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

[Display omitted] •Zinc nanoparticulate films yield spectral distortion in Metal-Enhanced Fluorescence.•Both red edge and blue edge distortions are observed from Rose Bengal emission.•Favored enhancement of slow (red) and fast (blue) transitions causes distortion. Metal-enhanced fluorescence (MEF) i...

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Bibliographic Details
Published in:Chemical physics letters 2020-04, Vol.744, p.137212, Article 137212
Main Authors: Knoblauch, Rachael, Ben Hamo, Hilla, Marks, Robert, Geddes, Chris D.
Format: Article
Language:English
Subjects:
Metal-enhanced fluorescence
Plasmonic amplification
Radiative decay rate
Rose Bengal
Spectral distortion
Spectral profile modification
Zinc nanomaterials
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Summary:[Display omitted] •Zinc nanoparticulate films yield spectral distortion in Metal-Enhanced Fluorescence.•Both red edge and blue edge distortions are observed from Rose Bengal emission.•Favored enhancement of slow (red) and fast (blue) transitions causes distortion. 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.
ISSN:0009-2614
1873-4448
DOI:10.1016/j.cplett.2020.137212