Title: Covalent versus Electrostatic Strategies for Nanoparticle Immobilisation
Authors: Mertens, Stijn F. L ×
Buetikofer, Angela
Siffert, Luca
Wandlowski, Thomas #
Issue Date: Dec-2010
Publisher: Wiley-VCH
Series Title: Electroanalysis vol:22 issue:24 pages:2940-2946
Abstract: We demonstrate that in neutral electrolytes, a polyelectrolyte-based (w-mercaptoacid/ poly-l-lysine) immobilisation strategy for as-prepared electrostatically stabilised metal nanoparticles is a powerful alternative to often difficult to control dithiol approaches. Our data confirm straightforward preparation of high-coverage nanoparticle electrodes with fast kinetics and an electrochemical window of up to 1.5 V even in unbuffered solutions, under both stationary and hydrodynamic conditions. The stability region is limited by reductive desorption of the mercaptocarboxylic acid at negative potentials, and by nanoparticle oxidation at positive potentials. The electrostatic immobilisation is valuable for the study of electroanalytical and electrocatalytic processes using nanoparticulate electrode materials.
ISSN: 1040-0397
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Non-KU Leuven Association publications
× corresponding author
# (joint) last author

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