Optical property – composition correlation in noble metal alloy nanoparticles studied with EELS

Shima Kadkhodazadeh*, Ferry Anggoro Ardy Nugroho, Christoph Langhammer, Marco Beleggia, Jakob Birkedal Wagner

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Noble metals are currently the most common building blocks in plasmonics and thus define the available range of optical properties. Their alloying provides a viable strategy to engineer new materials with a tunable range of optical responses. Despite this attractive prospect, the link between composition and optical properties of many noble metal alloys is still not well understood. Here, electron energy-loss spectroscopy is employed to systematically study AuAg and AuPd nanoparticles of varying compositions. The localized surface plasmons, the bulk plasmons, and the permittivity functions of these two sets of alloys are investigated as functions of their composition. In the case of the more widely studied AuAg alloy system, good agreement is found with previous experimental and theoretical studies. The results on the less scrutinized AuPd system provide highly valuable experimental data that complements other experimental investigations and supports the development of theoretical models.
Original languageEnglish
JournalACS Photonics
Volume6
Issue number3
Pages (from-to)779–786
ISSN2330-4022
DOIs
Publication statusPublished - 2019

Keywords

  • Plasmonics
  • Alloys
  • Nanoparticles
  • Electron energy-loss spectroscopy
  • Optical properties
  • Localized surface plasmons
  • Prermittivity function

Cite this

@article{5ce48d9fee174554814745c8a1c45bac,
title = "Optical property – composition correlation in noble metal alloy nanoparticles studied with EELS",
abstract = "Noble metals are currently the most common building blocks in plasmonics and thus define the available range of optical properties. Their alloying provides a viable strategy to engineer new materials with a tunable range of optical responses. Despite this attractive prospect, the link between composition and optical properties of many noble metal alloys is still not well understood. Here, electron energy-loss spectroscopy is employed to systematically study AuAg and AuPd nanoparticles of varying compositions. The localized surface plasmons, the bulk plasmons, and the permittivity functions of these two sets of alloys are investigated as functions of their composition. In the case of the more widely studied AuAg alloy system, good agreement is found with previous experimental and theoretical studies. The results on the less scrutinized AuPd system provide highly valuable experimental data that complements other experimental investigations and supports the development of theoretical models.",
keywords = "Plasmonics, Alloys, Nanoparticles, Electron energy-loss spectroscopy, Optical properties, Localized surface plasmons, Prermittivity function",
author = "Shima Kadkhodazadeh and Nugroho, {Ferry Anggoro Ardy} and Christoph Langhammer and Marco Beleggia and Wagner, {Jakob Birkedal}",
year = "2019",
doi = "10.1021/acsphotonics.8b01791",
language = "English",
volume = "6",
pages = "779–786",
journal = "A C S Photonics",
issn = "2330-4022",
publisher = "American Chemical Society",
number = "3",

}

Optical property – composition correlation in noble metal alloy nanoparticles studied with EELS. / Kadkhodazadeh, Shima; Nugroho, Ferry Anggoro Ardy; Langhammer, Christoph; Beleggia, Marco; Wagner, Jakob Birkedal.

In: ACS Photonics, Vol. 6, No. 3, 2019, p. 779–786.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Optical property – composition correlation in noble metal alloy nanoparticles studied with EELS

AU - Kadkhodazadeh, Shima

AU - Nugroho, Ferry Anggoro Ardy

AU - Langhammer, Christoph

AU - Beleggia, Marco

AU - Wagner, Jakob Birkedal

PY - 2019

Y1 - 2019

N2 - Noble metals are currently the most common building blocks in plasmonics and thus define the available range of optical properties. Their alloying provides a viable strategy to engineer new materials with a tunable range of optical responses. Despite this attractive prospect, the link between composition and optical properties of many noble metal alloys is still not well understood. Here, electron energy-loss spectroscopy is employed to systematically study AuAg and AuPd nanoparticles of varying compositions. The localized surface plasmons, the bulk plasmons, and the permittivity functions of these two sets of alloys are investigated as functions of their composition. In the case of the more widely studied AuAg alloy system, good agreement is found with previous experimental and theoretical studies. The results on the less scrutinized AuPd system provide highly valuable experimental data that complements other experimental investigations and supports the development of theoretical models.

AB - Noble metals are currently the most common building blocks in plasmonics and thus define the available range of optical properties. Their alloying provides a viable strategy to engineer new materials with a tunable range of optical responses. Despite this attractive prospect, the link between composition and optical properties of many noble metal alloys is still not well understood. Here, electron energy-loss spectroscopy is employed to systematically study AuAg and AuPd nanoparticles of varying compositions. The localized surface plasmons, the bulk plasmons, and the permittivity functions of these two sets of alloys are investigated as functions of their composition. In the case of the more widely studied AuAg alloy system, good agreement is found with previous experimental and theoretical studies. The results on the less scrutinized AuPd system provide highly valuable experimental data that complements other experimental investigations and supports the development of theoretical models.

KW - Plasmonics

KW - Alloys

KW - Nanoparticles

KW - Electron energy-loss spectroscopy

KW - Optical properties

KW - Localized surface plasmons

KW - Prermittivity function

U2 - 10.1021/acsphotonics.8b01791

DO - 10.1021/acsphotonics.8b01791

M3 - Journal article

VL - 6

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EP - 786

JO - A C S Photonics

JF - A C S Photonics

SN - 2330-4022

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ER -