# Coalescence of carbon nanotubes while preserving the chiral angles

https://mdr.nims.go.jp/datasets/d44f2589-e40f-4299-a208-b432bbd56dd6

## File

- [s41467-025-56389-6.pdf](https://mdr.nims.go.jp/filesets/dabc93a2-b606-4205-b430-ec66e27b32fd/download) ([Detail](https://mdr.nims.go.jp/filesets/dabc93a2-b606-4205-b430-ec66e27b32fd.md))

## Id

d44f2589-e40f-4299-a208-b432bbd56dd6

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2025-02-20T12:20:50.615062Z

## Updated at

2025-02-23T13:51:22.799095Z

## Published at

2025-02-23T13:51:22.876136Z

## Doi



## First published url

https://doi.org/10.1038/s41467-025-56389-6

## Date published

2025-02-05

## Recorded date published



## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: Coalescence of carbon nanotubes while preserving the chiral angles
  title_type: original
  lang: en

## Description

- description: Atomically precise coalescence of graphitic nanocarbon molecules is
    one of the most challenging reactions in sp2 carbon chemistry. Here, we demonstrate
    that two carbon nanotubes with the same chiral indices (n, m) are efficiently
    coalesced into a single (2n, 2m) nanotube with preserved chiral angles via heat
    treatment at less than 1000°C. The (2n, 2m) nanotubes constituted up to ~20%–40%
    of the final sample in the most efficient case. New optical absorption peaks of
    the (2n, 2m) nanotubes emerged, indicating that the reaction occurred over the
    entire sample. The reaction efficiency strongly depended on the chiral angle,
    implying that C–C bond cleavage and recombination occurred sequentially. Furthermore,
    we found that the reaction occurs efficiently even at 600°C in an atmosphere containing
    trace amounts of oxygen. These findings offer new routes for the structure-selective
    synthesis of large-diameter nanotubes and drastic modification of the properties
    of nanotube assemblies via postprocessing.
  description_type: abstract
  lang: und

## Creator

- name: Akira Takakura
  role: author
  orcid: https://orcid.org/0009-0004-3639-2330
- name: Taishi Nishihara
  role: author
  orcid: https://orcid.org/0000-0001-6973-2005
- name: Koji Harano
  role: author
  orcid: https://orcid.org/0000-0001-6800-8023
- name: Ovidiu Cretu
  role: author
  orcid: https://orcid.org/0000-0002-1822-8172
- name: Takeshi Tanaka
  role: author
  orcid: https://orcid.org/0000-0001-7547-7928
- name: Hiromichi Kataura
  role: author
  orcid: https://orcid.org/0000-0002-4777-0622
- name: Yuhei Miyauchi
  role: author
  orcid: https://orcid.org/0000-0002-0945-0265

## Contact agent



## Publisher

organization: Springer Science and Business Media LLC

## Managing organization



## Keyword

- subject: carbon nanotubes
  schema: not_defined
- subject: electron microscopy
  schema: not_defined
- subject: Raman spectroscopy
  schema: not_defined
- subject: optical spectroscopy
  schema: not_defined

## Rights

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

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: Nature Communications
  issn: '20411723'
  volume: '16'
  issue: '1'
  article_number: '1093'

## Conference



## Related item



## Funding

- identifier: JPMJCR18I5
  funder_name: MEXT | JST | Core Research for Evolutional Science and Technology
- identifier: JP22K18287
  funder_name: MEXT | Japan Society for the Promotion of Science
- identifier: JP24H00044
  funder_name: MEXT | Japan Society for the Promotion of Science
- identifier: JP23H01791
  funder_name: MEXT | Japan Society for the Promotion of Science
- identifier: JP23H04874
  funder_name: MEXT | Japan Society for the Promotion of Science
- identifier: JP24K08253
  funder_name: MEXT | Japan Society for the Promotion of Science
- identifier: JPMJFR222N
  funder_name: MEXT | Japan Science and Technology Agency

## Instrument



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## Measurement method



## Specimen



## Chemical composition



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## Fileset

- id: dabc93a2-b606-4205-b430-ec66e27b32fd
  filename: s41467-025-56389-6.pdf
  content_type: application/pdf
  size: 1815048
  md5: f8ffa31f4eabaa54472ea8861fe363e1

## Thumbnail

fileset_id: dabc93a2-b606-4205-b430-ec66e27b32fd
filename: s41467-025-56389-6.pdf