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Spectroelectrochemical Measurements at Colloidal Au Multilayer Optically Transparent Electrodes
Author(s) -
Richardson John N.,
Osisek Andrea J.,
Dyer Aubrey L.
Publication year - 2003
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.200302741
Subject(s) - electrode , materials science , colloid , surface roughness , scanning electron microscope , electrochemistry , surface finish , thin film , analytical chemistry (journal) , nanotechnology , optoelectronics , chemical engineering , chemistry , composite material , chromatography , engineering
Application of thin colloidal Au multilayers on glass substrates as optically transparent electrodes is reported herein. Evaluation of the electrode by scanning electron microscopy and as an optically transparent thin layer electrode (OTTLE) illustrate its use for spectroelectrochemical applications. A spectroelectrochemical Nernst plot acquired for the oxidation of o ‐tolidine yielded a value of E °=0.605 V ( vs. Ag/AgCl) and n =1.88. Both of these values are in excellent agreement with previously published values obtained using a traditional Au minigrid OTTLE. The colloidal Au multilayer electrode is expected to offer many advantages over the minigrid OTTLE in specific applications. These advantages include direct control over microscopic surface topography, large electrochemical surface area, applicability to many different electrode geometries, and increased microscopic surface roughness for SERS and SPR applications.