# Ultralong-Range Periodic Alignment and Structural Coloration of Titanate and Titanoniobate Nanosheets in Aqueous Dispersions

https://mdr.nims.go.jp/datasets/c00eb848-8182-45e2-86d9-7355b67c82de

## File

- [ultralong-range-periodic-alignment-and-structural-coloration-of-titanate-and-titanoniobate-nanosheets-in-aqueous.pdf](https://mdr.nims.go.jp/filesets/8ea4b723-0707-46a7-a2d2-50f5423dfd42/download) ([Detail](https://mdr.nims.go.jp/filesets/8ea4b723-0707-46a7-a2d2-50f5423dfd42.md))

## Id

c00eb848-8182-45e2-86d9-7355b67c82de

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2025-10-28T06:44:43.133877Z

## Updated at

2025-10-29T03:30:10.595804Z

## Published at

2025-10-29T03:17:10.225746Z

## Doi



## First published url

https://doi.org/10.1021/jacsau.5c01152

## Date published

2025-10-27

## Recorded date published

2025-10-27

## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: Ultralong-Range Periodic Alignment and Structural Coloration of Titanate
    and Titanoniobate Nanosheets in Aqueous Dispersions
  title_type: original
  lang: en

## Description

- description: Structural coloration has been reported for many types of two-dimensional
    materials including metal oxide nanosheets. In particular, metal oxide nanosheets
    are featured by a wealth of composition and structure, but their impact on structural
    color has not been explored. In the current study, we report structural coloration
    observed for aqueous suspensions of three types of transition metal oxide nanosheets
    (Ti1.73O41.08−, TiNbO5−, and Ti2NbO7−) obtained via exfoliation of precursory
    layered compounds with tetramethylammonium hydroxide (TMAOH). It was revealed
    that a minute amount of TMA+ was retained even after deionization via repeated
    centrifugation, acting as counter cations to the negatively charged nanosheets.
    This residual TMA+ ions contributed to stabilize the dispersion of nanosheets
    under low ionic strength conditions, while the intersheet spacing was expanded
    to a magnitude comparable to the wavelength of the visible light range, resulting
    in the structural coloration. The wavelength of structural colors was dependent
    not only on nanosheet concentration, but also on the type of nanosheets, correlating
    with the charge (zeta potential) and thickness of the nanosheets, as well as amounts
    of TMA+ dissociated from the nanosheet surfaces. Specifically, TiNbO5− was featured
    with the highest amount of TMA+ in the solution, which screened the negative charge
    of the nanosheets and resulted in the smallest intersheet spacing. On the other
    hand, when the dissociated amount of TMA+ was diminished, Ti2NbO7− with a larger
    thickness yielded a larger intersheet spacing than that of Ti1.73O41.08−. These
    findings provide a valuable clue to rational control of structural colors derived
    from nanosheets with different composition and structure for a wide range of applications.
  description_type: abstract
  lang: und

## Creator

- name: Takayuki Kikuchi
  role: author
  orcid: https://orcid.org/0000-0003-0588-2172
- name: Yasuo Ebina
  role: author
  orcid: https://orcid.org/0000-0003-3471-9825
- name: Nobuyuki Sakai
  role: author
  orcid: https://orcid.org/0000-0002-9395-6751
- name: Yoshiyuki Sugahara
  role: author
  orcid: https://orcid.org/0000-0003-2973-8052
- name: Takayoshi Sasaki
  role: author
  orcid: https://orcid.org/0000-0002-2872-0427
- name: Renzhi Ma
  role: author
  orcid: https://orcid.org/0000-0001-7126-2006

## Contact agent



## Publisher

organization: American Chemical Society (ACS)

## Managing organization



## Keyword

- subject: Structural coloration
  schema: not_defined
- subject: Liquid crystallinity
  schema: not_defined
- subject: Metal oxide nanosheets
  schema: not_defined
- subject: Surface charge
  schema: not_defined
- subject: Ionic strength
  schema: not_defined

## Rights

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

## Other identifier(s)



## Data origin



## Embargo



## Journal

- title: JACS Au
  issn: '26913704'
  volume: '5'
  issue: '10'
  start_page: 5207
  end_page: 5216

## Conference



## Related item



## Funding

- identifier: JPMJCR17N1
  funder_name: Core Research for Evolutional Science and Technology
- identifier: JPMJCR22B1
  funder_name: Core Research for Evolutional Science and Technology
- identifier: 22H01916
  funder_name: Japan Society for the Promotion of Science

## 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: 8ea4b723-0707-46a7-a2d2-50f5423dfd42
  filename: ultralong-range-periodic-alignment-and-structural-coloration-of-titanate-and-titanoniobate-nanosheets-in-aqueous.pdf
  content_type: application/pdf
  size: 8077492
  md5: 6681400e2a67c0194134830f53d234d0

## Thumbnail

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filename: ultralong-range-periodic-alignment-and-structural-coloration-of-titanate-and-titanoniobate-nanosheets-in-aqueous.pdf