Exploring copper nanostructures as highly uniform and reproducible substrates for plasmon-enhanced fluorescence
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2015-01-01
Autores
Volpati, D. [UNESP]
Spada, E. R.
Pla Cid, C. C.
Sartorelli, M. L.
Aroca, R. F.
Constantino, C. J. L. [UNESP]
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Royal Soc Chemistry
Resumo
The unique properties of metallic nanostructures of coinage metals that can sustain localized surface plasmon resonances (LSPR) put them at the centre of plasmon-enhanced phenomena. The theory of plasmonic phenomena based on LSPR is well-established. However, the fabrication of plasmonic substrates, reproducibly, is still challenging for applications in surface-enhanced Raman scattering (SERS) and surface-enhanced fluorescence (SEF). In this work we describe well-ordered copper nanostructures (CuNSs), produced by electrodeposition and nanosphere lithography, as active substrates for SEF. After a detailed spectroscopic and microscopic characterization, CuNSs are successfully applied as SEF-active substrates using a well-known perylene derivative as a target molecule. The signal reproducibility from CuNS substrates was established by comparing the results against those obtained from a simply roughened Cu substrate. Under optimal conditions, signal variability is around 4%.
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Analyst. Cambridge: Royal Soc Chemistry, v. 140, n. 2, p. 476-482, 2015.