# Electrochemistry at the Edge of a van der Waals Heterostructure

https://mdr.nims.go.jp/datasets/6f92f21b-6e78-4047-ac0c-f7936234145a

## File

- [Small - 2023 - Plačkić - Electrochemistry at the Edge of a van der Waals Heterostructure.pdf](https://mdr.nims.go.jp/filesets/66b30603-db77-4896-8e62-a202a47aa67c/download) ([Detail](https://mdr.nims.go.jp/filesets/66b30603-db77-4896-8e62-a202a47aa67c.md))

## Id

6f92f21b-6e78-4047-ac0c-f7936234145a

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2025-02-18T00:27:06.658437Z

## Updated at

2025-02-23T13:46:08.203176Z

## Published at

2025-02-23T13:46:08.327033Z

## Doi



## First published url

https://doi.org/10.1002/smll.202306361

## Date published

2023-12-18

## Recorded date published

2024-5

## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: Electrochemistry at the Edge of a van der Waals Heterostructure
  title_type: original
  lang: en

## Description

- description: Artificial van der Waals heterostructures, obtained by stacking layered
    two-dimensional materials, represent a novel material platform for investigating
    physicochemical phenomena and applications. We report here electrochemistry at
    the one-dimensional edge of a graphene sheet, which is sandwiched between two
    hexagonal boron nitride (hBN) multilayer flakes. When such an hBN/graphene/hBN
    heterostructure is immersed in a solution, the basal plane of graphene is protected
    and isolated by the hBN stack, and the edge of the graphene sheet is exclusively
    available in the solution. This forms an electrochemical nanoelectrode, which
    enabled us to investigate electron transfer using several redox probes, e.g.,
    ferrocene(di)methanol, hexaammineruthenium, methylene blue, dopamine and ferrocyanide.
    Facilitated by the relatively low capacitance of the van der Waals edge electrode,
    we demonstrate cyclic voltammetry at very high scan rates (up to 1000 V/s). Using
    fast scan cyclic voltammetry imaging, we show that redox species can be detected
    voltammetrically down to  micromolar concentrations with subsecond time resolution
    at the sandwiched graphene edge, promoted by the rapid equilibration of analyte
    species in the diffusion layer. Furthermore, the nanoband nature of the edge electrode
    allows us to work directly in water in the absence of added electrolyte. Finally,
    we show that two adjacent edge electrodes can be realized in a redoxcycling format.
    In all, the van der Waals edge electrode is unique among nanoelectrodes as it
    enables investigations of the all the above-mentioned phenomena in the same device.
    Due to its versatility, it constitutes a new avenue for nanoscale electrochemistry,
    which will be useful for studying electron transfer mechanisms as well as for
    the detection of analyte species in ultralow sample volumes.
  description_type: abstract
  lang: und

## Creator

- name: Aleksandra Plačkić
  role: author
- name: Tilmann J. Neubert
  role: author
- name: Kishan Patel
  role: author
- name: Michel Kuhl
  role: author
- name: Kenji Watanabe
  role: author
  orcid: https://orcid.org/0000-0003-3701-8119
  organization: National Institute for Materials Science
- name: Takashi Taniguchi
  role: author
  orcid: https://orcid.org/0000-0002-1467-3105
  organization: National Institute for Materials Science
- name: Amaia Zurutuza
  role: author
- name: Roman Sordan
  role: author
- name: Kannan Balasubramanian
  role: author

## Contact agent



## Publisher

organization: Wiley

## Managing organization



## Keyword

- subject: Electrochemistry
  schema: not_defined
- subject: graphene
  schema: not_defined
- subject: hexagonal boron nitride
  schema: not_defined

## Rights

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

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: Small
  issn: '16136810'
  volume: '20'
  issue: '21'
  article_number: '2306361'

## Conference



## Related item



## Funding

- identifier: '425219379'
  funder_name: Deutsche Forschungsgemeinschaft
- identifier: INST 276/754‐1
  funder_name: Deutsche Forschungsgemeinschaft

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## Specimen



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## Fileset

- id: 66b30603-db77-4896-8e62-a202a47aa67c
  filename: Small - 2023 - Plačkić - Electrochemistry at the Edge of a van der Waals
    Heterostructure.pdf
  content_type: application/pdf
  size: 3886083
  md5: fc0a95ff57dca05df5c568399ef2a6ec

## Thumbnail

fileset_id: 66b30603-db77-4896-8e62-a202a47aa67c
filename: Small - 2023 - Plačkić - Electrochemistry at the Edge of a van der Waals
  Heterostructure.pdf