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

M Hyland, JAD McLaughlin, DM Zhou, ET McAdams

Research output: Contribution to journalArticle

8 Citations (Scopus)

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.
LanguageEnglish
Pages705-709
JournalANALYST
Volume121
Issue number6
Publication statusPublished - Jun 1996

Fingerprint

surface roughness
gold
electrodes
thin films
impedance
impedance matching
impedance measurement
implantation
alternating current
atomic force microscopy
deviation
causes

Keywords

  • electrodes
  • thin-film gold
  • surface modification
  • electropitting

Cite this

Hyland, M ; McLaughlin, JAD ; Zhou, DM ; McAdams, ET. / Surface modification of thin film gold electrodes for improved in vivo performance. In: ANALYST. 1996 ; Vol. 121, No. 6. pp. 705-709.
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Hyland, M, McLaughlin, JAD, Zhou, DM & McAdams, ET 1996, 'Surface modification of thin film gold electrodes for improved in vivo performance', ANALYST, vol. 121, no. 6, pp. 705-709.

Surface modification of thin film gold electrodes for improved in vivo performance. / Hyland, M; McLaughlin, JAD; Zhou, DM; McAdams, ET.

In: ANALYST, Vol. 121, No. 6, 06.1996, p. 705-709.

Research output: Contribution to journalArticle

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AU - Zhou, DM

AU - McAdams, ET

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