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...

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Autores principales:	Yong Hee Kim, Sang-Don Jung
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2020
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/d189f31a52a246f2a6f75db7969d5764
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spelling	oai:doaj.org-article:d189f31a52a246f2a6f75db7969d57642021-12-02T11:41:56ZSimultaneous photoadhesion and photopatterning technique for passivation of flexible neural electrodes based on fluoropolymers10.1038/s41598-020-78494-w2045-2322https://doaj.org/article/d189f31a52a246f2a6f75db7969d57642020-12-01T00:00:00Zhttps://doi.org/10.1038/s41598-020-78494-whttps://doaj.org/toc/2045-2322Abstract 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.Yong Hee KimSang-Don JungNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 10, Iss 1, Pp 1-13 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Yong Hee Kim Sang-Don Jung Simultaneous photoadhesion and photopatterning technique for passivation of flexible neural electrodes based on fluoropolymers
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.
format	article
author	Yong Hee Kim Sang-Don Jung
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 Portfolio
publishDate	2020
url	https://doaj.org/article/d189f31a52a246f2a6f75db7969d5764
work_keys_str_mv	AT yongheekim simultaneousphotoadhesionandphotopatterningtechniqueforpassivationofflexibleneuralelectrodesbasedonfluoropolymers AT sangdonjung simultaneousphotoadhesionandphotopatterningtechniqueforpassivationofflexibleneuralelectrodesbasedonfluoropolymers
_version_	1718395428126326784

Simultaneous photoadhesion and photopatterning technique for passivation of flexible neural electrodes based on fluoropolymers

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