Design and Testing of a Bending‐Resistant Transparent Nanocoating for Optoacoustic Cochlear Implants

Alessandra Griffo, Yingying Liu, Riitta Mahlberg, Hanna-Leena Alakomi, Leena-Sisko Johansson, Roberto Milani

Research output: Contribution to journalArticleScientificpeer-review

Abstract

A nanosized coating was designed to reduce fouling on the surface of a new type of cochlear implant relying on optoacoustic stimulation. This kind of device imposes novel design principles for antifouling coatings, such as optical transparency and resistance to significant constant bending. To reach this goal we deposited on poly(dimethylsiloxane) a PEO‐based layer with negligible thickness compared to the curvature radius of the cochlea. Its antifouling performance was monitored upon storage by quartz crystal microbalance, and its resistance upon bending was tested by fluorescence microscopy under geometrical constraints similar to those of implantation. The coating displayed excellent antifouling features and good stability, and proved suitable for further testing in real‐environment conditions.
Original languageEnglish
Pages (from-to)1100-1108
Number of pages9
JournalChemistryOpen
Volume8
Issue number8
DOIs
Publication statusPublished - 6 Aug 2019
MoE publication typeA1 Journal article-refereed

Fingerprint

Cochlear implants
Photoacoustic effect
Coatings
Testing
Quartz crystal microbalances
Fluorescence microscopy
Fouling
Transparency

Keywords

  • antifouling coatings
  • implantable devices
  • interfaces
  • silanes
  • surface chemistry
  • thin films

Cite this

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title = "Design and Testing of a Bending‐Resistant Transparent Nanocoating for Optoacoustic Cochlear Implants",
abstract = "A nanosized coating was designed to reduce fouling on the surface of a new type of cochlear implant relying on optoacoustic stimulation. This kind of device imposes novel design principles for antifouling coatings, such as optical transparency and resistance to significant constant bending. To reach this goal we deposited on poly(dimethylsiloxane) a PEO‐based layer with negligible thickness compared to the curvature radius of the cochlea. Its antifouling performance was monitored upon storage by quartz crystal microbalance, and its resistance upon bending was tested by fluorescence microscopy under geometrical constraints similar to those of implantation. The coating displayed excellent antifouling features and good stability, and proved suitable for further testing in real‐environment conditions.",
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Design and Testing of a Bending‐Resistant Transparent Nanocoating for Optoacoustic Cochlear Implants. / Griffo, Alessandra; Liu, Yingying; Mahlberg, Riitta; Alakomi, Hanna-Leena; Johansson, Leena-Sisko; Milani, Roberto.

In: ChemistryOpen, Vol. 8, No. 8, 06.08.2019, p. 1100-1108.

Research output: Contribution to journalArticleScientificpeer-review

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AU - Johansson, Leena-Sisko

AU - Milani, Roberto

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