A comparison of fabrication methods for Iridium Oxide reference electrodes

Author

Franklin, Robert K. ; Joo, Segyeong ; Negi, Sandeep ; Solzbacher, Florian ; Brown, Richard B.

Author_Institution

Dept. of Electr. Eng. & Comput. Sci., Univ. of Michigan, Ann Arbor, MI, USA

fYear

2009

fDate

25-28 Oct. 2009

Firstpage

1086

Lastpage

1089

Abstract

Several methods for the manufacturing of Iridium Oxide (IrOx) electrodes have been discussed in the literature. Two commonly used fabrication methods are Sputtered Iridium Oxide Films (SIROF) and Activated Iridium Oxide Films (AIROF). Most of the studies for in vivo electrodes have reported optimizations to these methods in the context of stimulation of and recording from neural tissue. In this work we characterize three fabrication methods of IrOx films for use as reference electrodes during in vivo neurochemical recordings, and we conclude that AIROF electrodes are preferable as reference electrodes due to their superior open circuit potential (OCP) stability.

Keywords

biomedical electrodes; biomedical materials; biomedical measurement; electrochemical electrodes; electrodeposition; electrodeposits; iridium compounds; neurophysiology; sputter deposition; sputtered coatings; thin films; AIROF; IrO_X; SIROF; activated iridium oxide films; iridium oxide reference electrodes; neural recording; neural tissue stimulation; neurochemical recordings; open circuit potential stability; reference electrode fabrication methods; sputtered iridium oxide films; Biomedical electrodes; Biosensors; Circuit testing; Computer aided manufacturing; Fabrication; Impedance; In vivo; Probes; Stability; Surface morphology;

fLanguage

English

Publisher

ieee

Conference_Titel

Sensors, 2009 IEEE

Conference_Location

Christchurch

ISSN

1930-0395

Print_ISBN

978-1-4244-4548-6

Electronic_ISBN

1930-0395

Type

conf

DOI

10.1109/ICSENS.2009.5398565

Filename

5398565