Spectral distortions in zinc-based metal-enhanced fluorescence underpinned by fast and slow electronic transitions

Rachael Knoblauch, Hilla Ben Hamo, Robert Marks, Chris D. Geddes

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Metal-enhanced fluorescence (MEF) is a promising technology with impact in diagnostics, electronics, and sensing. Despite investigation into MEF fundamentals, some properties remain unresearched, notably spectral distortion. To date, publications have described its underpinnings, yet comprehensive analysis is needed, as presented recently for silver films. Herein we expand this description using zinc substrates (ZnNPs). Significant red-edge and blue-edge distortions are reported using Rose Bengal. Radiative decay rate modification is identified as key in amplifying fast/slow electronic transitions by the enhanced emission mechanism. Furthermore, we identify distortion in published studies, bolstering our thinking that spectral distortion is an intrinsic property of MEF.

Original languageEnglish
Article number137212
JournalChemical Physics Letters
Volume744
DOIs
StatePublished - 1 Apr 2020

Keywords

  • Metal-enhanced fluorescence
  • Plasmonic amplification
  • Radiative decay rate
  • Rose Bengal
  • Spectral distortion
  • Spectral profile modification
  • Zinc nanomaterials

ASJC Scopus subject areas

  • General Physics and Astronomy
  • Physical and Theoretical Chemistry

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