Diamond/porous titanium nitride electrodes with superior electrochemical performance for neural interfacing

0497870 - FZÚ 2019 RIV CH eng J - Journal Article
Meijs, S. - McDonald, M. - Sørensen, S. - Rechendorff, K. - Fekete, Ladislav - Klimša, Ladislav - Petrák, Václav - Rijkhoff, N. - Taylor, Andrew - Nesládek, M. - Pennisi, C.P.
Diamond/porous titanium nitride electrodes with superior electrochemical performance for neural interfacing.
Frontiers in Bioengineering and Biotechnology. Roč. 6, Nov (2018), s. 1-10, č. článku 171. ISSN 2296-4185. E-ISSN 2296-4185
R&D Projects: GA ČR GA17-15319S; GA MŠMT(CZ) LO1409; GA MŠMT(CZ) LM2015088
Institutional support: RVO:68378271
Keywords : neural prosthesis * neural interfaces * implantable electrodes * electrical stimulation * boron-doped diamond * porous diamond * titanium nitride
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 5.122, year: 2018

Robust devices for chronic neural stimulation demand electrode materials which exhibit high charge injection (Qinj) capacity and long-term stability. Boron-doped diamond (BDD) electrodes have shown promise for neural stimulation applications, but their practical applications remain limited due to the poor charge transfer capability of diamond. In this work, we present an attractive approach to produce BDD electrodes with exceptionally high surface area using porous titanium nitride (TiN) as interlayer template. The TiN deposition parameters were systematically varied to fabricate a range of porous electrodes, which were subsequently coated by a BDD thin-film. The electrodes were investigated by surface analysis methods and electrochemical techniques before and after BDD deposition.
Permanent Link: http://hdl.handle.net/11104/0290866