Double-layered nanoparticle stacks for spectro-electrochemical applications

Pinar Frank, Johannes Srajer, Andreas Schwaighofer, Asmorom Kibrom, Christoph Nowak

Publikation: Beitrag in FachzeitschriftArtikelBegutachtung

Abstract

Here we present a surface based on double-layered nanoparticle stacks suitable for spectro-electrochemical applications. The structure is formed on a continuous gold layer by a two-dimensional periodic array of stacks of gold and tantalum pentoxide nanodisks. Reflection spectra in the visible wavelength region showed the multiple-resonant nature of surface plasmon (SP) excitations in the nanostructure, in good agreement with simulations based on a finite-difference-time-domain method (FDTD). The multiple SP resonances can be tuned to various wavelength regions, which are required for simultaneous enhancement at excitation and emission wavelengths. Cyclic voltammetry measurements on the nanostructure proved the applicability of electrochemical methods involving interfacial redox processes
OriginalspracheEnglisch
Seiten (von - bis)3603-3605
Seitenumfang3
FachzeitschriftOptics Letters
DOIs
PublikationsstatusVeröffentlicht - 2012

Research Field

  • Biosensor Technologies

Schlagwörter

  • nanoparticle
  • spectro-electrochemical applications
  • plasmonics

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