Final published version
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Covalent versus Electrostatic Strategies for Nanoparticle Immobilisation
AU - Mertens, S.F.L.
AU - Bütikofer, A.
AU - Siffert, L.
AU - Wandlowski, T.
PY - 2010
Y1 - 2010
N2 - We demonstrate that in neutral electrolytes, a polyelectrolyte-based (ω-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. © 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
AB - We demonstrate that in neutral electrolytes, a polyelectrolyte-based (ω-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. © 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
KW - 1,4-Benzenedimethanethiol
KW - Citrate
KW - Cyclic voltammetry
KW - Poly-L-lysine
KW - Self-assembly
U2 - 10.1002/elan.201000311
DO - 10.1002/elan.201000311
M3 - Journal article
VL - 22
SP - 2940
EP - 2946
JO - Electroanalysis
JF - Electroanalysis
SN - 1040-0397
IS - 24
ER -