# Rare-Earth-Metal-Free Solid-State Fluorescent Carbonized-Polymer Microspheres for Unclonable Anti-Counterfeit Whispering-Gallery Emissions from Red to Near-Infrared Wavelengths

https://mdr.nims.go.jp/datasets/b9f55102-b3e7-4519-a0b0-360ecf97ebc2

## File

- [Barman(NIMS)_CPM_Adv Sci_2024.pdf](https://mdr.nims.go.jp/filesets/c8ff2b63-d1ee-449b-b9fa-a98ae25b5434/download) ([Detail](https://mdr.nims.go.jp/filesets/c8ff2b63-d1ee-449b-b9fa-a98ae25b5434.md))

## Id

b9f55102-b3e7-4519-a0b0-360ecf97ebc2

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2024-07-04T06:36:37.597779Z

## Updated at

2024-11-13T07:30:31.394835Z

## Published at

2024-11-13T07:30:31.503649Z

## Doi

https://doi.org/10.48505/nims.4952

## First published url

https://doi.org/10.1002/advs.202400693

## Date published

2024-06-12

## Recorded date published

2024-8

## Resource type

journal_article

## Manuscript type

accepted_manuscript

## Collection



## Title

- title: Rare-Earth-Metal-Free Solid-State Fluorescent Carbonized-Polymer Microspheres
    for Unclonable Anti-Counterfeit Whispering-Gallery Emissions from Red to Near-Infrared
    Wavelengths
  title_type: original
  lang: en

## Description

- description: Colloidal carbon dots (CDs) have garnered much attention as metal-free
    photoluminescent nanomaterials, yet creation of solid-state fluorescent (SSF)
    materials emitting in the deep red (DR) to near-infrared (NIR) range poses a significant
    challenge with practical implications. To address this challenge and to engineer
    photonic functionalities, a micro-resonator architecture is developed using carbonized
    polymer microspheres (CPMs), evolved from conventional colloidal nanodots. Gram-scale
    production of CPMs utilizes controlled microscopic phase separation facilitated
    by natural peptide cross-linking during hydrothermal processing. The resulting
    microstructure effectively suppresses aggregation-induced quenching (AIQ), enabling
    strong solid-state light emission. Both experimental and theoretical analysis
    support a role for extended π conjugated polycyclic aromatic hydrocarbons (PAHs)
    trapped within these microstructures, which exhibit a progressive red shift in
    light absorption/emission toward the NIR range. Moreover, the highly spherical
    shape of CPMs endows them with innate photonic functionalities in combination
    with their intrinsic CD-based attributes. Harnessing their excitation wavelength-dependent
    photoluminescent (PL) property, a single CPM exhibits whispering-gallery modes
    (WGMs) that are emission-tunable from the DR to the NIR. This type of newly developed
    microresonator can serve as, for example, unclonable anti-counterfeiting labels.
    This innovative cross-cutting approach, combining photonics and chemistry, offers
    robust, bottom-up, built-in photonic functionality with diverse NIR applications.
  description_type: abstract
  lang: eng

## Creator

- name: Barun Kumar Barman
  role: author
  orcid: https://orcid.org/0000-0002-9894-1890
  organization: National Institute for Materials Science
  department: Research Center for Materials Nanoarchitectonics (MANA)/Quantum Materials
    Field/Photonics Nano Engineering Group
  ror: https://ror.org/026v1ze26
- name: Hiroyuki Yamada
  role: author
  orcid: https://orcid.org/0000-0003-0394-857X
  organization: National Institute for Materials Science
  department: Research Center for Materials Nanoarchitectonics (MANA)/Quantum Materials
    Field/Photonics Nano Engineering Group
  ror: https://ror.org/026v1ze26
- name: Keisuke Watanabe
  role: author
  orcid: https://orcid.org/0000-0002-4285-2135
  organization: National Institute for Materials Science
  department: Research Center for Materials Nanoarchitectonics (MANA)/Quantum Materials
    Field/Photonics Nano Engineering Group
  ror: https://ror.org/026v1ze26
- name: Kenzo Deguchi
  role: author
  organization: National Institute for Materials Science
  department: Research Network and Facility Services Division/Materials Fabrication
    and Analysis Platform/High Magnetic Field Characterization Unit
  ror: https://ror.org/026v1ze26
- name: Shinobu Ohki
  role: author
  orcid: https://orcid.org/0000-0002-7357-3833
  organization: National Institute for Materials Science
  department: Research Network and Facility Services Division/Materials Fabrication
    and Analysis Platform/High Magnetic Field Characterization Unit
  ror: https://ror.org/026v1ze26
- name: Kenjiro Hashi
  role: author
  orcid: https://orcid.org/0000-0002-0320-4768
  organization: National Institute for Materials Science
  department: Center for Basic Research on Materials/Advanced Materials Characterization
    Field/Solid-State NMR Group
  ror: https://ror.org/026v1ze26
- name: Atsushi Goto
  role: author
  orcid: https://orcid.org/0000-0002-9472-4098
  organization: National Institute for Materials Science
  department: Center for Basic Research on Materials/Advanced Materials Characterization
    Field/Solid-State NMR Group
  ror: https://ror.org/026v1ze26
- name: Tadaaki Nagao
  role: author
  orcid: https://orcid.org/0000-0002-6746-2686
  organization: National Institute for Materials Science
  department: Research Center for Materials Nanoarchitectonics (MANA)/Quantum Materials
    Field/Photonics Nano Engineering Group
  ror: https://ror.org/026v1ze26

## Contact agent



## Publisher

organization: Wiley-Blackwell

## Managing organization



## Keyword

- subject: Carbonized polymer microsphere
  schema: not_defined
- subject: Rare earth free
  schema: not_defined
- subject: fluorescence
  schema: not_defined
- subject: multicolor emission
  schema: not_defined
- subject: near-infrared
  schema: not_defined
- subject: encoded-anti-counterfeit
  schema: not_defined
- subject: ecofriendly
  schema: not_defined

## Rights

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

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: Advanced Science
  issn: '21983844'
  volume: '11'
  issue: '30'
  article_number: '2400693'

## Conference



## Related item



## Funding

- identifier: 24K17589
  funder_name: JSPS
  description: Chromaticity-adaptive direct white light generation from luminescent
    carbogenic nanomaterials coupled with nanophotonic cavity

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## Fileset

- id: c8ff2b63-d1ee-449b-b9fa-a98ae25b5434
  filename: Barman(NIMS)_CPM_Adv Sci_2024.pdf
  content_type: application/pdf
  size: 2234224
  md5: d88e66bc5641b2044af1cebc0622b799

## Thumbnail

fileset_id: c8ff2b63-d1ee-449b-b9fa-a98ae25b5434
filename: Barman(NIMS)_CPM_Adv Sci_2024.pdf