Electrically conducting diamond films grown on platinum foil for neural stimulation

Md Kabir Uddin Sikder; Mohit N Shivdasani; James B Fallon; Peter Seligman; Kumaravelu Ganesan; Joel Villalobos; Steven Prawer; David J Garrett

Journal article

Electrically conducting diamond films grown on platinum foil for neural stimulation

Md Kabir Uddin Sikder, Mohit N Shivdasani, James B Fallon, Peter Seligman, Kumaravelu Ganesan, Joel Villalobos, Steven Prawer, David J Garrett

JOURNAL OF NEURAL ENGINEERING | IOP PUBLISHING LTD | Published : 2019

DOI: 10.1088/1741-2552/ab2e79

Abstract

OBJECTIVE: With the strong drive towards miniaturization of active implantable medical devices and the need to improve the resolution of neural stimulation arrays, there is keen interest in the manufacture of small electrodes capable of safe, continuous stimulation. Traditional materials such as platinum do not possess the necessary electrochemical properties to stimulate neurons safely when electrodes are very small (i.e. typically less than about 300 µm (78 400 µm2)). While there are several commercially viable alternative electrode materials such as titanium nitride and iridium oxide, an attractive approach is modification of existing Pt arrays via a high electrochemical capacitance mater..

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University of Melbourne Researchers

Steven Prawer Author Physics

James Fallon Author Medical Bionics Department

Peter Seligman Author Audiology and Speech Pathology

David Garrett Author Physics

Kumaravelu Ganesan Author Electrical and Electronic Engineering

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Grants

Awarded by Australian Research Council (ARC)

Awarded by National Health and Medical Research Council (NHMRC) of Australia

Funding Acknowledgements

The authors gratefully acknowledge Vanessa Maxim for her support for this work to fabricate electrodes. (Funding: This research and KS were supported by an Australian Research Council (ARC) DECRA Grant DE130100922. DJG is supported by the National Health and Medical Research Council (NHMRC) of Australia, grant GNT1101717. The Bionics Institute acknowledges the support received from the Victorian Government through its Operational Infrastructure Program for this work.) SEM Imaging of electrodes was conducted at the Advanced Microscopy Facility at Bio21, (The University of Melbourne) on an FEI NOVA Nanolab. SP is shareholder, director and chief technology officer of iBIONICS, a company developing a diamond based retinal implant. SP and DG are shareholders in Carbon Cybernetics, a company developing a carbon-based neural interface.