# Atomic-Scale Multimodal Characterization of Self-Assembled InAs/InGaAlAs Quantum Dots

https://mdr.nims.go.jp/datasets/9cb69231-9d94-486f-8323-20b7fa0d38fd

## File

- [Atomic-Scale Multimodal Characterization of Self-Assembled InAs-InGaAlAs Quantum Dots.pdf](https://mdr.nims.go.jp/filesets/1de710e8-b859-46d3-9e4d-d758aa620350/download) ([Detail](https://mdr.nims.go.jp/filesets/1de710e8-b859-46d3-9e4d-d758aa620350.md))

## Id

9cb69231-9d94-486f-8323-20b7fa0d38fd

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2024-07-17T09:04:55.199702Z

## Updated at

2025-04-14T07:30:23.499728Z

## Published at

2025-04-14T05:56:24.725447Z

## Doi

https://doi.org/10.48505/nims.4594

## First published url

https://doi.org/10.1021/acs.jpclett.3c03507

## Date published

2024-04-11

## Recorded date published

2024-4-11

## Resource type

journal_article

## Manuscript type

accepted_manuscript

## Collection



## Title

- title: Atomic-Scale Multimodal Characterization of Self-Assembled InAs/InGaAlAs
    Quantum Dots
  title_type: original
  lang: en

## Description

- description: Self-assembled quantum dots (QDs) are potential candidates for photoelectric
    and photovoltaic devices, because of their discrete energy levels. The characterization
    of QDs at the atomic level using a multimodal approach is crucial to improving
    device performance because QDs are nanostructures with highly correlated structural
    parameters. In this study, scanning transmission electron microscopy, geometric
    phase analysis, and atom probe tomography were employed to characterize structural
    parameters such as the shape, strain, and composition of self-assembled InAs-QDs
    with InGaAlAs spacer layers. The measurements revealed characteristic AlAs-rich
    regions above the QDs and InAs-rich regions surrounding the QD columns, which
    can be explained by the relationship between the effect of strain and surface
    curvature around the QD. The methodology described in this study accelerates the
    development of future QD devices because its multiple perspectives reveal phenomena
    such as atomic-scale segregations and allow for more detailed discussions of the
    mechanisms of these phenomena.
  description_type: abstract
  lang: und

## Creator

- name: Yudai Yamaguchi
  role: author
- name: Yuta Inaba
  role: author
- name: Ryoji Arai
  role: author
- name: Yuya Kanitani
  role: author
- name: Yoshihiro Kudo
  role: author
- name: Michinori Shiomi
  role: author
- name: Daiji Kasahara
  role: author
- name: Mikihiro Yokozeki
  role: author
- name: Noriyuki Fuutagawa
  role: author
- name: Jun Uzuhashi
  role: author
  orcid: https://orcid.org/0000-0003-2023-8158
  organization: National Institute for Materials Science
  ror: https://ror.org/026v1ze26
- name: Tadakatsu Ohkubo
  role: author
  orcid: https://orcid.org/0000-0003-3548-1951
  organization: National Institute for Materials Science
  ror: https://ror.org/026v1ze26
- name: Kazuhiro Hono
  role: author
  orcid: https://orcid.org/0000-0001-7367-0193
  organization: National Institute for Materials Science
  ror: https://ror.org/026v1ze26
- name: Kouichi Akahane
  role: author
- name: Naokatsu Yamamoto
  role: author
- name: Shigetaka Tomiya
  role: author

## Contact agent



## Publisher

organization: American Chemical Society (ACS)

## Managing organization



## Keyword

- subject: quantum dot
  schema: not_defined
- subject: atom probe tomography
  schema: not_defined
- subject: transmission electron microscopy
  schema: not_defined

## Rights

- description: This document is the Accepted Manuscript version of a Published Work
    that appeared in final form in The Journal of Physical Chemistry Letters, copyright
    © 2024 The Authors. Published by American Chemical Society after peer review and
    technical editing by the publisher. To access the final edited and published work
    see https://doi.org/10.1021/acs.jpclett.3c03507
  identifier: http://rightsstatements.org/vocab/InC/1.0/

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo

start_date: 2024-04-11
end_date: 2025-04-11

## Journal

- title: The Journal of Physical Chemistry Letters
  issn: '19487185'
  start_page: 3772
  end_page: 3778

## Conference



## Related item



## Funding



## Instrument



## Instrument operator



## Instrument managing organization



## Measurement method



## Specimen



## Chemical composition



## Structure for specimen



## Structural feature for specimen



## Specific property for specimen



## Process for specimen treatment



## Computational method



## Energy level/transition state



## Software



## Custom property



## Fileset

- id: 1de710e8-b859-46d3-9e4d-d758aa620350
  filename: Atomic-Scale Multimodal Characterization of Self-Assembled InAs-InGaAlAs
    Quantum Dots.pdf
  content_type: application/pdf
  size: 1072708
  md5: dc45a16554d762a91ff890792aa52ff4

## Thumbnail

fileset_id: 1de710e8-b859-46d3-9e4d-d758aa620350
filename: Atomic-Scale Multimodal Characterization of Self-Assembled InAs-InGaAlAs
  Quantum Dots.pdf