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Self‐Assembly of Gold Nanoparticles/Electroactive Polyelectrolyte Multilayer Films for Tunable Electrocatalysis
Author(s) -
Liu Xiaoqing,
Wang Fuan,
Han Shuang,
Shi Lihong,
Xu Guobao
Publication year - 2010
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.200900479
Subject(s) - electrocatalyst , layer by layer , cyclic voltammetry , ascorbic acid , dielectric spectroscopy , materials science , bifunctional , nanoparticle , colloidal gold , chemical engineering , layer (electronics) , polyelectrolyte , underpotential deposition , electrode , electrochemistry , nanotechnology , inorganic chemistry , chemistry , polymer , organic chemistry , catalysis , composite material , food science , engineering
This study described fabrication, characterization, and application of multilayer films based on layer‐by‐layer assembly of ferrocene poly(ethylenimine) and gold nanoparticles. Assembly process of the multilayer film was investigated by atomic force microscopy, UV‐visible absorption spectroscopy and electrochemical impedance spectroscopy. The multilayer films exhibited a pair of well‐defined redox peaks as revealed by cyclic voltammetry, as well as bifunctional and fine‐tunable electrocatalysis for oxidation of ascorbic acid and reduction of oxygen. Both the outer layer and layer number had effect on the electrocatalytic response. Electrocatalytic activity of the films could be controlled with assemblies at the nanoscale level by simply adjusting deposition cycles or amount of component in the films.