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

A.L. Koh, K. Bao, I. Khan, W.E. Smith, G. Kothleitner, P. Nordlander, S.A. Maier, D.W. McComb

Research output: Contribution to journalArticle

227 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.
LanguageEnglish
Pages3015-3022
Number of pages7
JournalACS Nano
Volume3
Issue number10
DOIs
Publication statusPublished - Oct 2009

Fingerprint

Specimen preparation
Plasmons
Monochromators
Electron energy loss spectroscopy
monochromators
plasmons
Silver
Dimers
Spectrometers
Electron beams
Nanostructures
Energy dissipation
acquisition
Electron microscopes
electron microscopes
energy dissipation
silver
dimers
electron beams
spectrometers

Keywords

  • electron energy-loss spectroscopy
  • localized surface plasmon
  • silver nanoparticles
  • plasmon hybridization model
  • scanning transmission electron microscopy

Cite this

Koh, A.L. ; Bao, K. ; Khan, I. ; Smith, W.E. ; Kothleitner, G. ; Nordlander, P. ; Maier, S.A. ; McComb, D.W. / Electron energy-loss spectroscopy (EELS) of surface plasmons in single silver nanoparticles and dimers: influence of beam damage and mapping of dark modes. In: ACS Nano. 2009 ; Vol. 3, No. 10. pp. 3015-3022.
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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.",
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Electron energy-loss spectroscopy (EELS) of surface plasmons in single silver nanoparticles and dimers: influence of beam damage and mapping of dark modes. / Koh, A.L.; Bao, K.; Khan, I.; Smith, W.E.; Kothleitner, G.; Nordlander, P.; Maier, S.A.; McComb, D.W.

In: ACS Nano, Vol. 3, No. 10, 10.2009, p. 3015-3022.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Electron energy-loss spectroscopy (EELS) of surface plasmons in single silver nanoparticles and dimers: influence of beam damage and mapping of dark modes

AU - Koh, A.L.

AU - Bao, K.

AU - Khan, I.

AU - Smith, W.E.

AU - Kothleitner, G.

AU - Nordlander, P.

AU - Maier, S.A.

AU - McComb, D.W.

PY - 2009/10

Y1 - 2009/10

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 - silver nanoparticles

KW - plasmon hybridization model

KW - scanning transmission electron microscopy

UR - http://dx.doi.org/10.1021/nn900922z

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SN - 1936-0851

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