PEDOT:PSS Wire: A Two-Terminal Synaptic Device for Operation in Electrolyte and Saline Solutions

Watanabe, Seiya; Shibakita, Hiroaki; Hagiwara, Naruki; Nakajima, Ryosuke; Kato, Hiroyuki S.; Akai-Kasaya, Megumi

doi:https://doi.org/10.1021/acsami.4c12037

PEDOT:PSS Wire: A Two-Terminal Synaptic Device for Operation in Electrolyte and Saline Solutions

Watanabe, Seiya; Shibakita, Hiroaki; Hagiwara, Naruki et al.

ACS Applied Materials and Interfaces, 2024, 16(40), 54636-54644

アクセス数:447件（2025-07-18 17:33 集計）

固定URL: https://hdl.handle.net/11094/98354

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タイトル	PEDOT:PSS Wire: A Two-Terminal Synaptic Device for Operation in Electrolyte and Saline Solutions
著者	NRID 1000020850035 1000020850035 ORCID 0000-0001-7422-8452 0000-0001-7422-8452 researchmap permalink seiya129 seiya129 著者名 Watanabe, Seiya
	著者名 Shibakita, Hiroaki
	著者名 Hagiwara, Naruki
	著者名 Nakajima, Ryosuke
	NRID 1000080300862 1000080300862 researchmap permalink read_hskato read_hskato Scopus Author ID 7406492466 7406492466 著者名 Kato, Hiroyuki S.
	NRID 1000050437373 1000050437373 researchmap permalink Meg_Aki_Kassy Meg_Aki_Kassy Scopus Author ID 6507985913 6507985913 著者名 Akai-Kasaya, Megumi
キーワード等	clinical application
	conductive polymer
	neuromorphic
	polymer wire
	synaptic device
内容	Watanabe S., Shibakita H., Hagiwara N., et al. PEDOT:PSS Wire: A Two-Terminal Synaptic Device for Operation in Electrolyte and Saline Solutions. ACS Applied Materials and Interfaces 16, 54636 (2024); https://doi.org/10.1021/acsami.4c12037 .
抄録	Synaptic devices, which are designed to emulate the synaptic functions of neurons, have recently gained attention as key elements in the development of neuromorphic hardware. To date, most synaptic devices utilizing conductive polymer materials, particularly poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS), have been designed as three-terminal devices. Nevertheless, a recent study revealed that a single PEDOT:PSS wire can function as a two-terminal synaptic device through additional polymerization, which creates asymmetry in the wire diameter between the anode and cathode. Owing to its high biocompatibility, PEDOT is considered a promising candidate for use in clinical information-processing devices. However, previous studies examined the synaptic function of PEDOT:PSS only in PSS solutions. Therefore, the performance of PEDOT:PSS wires in other solutions, such as physiological saline solutions, remains unknown. Herein, we investigated the effects of operating environmental conditions (including phosphate-buffered saline (PBS)) on the synaptic functions of the asymmetric PEDOT:PSS wire. Our results indicate that the synaptic conductance change in the PEDOT:PSS wire occurred in all investigated aqueous electrolyte solutions. Moreover, we revealed the relationship between the synaptic conductance change behavior and the molecular properties of the electrolyte ions. Furthermore, the waveform of the conductance change can be controlled by adjusting the conditions for wire asymmetrization. These results demonstrate that the PEDOT:PSS wire exhibits a synaptic conductance change, yielding a waveform suitable for machine learning, even under wet conditions (i.e., in any electrolyte solution, including PBS). Therefore, PEDOT:PSS wire is a promising material for two-terminal synaptic devices applicable in clinical studies.
出版者	American Chemical Society
収録物名	ACS Applied Materials and Interfaces
巻(号)	16(40)
ページ	54636-54644
刊行年月	2024-09-30
言語	英語
ハンドルURL	https://hdl.handle.net/11094/98354
PISSN	19448244
eISSN	19448252
関連情報 (isIdenticalTo)	DOI (出版社版) https://doi.org/10.1021/acsami.4c12037
アクセス権	open access
権利情報	This article is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
出版タイプ	Version of Record
カテゴリ	学術雑誌論文 Journal Article

資源タイプ	学術雑誌論文
ローカル資源タイプ	学術雑誌論文
DCTERMS.bibliographicCitation	ACS Applied Materials and Interfaces. 2024, 16(40), p. 54636-54644
DC.title	PEDOT:PSS Wire: A Two-Terminal Synaptic Device for Operation in Electrolyte and Saline Solutions
DC.creator	Watanabe, Seiya
	Shibakita, Hiroaki
	Hagiwara, Naruki
	Nakajima, Ryosuke
	Kato, Hiroyuki S.
	Akai-Kasaya, Megumi
DC.publisher	American Chemical Society
DC.language' scheme='DCTERMS.RFC1766	英語
DCTERMS.issued' scheme='DCTERMS.W3CDTF	2024-09-30
DC.identifier	https://doi.org/10.1021/acsami.4c12037
DC.subject	clinical application
	conductive polymer
	neuromorphic
	polymer wire
	synaptic device
DC.description	Watanabe S., Shibakita H., Hagiwara N., et al. PEDOT:PSS Wire: A Two-Terminal Synaptic Device for Operation in Electrolyte and Saline Solutions. ACS Applied Materials and Interfaces 16, 54636 (2024); https://doi.org/10.1021/acsami.4c12037 .
DCTERMS.abstract	Synaptic devices, which are designed to emulate the synaptic functions of neurons, have recently gained attention as key elements in the development of neuromorphic hardware. To date, most synaptic devices utilizing conductive polymer materials, particularly poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS), have been designed as three-terminal devices. Nevertheless, a recent study revealed that a single PEDOT:PSS wire can function as a two-terminal synaptic device through additional polymerization, which creates asymmetry in the wire diameter between the anode and cathode. Owing to its high biocompatibility, PEDOT is considered a promising candidate for use in clinical information-processing devices. However, previous studies examined the synaptic function of PEDOT:PSS only in PSS solutions. Therefore, the performance of PEDOT:PSS wires in other solutions, such as physiological saline solutions, remains unknown. Herein, we investigated the effects of operating environmental conditions (including phosphate-buffered saline (PBS)) on the synaptic functions of the asymmetric PEDOT:PSS wire. Our results indicate that the synaptic conductance change in the PEDOT:PSS wire occurred in all investigated aqueous electrolyte solutions. Moreover, we revealed the relationship between the synaptic conductance change behavior and the molecular properties of the electrolyte ions. Furthermore, the waveform of the conductance change can be controlled by adjusting the conditions for wire asymmetrization. These results demonstrate that the PEDOT:PSS wire exhibits a synaptic conductance change, yielding a waveform suitable for machine learning, even under wet conditions (i.e., in any electrolyte solution, including PBS). Therefore, PEDOT:PSS wire is a promising material for two-terminal synaptic devices applicable in clinical studies.
DC.rights	This article is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
DC.format	98354
citation_title	PEDOT:PSS Wire: A Two-Terminal Synaptic Device for Operation in Electrolyte and Saline Solutions
citation_author	Watanabe, Seiya
	Shibakita, Hiroaki
	Hagiwara, Naruki
	Nakajima, Ryosuke
	Kato, Hiroyuki S.
	Akai-Kasaya, Megumi
citation_publisher	American Chemical Society
citation_language	英語
citation_date	2024-09-30
citation_journal_title	ACS Applied Materials and Interfaces
citation_volume	16
citation_issue	40
citation_firstpage	54636
citation_lastpage	54644
citation_doi	https://doi.org/10.1021/acsami.4c12037
citation_public_url	https://hdl.handle.net/11094/98354

PEDOT:PSS Wire: A Two-Terminal Synaptic Device for Operation in Electrolyte and Saline Solutions

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