Thin film flexible electrodes based on gold/polytetrafluoroethylene layers

JAD McLaughlin, M Hyland, ET McAdams, D Holder, DM Zhou

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Thin film gold electrodes on flexible Poltetrafluoroethylene (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 (A.C) impedance measurements show a linear relationship between tile reactive component of the impedance and the surface roughness, Surface features below 42 nm root mean square deviation from the average surface height are shown to result in it reduction in interface impedance and improved impedance matching to a 1% NaCl solution. The surface roughness of the gold is controlled using an electrolytic etch in a NaCl solution allowing the electrical characteristics of the interface to be influenced, Plasma modification of the PTFE substrate is seen to increase the surface energy by changing the chemical nature of tile polymer and lead to enhanced adhesion of the gold layers, Applications of such techniques are expected to improve the current design of physiolgcal signal sensors as well as enhance the reproduabilty of biosensing devices.
Original languageEnglish
Title of host publicationUnknown Host Publication
Place of Publication345 E 47TH ST, NEW YORK, NY 10017 USA
PublisherIEEE
Pages108-109
Number of pages2
Volume18
Publication statusPublished - 1997
EventPROCEEDINGS OF THE 18TH ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY, VOL 18, PTS 1-5 -
Duration: 1 Jan 1997 → …

Publication series

NamePROCEEDINGS OF THE ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY
PublisherIEEE

Conference

ConferencePROCEEDINGS OF THE 18TH ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY, VOL 18, PTS 1-5
Period1/01/97 → …

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