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Thin film platinum cuff electrodes for neurostimulation: in vitro approach of safe neurostimulation parameters

Biomedical Sciences Research Institute Computer Science Research Institute Environmental Sciences Research Institute Nanotechnology & Advanced Materials Research Institute

Mailley, S, Hyland, M, Mailley, P, McLaughlin, JAD and McAdams, ET (2004) Thin film platinum cuff electrodes for neurostimulation: in vitro approach of safe neurostimulation parameters. BIOELECTROCHEMISTRY, 63 (1-2). pp. 359-364. [Journal article]

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URL: http://www.sciencedirect.com/science?_ob=MImg&_imagekey=B6W72-4BV4PPH-5-F&_cdi=6614&_user=126978&_orig=search&_coverDate=06%2F30%2F2004&_sk=999369998&view=c&wchp=dGLbVlW-zSkWz&md5=649723f18378eefb3ef8987a1aeaa89c&ie=/sdarticle.pdf

DOI: 10.1016/j.bioelechem.2003.10.033

Abstract

Thin film technology takes more and more importance in the development of biomedical devices dedicated to functional neurostimulation. Our research about the design of implant neurostimulating electrode is oriented toward thin film cuff electrodes based on a polyimide substrate covered by a chromium/gold/Pt film. The chromium/gold sputtered film serves as adhesion layer and current collector whereas platinum acts as an electrochemical actuator. The electrode surface has been designed to obey safe stimulation criteria (i.e. chemically inert noble metal, low electrode-electrolyte impedance, high electrochemical reversibility, high corrosion stability). The electrochemical behaviour of such platinum electrodes has been assessed and compared to a foil of platinum. Extensive in vitro characterisations of the both electrode types were carried out using AFM, SEM and electrochemical techniques. The role of enhanced surface roughness enabling high double layer capacitances to be achieved was clearly highlighted. The obtained results are discussed, with particular reference to thin film electrodes stability under in vitro electrical stimulation in NaCl 0.9% (physiological serum). Therefore, these thin film devices showed reversible PtOH formation and decomposition making them potentially attractive for the fabrication of implant stimulation cuff electrodes. (C) 2004 Elsevier B.V. All rights reserved.

Item Type:Journal article
Keywords:platinum implant electrode; cuff electrode; neurostimulation; AC impedance
Faculties and Schools:Faculty of Computing & Engineering
Faculty of Computing & Engineering > School of Engineering
Research Institutes and Groups:Engineering Research Institute
Engineering Research Institute > Nanotechnology & Integrated BioEngineering Centre (NIBEC)
ID Code:297
Deposited By:Mrs Ann Blair
Deposited On:19 Oct 2009 13:54
Last Modified:15 Jun 2011 10:52

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