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Chronoamperometric and Voltammetric Characterization of Gold Ultramicroelectrode Arrays
Author(s) -
GonzálezGarcía Olga,
Ariño Cristina,
DíazCruz José Manuel,
Esteban Miquel
Publication year - 2007
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.200603727
Subject(s) - ultramicroelectrode , chronoamperometry , electrolyte , electrode , analytical chemistry (journal) , materials science , microelectrode , volumetric flow rate , characterization (materials science) , nanotechnology , cyclic voltammetry , chemistry , electrochemistry , chromatography , physics , quantum mechanics
Abstract Some prototypes of photolithographic‐built arrays of gold ultramicroelectrodes (UMEAs) have been electrochemically characterized and compared with a normal‐size electrode. The achievement of steady‐state conditions, effects of supporting electrolyte and the role of conditioning and activation have been considered. The results obtained show that it is possible to monitor the effective area of those devices by chronoamperometry, which confirms the convenience of using the internal auxiliary and reference electrodes and this evidences that steady‐state currents are holding in a wide range of scan rates. Additionally, some preliminary tests show the promising features of gold UMEAs in flow systems like FIA or HPLC.