# Chiral Honeycomb Lattices of Nonplanar π-Conjugated Supramolecules with Protected Dirac and Flat Bands

https://mdr.nims.go.jp/datasets/1881d37d-b005-4d38-a2ae-065b8951a408

## File

- [manuscript6.pdf](https://mdr.nims.go.jp/filesets/31c6c286-7c1f-4935-ab14-c9195d7922a8/download) ([Detail](https://mdr.nims.go.jp/filesets/31c6c286-7c1f-4935-ab14-c9195d7922a8.md))

## Id

1881d37d-b005-4d38-a2ae-065b8951a408

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2024-08-05T03:56:08.912480Z

## Updated at

2025-06-29T23:30:16.726259Z

## Published at

2025-06-29T23:18:07.724719Z

## Doi

https://doi.org/10.48505/nims.4625

## First published url

https://doi.org/10.1021/acsnano.4c04496

## Date published

2024-06-30

## Recorded date published



## Resource type

journal_article

## Manuscript type

accepted_manuscript

## Collection



## Title

- title: Chiral Honeycomb Lattices of Nonplanar π-Conjugated Supramolecules with Protected
    Dirac and Flat Bands
  title_type: original
  lang: en

## Description

- description: The honeycomb lattice is a fundamental two-dimensional (2D) network
    that gives rise to surprisingly rich electronic properties. While its expansion
    to 2D supramolecular assembly is conceptually appealing, its realization is not
    straightforward because of weak intermolecular coupling and strong influence of
    a supporting substrate. Here we show that the application of a triptycene derivative
    with phenazine moieties, Trip-Phz, solves this problem due to its strong intermolecular
    π-π pancake bonding and non-planar geometry. Our scanning tunneling microscopy
    (STM) measurements demonstrate that Trip-Phz molecules self-assemble on a Ag(111)
    surface to form chiral and commensurate honeycomb lattices. Electronically, the
    network can be viewed as a hybrid of honeycomb and kagome lattices. The Dirac
    and flat bands predicted by a simple tight-binding model are reproduced by total
    density functional theory (DFT) calculations, highlighting the protection of the
    molecular bands from the Ag(111) substrate. The present work offers a rational
    route for creating chiral 2D supramolecules that can accommodate pristine Dirac
    and flat bands simultaneously.
  description_type: abstract
  lang: und

## Creator

- name: Ryohei Nemoto
  role: author
  orcid: https://orcid.org/0000-0002-7343-7268
- name: Ryuichi Arafune
  role: author
  orcid: https://orcid.org/0000-0003-4371-6116
- name: Saya Nakano
  role: author
- name: Masahisa Tsuchiizu
  role: author
  orcid: https://orcid.org/0009-0002-2975-8096
- name: Noriaki Takagi
  role: author
- name: Rie Suizu
  role: author
  orcid: https://orcid.org/0000-0001-7632-2186
- name: Takashi Uchihashi
  role: author
  orcid: https://orcid.org/0000-0003-0811-5665
- name: Kunio Awaga
  role: author
  orcid: https://orcid.org/0000-0002-2193-0747

## Contact agent



## Publisher

organization: American Chemical Society (ACS)

## Managing organization



## Keyword

- subject: Honeycomb lattice
  schema: not_defined
- subject: Kagome lattice
  schema: not_defined
- subject: self assembly
  schema: not_defined
- subject: scanning tunneling microscopy
  schema: not_defined
- subject: Dirac bands
  schema: not_defined
- subject: flat bands
  schema: not_defined
- subject: chirality
  schema: not_defined

## Rights

- description: This document is the Accepted Manuscript version of a Published Work
    that appeared in final form in ACS Nano, copyright © 2024 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/acsnano.4c04496
  identifier: http://rightsstatements.org/vocab/InC/1.0/

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo

start_date: 2024-06-30
end_date: 2025-06-30

## Journal

- title: ACS Nano
  issn: '19360851'
  volume: '18'
  issue: '30'

## Conference



## Related item



## Funding

- funder_name: Ministry of Education, Culture, Sports, Science and Technology
  description: World Premier International Research Center (WPI) Initiative on Materials
    Nanoarchitectonics
- identifier: JPMJPR21A9
  funder_name: Precursory Research for Embryonic Science and Technology
- identifier: 20H02707
  funder_name: Japan Society for the Promotion of Science
- identifier: 20H05621
  funder_name: Japan Society for the Promotion of Science
- identifier: 22H0196
  funder_name: Japan Society for the Promotion of Science

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## Fileset

- id: 31c6c286-7c1f-4935-ab14-c9195d7922a8
  filename: manuscript6.pdf
  content_type: application/pdf
  size: 1623948
  md5: 41fbc7828ad09e7480ec6b68c075f1da

## Thumbnail

fileset_id: 31c6c286-7c1f-4935-ab14-c9195d7922a8
filename: manuscript6.pdf