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Plasmonics

, Volume 13, Issue 2, pp 437–444 | Cite as

Plasmon Responses in the Sodium Tungsten Bronzes

  • L. Tegg
  • D. Cuskelly
  • V. J. Keast
Article

Abstract

The sodium tungsten bronzes (Na x WO3) are vividly coloured metallic materials where the optical behaviour can be attributed to the bulk plasma frequency occurring in the visible part of the spectrum. A combination of density functional theory (DFT) calculations and experimental electron energy-loss spectroscopy (EELS) was used to assess their bulk and surface plasmon responses. It was observed that Na x WO3 can sustain strong localised surface plasmon resonances (LSPR) with an energy that can be tuned by changing the Na content. They have a stronger plasmonic response when compared to Au and do not suffer from the atmospheric corrosion of Ag, giving them good potential for plasmonic applications.

Keywords

Tungsten bronze Localised surface plasmon resonance Electron energy-loss spectroscopy (EELS) Density functional theory (DFT) 

Notes

Acknowledgements

This research was supported under Australian Research Council’s Discovery Projects funding scheme (Project Number DP120102545) and used equipment funded by the Australian Research Council (ARC)—Linkage, Infrastructure, Equipment and Facilities (LIEF) grant LE120100104 located at the UOW Electron Microscopy Centre. Technical support was provided by D.R.G. Mitchell is acknowledged. Mie theory calculations were performed using the ACEOS code, written by T.A. Myles.

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Copyright information

© Springer Science+Business Media New York 2017

Authors and Affiliations

  1. 1.School of Mathematical and Physical SciencesUniversity of NewcastleCallaghanAustralia
  2. 2.School of EngineeringThe University of NewcastleCallaghanAustralia

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