan A. Maier, David W. Mccomb

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

315 Citations (Scopus)

Abstract

We demonstrate the use of a scanning transmission electron microscope (STEM) equipped with a monochromator and an electron energy loss (EEL) spectrometer as a powerful tool to study localized surface plasmons in metallic nanoparticles. We find that plasmon modes can be influenced by changes in nanostructure geometry and electron beam damage and show that it is possible to delineate the two effects through optimization of specimen preparation techniques and acquisition parameters. The results from the experimental mapping of bright and dark plasmon energies are in excellent agreement with the results from theoretical modeling.

Original language	English
Pages (from-to)	3015-3022
Number of pages	8
Journal	ACS Nano
Volume	3
Issue number	10
DOIs	https://doi.org/10.1021/nn900922z
Publication status	Published - 27 Oct 2009
Externally published	Yes

Keywords

Electron energy-loss spectroscopy
Localized surface plasmon
Plasmon hybridization model
Scanning transmission electron microscopy
Silver nanoparticles

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10.1021/nn900922z

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title = "Electron energy-loss spectroscopy (EELS) of surface plasmons in single silver nanoparticles and dimers: Influence of beam damage and mapping of dark modes",

abstract = "We demonstrate the use of a scanning transmission electron microscope (STEM) equipped with a monochromator and an electron energy loss (EEL) spectrometer as a powerful tool to study localized surface plasmons in metallic nanoparticles. We find that plasmon modes can be influenced by changes in nanostructure geometry and electron beam damage and show that it is possible to delineate the two effects through optimization of specimen preparation techniques and acquisition parameters. The results from the experimental mapping of bright and dark plasmon energies are in excellent agreement with the results from theoretical modeling.",

keywords = "Electron energy-loss spectroscopy, Localized surface plasmon, Plasmon hybridization model, Scanning transmission electron microscopy, Silver nanoparticles",

author = "Koh, {Ai Leen} and Kui Bao and Imran Khan and Smith, {W. Ewen} and Gerald Kothleitner and Peter Nordlander and Maier, {Stefan A.} and Mccomb, {David W.}",

year = "2009",

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T1 - Electron energy-loss spectroscopy (EELS) of surface plasmons in single silver nanoparticles and dimers

T2 - Influence of beam damage and mapping of dark modes

AU - Koh, Ai Leen

AU - Bao, Kui

AU - Khan, Imran

AU - Smith, W. Ewen

AU - Kothleitner, Gerald

AU - Nordlander, Peter

AU - Maier, Stefan A.

AU - Mccomb, David W.

PY - 2009/10/27

Y1 - 2009/10/27

N2 - We demonstrate the use of a scanning transmission electron microscope (STEM) equipped with a monochromator and an electron energy loss (EEL) spectrometer as a powerful tool to study localized surface plasmons in metallic nanoparticles. We find that plasmon modes can be influenced by changes in nanostructure geometry and electron beam damage and show that it is possible to delineate the two effects through optimization of specimen preparation techniques and acquisition parameters. The results from the experimental mapping of bright and dark plasmon energies are in excellent agreement with the results from theoretical modeling.

AB - We demonstrate the use of a scanning transmission electron microscope (STEM) equipped with a monochromator and an electron energy loss (EEL) spectrometer as a powerful tool to study localized surface plasmons in metallic nanoparticles. We find that plasmon modes can be influenced by changes in nanostructure geometry and electron beam damage and show that it is possible to delineate the two effects through optimization of specimen preparation techniques and acquisition parameters. The results from the experimental mapping of bright and dark plasmon energies are in excellent agreement with the results from theoretical modeling.

KW - Electron energy-loss spectroscopy

KW - Localized surface plasmon

KW - Plasmon hybridization model

KW - Scanning transmission electron microscopy

KW - Silver nanoparticles

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U2 - 10.1021/nn900922z

DO - 10.1021/nn900922z

M3 - Article

AN - SCOPUS:70350634138

SN - 1936-0851

VL - 3

SP - 3015

EP - 3022

JO - ACS Nano

JF - ACS Nano

IS - 10

ER -

Electron energy-loss spectroscopy (EELS) of surface plasmons in single silver nanoparticles and dimers: Influence of beam damage and mapping of dark modes

Abstract

Keywords

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