Details
| Original language | English |
|---|---|
| Article number | e0306613 |
| Journal | PLOS ONE |
| Volume | 19 |
| Issue number | 7 |
| Publication status | Published - 9 Jul 2024 |
Abstract
Platinum and platinum-based alloys are used as the electrode material in cochlear implants because of the biocompatibility and the favorable electrochemical properties. Still, these implants can fail over time. The present study was conducted to shed light on the effects of microstructure on the electrochemical degradation of platinum. After three days of stimulation with a square wave signal, corrosive attack appeared on the platinum surface. The influence of mechanical deformation, in particular rolling, on the corrosion resistance of platinum was also prominent. The cyclic voltammetry showed a clear dependence on the electrolyte used, which was interpreted as an influence of the buffer in the artificial perilymph used. In addition, the polarization curves showed a shift with grain size that was not expected. This could be attributed to the defects present on the surface. These findings are crucial for the manufacture of cochlear implants to ensure their long-term functionality.
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In: PLOS ONE, Vol. 19, No. 7, e0306613, 09.07.2024.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Investigating mechanical deformation’s role in cochlear implant durability
AU - Blank, Tatiana
AU - Ahrens, André Marcel
AU - Klose, Christian
AU - Canadinç, Demircan
AU - Lenarz, Thomas
AU - Maier, Hans Jürgen
N1 - Publisher Copyright: Copyright: © 2024 Blank et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
PY - 2024/7/9
Y1 - 2024/7/9
N2 - Platinum and platinum-based alloys are used as the electrode material in cochlear implants because of the biocompatibility and the favorable electrochemical properties. Still, these implants can fail over time. The present study was conducted to shed light on the effects of microstructure on the electrochemical degradation of platinum. After three days of stimulation with a square wave signal, corrosive attack appeared on the platinum surface. The influence of mechanical deformation, in particular rolling, on the corrosion resistance of platinum was also prominent. The cyclic voltammetry showed a clear dependence on the electrolyte used, which was interpreted as an influence of the buffer in the artificial perilymph used. In addition, the polarization curves showed a shift with grain size that was not expected. This could be attributed to the defects present on the surface. These findings are crucial for the manufacture of cochlear implants to ensure their long-term functionality.
AB - Platinum and platinum-based alloys are used as the electrode material in cochlear implants because of the biocompatibility and the favorable electrochemical properties. Still, these implants can fail over time. The present study was conducted to shed light on the effects of microstructure on the electrochemical degradation of platinum. After three days of stimulation with a square wave signal, corrosive attack appeared on the platinum surface. The influence of mechanical deformation, in particular rolling, on the corrosion resistance of platinum was also prominent. The cyclic voltammetry showed a clear dependence on the electrolyte used, which was interpreted as an influence of the buffer in the artificial perilymph used. In addition, the polarization curves showed a shift with grain size that was not expected. This could be attributed to the defects present on the surface. These findings are crucial for the manufacture of cochlear implants to ensure their long-term functionality.
UR - http://www.scopus.com/inward/record.url?scp=85198369731&partnerID=8YFLogxK
U2 - 10.1371/journal.pone.0306613
DO - 10.1371/journal.pone.0306613
M3 - Article
C2 - 38980854
AN - SCOPUS:85198369731
VL - 19
JO - PLOS ONE
JF - PLOS ONE
SN - 1932-6203
IS - 7
M1 - e0306613
ER -