Investigating the interfacial properties of electrochemically roughened platinum electrodes for neural stimulation
Abstract
Platinum electrodes have been electrochemically roughened (roughness factors up to 430) and evaluated for use as neural stimulation electrodes. The roughened electrodes show superior interfacial properties with increasing surface roughness. The roughened electrode (fR = 250) has a charge injection limit of 1.0 mC cm(-2) (400 μs pulse width), which is superior to that of titanium nitride (0.87 mC cm(-2)) but comparable to that of carbon nanotubes (1.0-1.6 mC cm(-2)). The surface roughness can also be optimized for different neural stimulation applications based on the available charge density at a particular pulse width of stimulation. The roughened platinum electrodes demonstrated good mechanical stability under harsh ultrasonication and electrochemical stability under continuous biphasic stimulation, indicating the potential of this biological interface to be safe and stable.
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A lower impedance magnitude is more suitable for both electrical recording and stimulation, increasing the recorded SNR and the stimulation efficiency.
“A lower impedance magnitude is more suitable for both electrical recording and stimulation, i.e., increasing the recorded SNR and the stimulation efficiency.”
From Climbing-inspired twining electrodes using shape memory for peripheral nerve stimulation and recording (2019) · cites this paper as [41]
A larger CDC can decrease the current amplitudes that are required to activate the nerves during stimulation, which can also decrease the electrical damage to the nerve.
“A larger CDC can decrease the current amplitudes that are required to activate the nerves during the stimulation, which can also decrease the electrical damage to the nerve (10, 40, 41).”
From Climbing-inspired twining electrodes using shape memory for peripheral nerve stimulation and recording (2019) · cites this paper as [41]
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- Authors
- Weremfo, A., Carter, P., Hibbert, D. B., & Zhao, C.
- Affiliations
- UNSW Sydney (AU)
- Cochlear (Australia) (AU)
- Corresponding author
- Carter, Paul
- Hibbert, D. Brynn
- Zhao, Chuan
- Venue
- Langmuir
- Publisher
- American Chemical Society (ACS)
- Published
- 2015-02-19
- Volume
- 31
- Issue
- 8
- Pages
- 2593-2599
- ISSN
- 0743-7463 (ISSN-L)
- 1520-5827
- OpenAlex
- W2334119338
- Cited by
- 59
- References
- 33
- Citations by year
- 2026: 4 · 2025: 7 · 2024: 4 · 2023: 3 · 2022: 5 · 2021: 4 · 2020: 5 · 2019: 12 · 2018: 5 · 2017: 5 · 2016: 3 · 2015: 2
- FWCI
- 2.32
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Langmuir (publishedVersion)
- PubMed (publishedVersion)
- Funders
- Australian Research Council (DP110102569, LP100200770)
- Topics
- Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neural Engineering
- Physical Sciences › Chemistry › Electrochemistry › Electrochemical Analysis and Applications
- Physical Sciences › Engineering › Electrical and Electronic Engineering › Electrochemical sensors and biosensors
- Keywords
- platinum electrode, neural stimulation electrodes, electrode-electrolyte interface, charge injection limit, surface roughness, titanium nitride electrodes, carbon nanotube electrodes, biphasic stimulation, mechanical stability, sonication, electrochemical stability, biointerfaces
- MeSH terms
- Electrodes, Particle Size, Platinum, Surface Properties, Electrochemical Techniques
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