# Ion sensors based on organic semiconductors acting as quasi-reference electrodes

https://mdr.nims.go.jp/datasets/c10438f9-25d7-4004-99b4-6795b50e8d57

## File

- [EDLT-pnas.pdf](https://mdr.nims.go.jp/filesets/3037bc42-49ea-4982-aac7-561fae616cd8/download) ([Detail](https://mdr.nims.go.jp/filesets/3037bc42-49ea-4982-aac7-561fae616cd8.md))

## Id

c10438f9-25d7-4004-99b4-6795b50e8d57

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2024-12-02T07:00:08.227035Z

## Updated at

2024-12-03T07:30:55.259777Z

## Published at

2024-12-03T07:30:55.366830Z

## Doi

https://doi.org/10.48505/nims.5078

## First published url

https://doi.org/10.1073/pnas.2405933121

## Date published

2024-09-23

## Recorded date published

2024-10

## Resource type

journal_article

## Manuscript type

accepted_manuscript

## Collection



## Title

- title: Ion sensors based on organic semiconductors acting as quasi-reference electrodes
  title_type: original
  lang: en

## Description

- description: Thin-film devices that transduce the chemical activity of ions into
    electronic signals are essential components in various applications, including
    healthcare diagnostics and environmental monitoring. Combinations of organic semiconductors
    (OSCs) and ion-selective materials have been explored for developing solution-processable
    ion sensors. However, the necessity of reference electrodes and operational stability
    in ion-permeable OSCs have posed questions regarding whether reliable measurements
    with thin-film components are attainable with OSCs. Herein, we report electric
    double-layer transistors (EDLTs) with OSCs in single-crystal forms for ion sensing.
    Our EDLTs demonstrated high operational stability, with a one-to-one relationship
    between the source electrode potential and device resistance, and served as quasi-reference
    electrodes. When our EDLT is served as quasi-reference electrode, its drift was
    as small as 0.5 mV/h and comparable to that of commonly employed reference electrodes.
    In our system, the semiconductor-electrolyte interface is self-passivated by the
    alkyl chains of OSCs in single-crystal structures, with the two-dimensional transport
    layer appearing unaltered upon gating. EDLT arrays with ion-selective and non-selective
    liquid junctions enable ion concentration sensing without a conventional reference
    electrode. These findings provide opportunities to develop thin-film devices based
    on OSCs for easy integration and reliable measurements.
  description_type: abstract
  lang: en

## Creator

- name: Yu Yamashita
  role: author
  orcid: https://orcid.org/0000-0001-7966-3197
  organization: National Institute for Materials Science
- name: Harumi Hayakawa
  role: author
- name: Pushi Wang
  role: author
- name: Tatsuyuki Makita
  role: author
- name: Shohei Kumagai
  role: author
- name: Shun Watanabe
  role: author
- name: Jun Takeya
  role: author
  orcid: https://orcid.org/0000-0002-7003-1350
  organization: National Institute for Materials Science

## Contact agent



## Publisher

organization: Proceedings of the National Academy of Sciences

## Managing organization



## Keyword

- subject: organic semiconductor
  schema: not_defined
- subject: ion sensor
  schema: not_defined

## Rights

- identifier: https://creativecommons.org/licenses/by-nc-nd/4.0/

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: Proceedings of the National Academy of Sciences
  issn: '10916490'
  volume: '121'
  issue: '40'
  article_number: e2405933121

## Conference



## Related item



## Funding

- identifier: JP20H00392
  funder_name: MEXT | Japan Society for the Promotion of Science
- identifier: JP22H04959
  funder_name: MEXT | Japan Society for the Promotion of Science
- identifier: JPMJCR21O3
  funder_name: MEXT | JST | Core Research for Evolutional Science and Technology

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## Fileset

- id: 3037bc42-49ea-4982-aac7-561fae616cd8
  filename: EDLT-pnas.pdf
  content_type: application/pdf
  size: 1890581
  md5: 72197222e17eb032165c9ac482dc7b4b

## Thumbnail

fileset_id: 3037bc42-49ea-4982-aac7-561fae616cd8
filename: EDLT-pnas.pdf