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Surface modification of thin film gold electrodes for improved in vivo performance

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

Hyland, M, McLaughlin, JAD, Zhou, DM and McAdams, ET (1996) Surface modification of thin film gold electrodes for improved in vivo performance. ANALYST, 121 (6). pp. 705-709. [Journal article]

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Abstract

Thin film gold electrodes on flexible PTFE substrates are produced for medical implantation. The electrical interface impedance of the electrodes is measured in vitro as a function of surface roughness of the gold as quantified using atomic force microscopy. Alternating current impedance measurements show a linear relationship between the reactive component of the impedance and the surface roughness. Surface features below a few tens of nanometres root mean square deviation from the average surface height are shown to result in a reduction in interface impedance and improved matching to a 1% NaCl solution. The surface roughness of the gold is controlled using an electrolytic etch in an NaCl solution which causes electropitting and therefore allows the electrical characteristics of the interface to be influenced.

Item Type:Journal article
Keywords:electrodes; thin-film gold; surface modification; electropitting
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:18931
Deposited By:Mrs Ann Blair
Deposited On:19 Jul 2011 09:05
Last Modified:19 Jul 2011 09:05

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