Simultaneous photoadhesion and photopatterning technique for passivation of flexible neural electrodes based on fluoropolymers
Abstract Herein, we introduce a method to simultaneously photoadhere a photocrosslinkable polymer to a plasma-treated fluoropolymer while photopatterning the photocrosslinkable polymer via a single-photo-exposure as a new electrode passivation technique. Photoadhesion was determined to result from p...
Main Authors: | , |
---|---|
Format: | Article |
Language: | English |
Published: |
Nature Publishing Group
2020-12-01
|
Series: | Scientific Reports |
Online Access: | https://doi.org/10.1038/s41598-020-78494-w |
id |
doaj-d189f31a52a246f2a6f75db7969d5764 |
---|---|
record_format |
Article |
spelling |
doaj-d189f31a52a246f2a6f75db7969d57642020-12-08T12:11:55ZengNature Publishing GroupScientific Reports2045-23222020-12-0110111310.1038/s41598-020-78494-wSimultaneous photoadhesion and photopatterning technique for passivation of flexible neural electrodes based on fluoropolymersYong Hee Kim0Sang-Don Jung1ICT Creative Research Division, Electronics and Telecommunications Research InstituteICT Creative Research Division, Electronics and Telecommunications Research InstituteAbstract Herein, we introduce a method to simultaneously photoadhere a photocrosslinkable polymer to a plasma-treated fluoropolymer while photopatterning the photocrosslinkable polymer via a single-photo-exposure as a new electrode passivation technique. Photoadhesion was determined to result from plasma-generated radicals of the plasma-treated fluoropolymer. Crystallinity of the fluoropolymer was analysed to determine the photoadhesion strength through its effects on both the formation of radicals and the etching of fluoropolymers. Passivation feasibility of simultaneous photoadhesion and photopatterning (P&P) technique were demonstrated by fabricating an Au electrocorticography electrode array and modifying the electrode with electro-deposited metallic nanoparticles. Adhesion of sputter-deposited Au to the fluoropolymer was dependent on mechanical interlocking, indicated by the formation of Au clusters which are typically influenced by the surface temperature during the sputter-deposition and the glass transition temperature of the fluoropolymer. The adhesion of Au to the fluoropolymer without an additional adhesion promotor and the proposed P&P passivation technique would help prevent detachment of the electrode and the delamination of the passivation layer in fluoropolymer-based neural electrode.https://doi.org/10.1038/s41598-020-78494-w |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Yong Hee Kim Sang-Don Jung |
spellingShingle |
Yong Hee Kim Sang-Don Jung Simultaneous photoadhesion and photopatterning technique for passivation of flexible neural electrodes based on fluoropolymers Scientific Reports |
author_facet |
Yong Hee Kim Sang-Don Jung |
author_sort |
Yong Hee Kim |
title |
Simultaneous photoadhesion and photopatterning technique for passivation of flexible neural electrodes based on fluoropolymers |
title_short |
Simultaneous photoadhesion and photopatterning technique for passivation of flexible neural electrodes based on fluoropolymers |
title_full |
Simultaneous photoadhesion and photopatterning technique for passivation of flexible neural electrodes based on fluoropolymers |
title_fullStr |
Simultaneous photoadhesion and photopatterning technique for passivation of flexible neural electrodes based on fluoropolymers |
title_full_unstemmed |
Simultaneous photoadhesion and photopatterning technique for passivation of flexible neural electrodes based on fluoropolymers |
title_sort |
simultaneous photoadhesion and photopatterning technique for passivation of flexible neural electrodes based on fluoropolymers |
publisher |
Nature Publishing Group |
series |
Scientific Reports |
issn |
2045-2322 |
publishDate |
2020-12-01 |
description |
Abstract Herein, we introduce a method to simultaneously photoadhere a photocrosslinkable polymer to a plasma-treated fluoropolymer while photopatterning the photocrosslinkable polymer via a single-photo-exposure as a new electrode passivation technique. Photoadhesion was determined to result from plasma-generated radicals of the plasma-treated fluoropolymer. Crystallinity of the fluoropolymer was analysed to determine the photoadhesion strength through its effects on both the formation of radicals and the etching of fluoropolymers. Passivation feasibility of simultaneous photoadhesion and photopatterning (P&P) technique were demonstrated by fabricating an Au electrocorticography electrode array and modifying the electrode with electro-deposited metallic nanoparticles. Adhesion of sputter-deposited Au to the fluoropolymer was dependent on mechanical interlocking, indicated by the formation of Au clusters which are typically influenced by the surface temperature during the sputter-deposition and the glass transition temperature of the fluoropolymer. The adhesion of Au to the fluoropolymer without an additional adhesion promotor and the proposed P&P passivation technique would help prevent detachment of the electrode and the delamination of the passivation layer in fluoropolymer-based neural electrode. |
url |
https://doi.org/10.1038/s41598-020-78494-w |
work_keys_str_mv |
AT yongheekim simultaneousphotoadhesionandphotopatterningtechniqueforpassivationofflexibleneuralelectrodesbasedonfluoropolymers AT sangdonjung simultaneousphotoadhesionandphotopatterningtechniqueforpassivationofflexibleneuralelectrodesbasedonfluoropolymers |
_version_ |
1724389384789164032 |