Journal
MATERIALS CHEMISTRY AND PHYSICS
Volume 159, Issue -, Pages 119-127Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.matchemphys.2015.03.061
Keywords
Oxides; Coatings; Surfaces; Electrochemical properties
Categories
Funding
- Natural Science and Engineering Research Council of Canada [202887]
- University of Engineering and Technology, Peshawar, Pakistan
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Electrochemical and topographical/structural/morphological properties of thermally prepared Ir/Ru-oxide coatings of various compositions formed on a Ti substrate were investigated. An apparent electrochemically active surface area (AEASA) and charge storage capacity (CSC) were determined. The freshly-prepared Ir0.6Ru0.4-oxide coating was found to offer the largest AEASA and CSC; however, after exposing all the coatings to prolonged extreme electrochemical cycling in phosphate buffered saline pH 7.4, within a 5 V potential window (torturing), the Ir0.8Ru0.2-oxide coating yielded both the largest AEASA (1540 cm(2)) and CSC (27 mC cm(-2)). Under the same experimental condition, the Ir0.8Ru0.2-oxide coating was found to yield by a 56% higher CSC than the current state-of-the-art neural stimulating electrode, Ir-oxide, making it a good candidate for further optimization and possible application as a neural stimulating electrode. (C) 2015 Elsevier B.V. All rights reserved.
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