Journal article

Near-infrared excitation of nitrogen-doped ultrananocrystalline diamond photoelectrodes in saline solution

Andre Chambers, Arman Ahnood, Samira Falahatdoost, Steve Yianni, David Hoxley, Brett C Johnson, David J Garrett, Snjezana Tomljenovic-Hanic, Steven Prawer

Diamond and Related Materials | Elsevier | Published : 2020


Nitrogen-doped ultrananocrystalline diamond (N-UNCD) is a promising material for a variety of neural interfacing applications, due to its unique combination of high conductivity, bioinertness, and durability. One emerging application for N-UNCD is as a photoelectrode material for high-precision optical neural stimulation. This may be used for the treatment of neurological disorders and for implantable bionic devices such as cochlear ear implants and retinal prostheses. N-UNCD is a well-suited material for stimulation photoelectrodes, exhibiting a photocurrent response to light at visible wavelengths with a high charge injection density [A. Ahnood, A. N. Simonov, J. S. Laird, M. I. Maturana, ..

View full abstract


Awarded by Australian Research Council

Awarded by National Health and Medical Research Council of Australia

Funding Acknowledgements

This work was performed in part at the Australian National Fabrication Facility (ANFF), a company established under the National Collaborative Research Infrastructure Strategy, through the La Trobe University Centre for Materials and Surface Science. The authors also wish to acknowledge the technical assistance of Dr. Matias Maturana at Clinical Sciences, Department of Medicine, University of Melbourne, as well as helpful discussions with Alastair Stacey and Nikolai Dontschuk from the School of Physics, University of Melbourne. This research was supported by the Australian Research Council, through Linkage Grant LP160101052. D.J.G. is supported by a National Health and Medical Research Council of Australia Project Grant GNT1101717. A.A. gratefully acknowledges the William Stone Trust funding, University of Melbourne.