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Electrochemical Studies of Chemically Modified Nanometer‐Sized Electrodes
Author(s) -
Guo Jing,
Ho ChuNgi,
Sun Peng
Publication year - 2011
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.201000517
Subject(s) - electrode , electrochemistry , monolayer , nanometre , nanoparticle , platinum nanoparticles , horizontal scan rate , materials science , colloidal gold , platinum , electron transfer , self assembled monolayer , nanotechnology , analytical chemistry (journal) , chemistry , chemical engineering , cyclic voltammetry , photochemistry , composite material , catalysis , organic chemistry , engineering
Self‐assembled monolayers (SAMs) of 4‐aminothiophenol (4‐ATP) has been successfully deposited onto nanometer‐sized gold (Au) electrodes. The cyclic voltammograms obtained on a 4‐ATP SAMs modified electrode show peaks and the peak height is proportional to the scan rate, which is similar to that on an electroactive SAMs modified macro electrode. The electrochemical behavior and mechanism of outer‐sphere electron transfer reaction on the 4‐ATP SAMs modified nanometer‐sized electrode has also been studied. The 4‐ATP SAMs modified electrode is further modified with platinum (Pt) nanoparticles. Electrochemical behaviors show that there is electrical communication between Pt nanoparticles and Au metal on the Pt nanoparticles/4‐ATP SAMs/Au electrode. However, scanning electron microscopic image shows that the Pt nanoparticles are not evenly covered the electrode.