Merck

Double-layered nanoparticle stacks for spectro-electrochemical applications.

Optics letters (2012-09-04)
Pinar Frank, Johannes Srajer, Andreas Schwaighofer, Asmorom Kibrom, Christoph Nowak
RESUMO

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, which is in good agreement with simulations based on a finite-difference-time-domain method. 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.

MATERIAIS
Número do produto
Marca
Descrição do produto

Sigma-Aldrich
Tantalum, foil, thickness 0.05 mm, ≥99.9% trace metals basis
Sigma-Aldrich
Tantalum, nanopowder, <25 nm particle size (BET), ≥99% trace metals basis
Sigma-Aldrich
Tantalum, powder, −325 mesh, 99.9% trace metals basis
Sigma-Aldrich
Tantalum, powder, 60-100 mesh, 99.9%
Sigma-Aldrich
Potassium ferricyanide(III), powder or chunks, <10 μm, 99%
Sigma-Aldrich
Tantalum, wire, diam. 0.5 mm, ≥99.9% trace metals basis
Sigma-Aldrich
Potassium hexacyanoferrate(III), 99.98% trace metals basis
Sigma-Aldrich
Tantalum, foil, thickness 0.5 mm, ≥99.9% trace metals basis
Sigma-Aldrich
Tantalum, foil, thickness 0.025 mm, ≥99.9% trace metals basis
Sigma-Aldrich
Tantalum, foil, thickness 0.25 mm, ≥99.9% trace metals basis
Sigma-Aldrich
Tantalum, foil, thickness 1.0 mm, ≥99.9% trace metals basis
Sigma-Aldrich
Tantalum, powder, 99.99% trace metals basis
Sigma-Aldrich
Tantalum, rod, diam. 6.35 mm, ≥99.9% trace metals basis
Sigma-Aldrich
Tantalum, wire, diam. 1.0 mm, ≥99.9% trace metals basis
Sigma-Aldrich
Potassium hexacyanoferrate(III), BioUltra, ≥99.0% (RT)
Sigma-Aldrich
Potassium hexacyanoferrate(III), ACS reagent, ≥99.0%
Sigma-Aldrich
Potassium hexacyanoferrate(III), ReagentPlus®, ~99%
Sigma-Aldrich
Potassium hexacyanoferrate(III), puriss. p.a., ACS reagent, reag. ISO, reag. Ph. Eur., ≥99%