# Actuator-driven, purge-free formaldehyde gas sensor based on single-walled carbon nanotubes

https://mdr.nims.go.jp/datasets/62c36aca-ebcc-45de-9046-e3d6d63fc889

## Files

- [nanomaterials-15-00962.pdf](https://mdr.nims.go.jp/filesets/cc89105c-5e20-481d-8081-81086037443d/download) ([Detail](https://mdr.nims.go.jp/filesets/cc89105c-5e20-481d-8081-81086037443d.md))
- [nanomaterials-3673268-supplementary.pdf](https://mdr.nims.go.jp/filesets/627053b9-324a-4de0-acd1-c50eac64a1a6/download) ([Detail](https://mdr.nims.go.jp/filesets/627053b9-324a-4de0-acd1-c50eac64a1a6.md))

## Id

62c36aca-ebcc-45de-9046-e3d6d63fc889

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2025-06-22T01:55:29.817897Z

## Updated at

2025-06-24T07:30:31.051413Z

## Published at

2025-06-24T07:23:25.539632Z

## Doi



## First published url

https://doi.org/10.3390/nano15130962

## Date published

2025-06-21

## Recorded date published



## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: Actuator-driven, purge-free formaldehyde gas sensor based on single-walled
    carbon nanotubes
  title_type: original
  lang: en

## Description

- description: Here we report an actuator-driven, purge-free chemiresistive gas sensor
    that is capable of reliably detecting 0.05 ppm HCHO in the air. The sensor is
    composed of an HCHO→HCl converter (powdery hydroxylamine salt, HA), an HCl detector
    (SWCNT-based chemiresistor), and an HCl blocker (thin plastic plate). Upon exposure
    to HCHO, the HA emits HCl vapor, which diffuses onto the adjacent SWCNT and increases
    its electric conductivity through p-doping. Meanwhile, inserting a plastic plate
    between HA and SWCNTs makes the conductivity of SWCNTs insensitive to HCHO. Thus,
    under periodic actuation (insertion and removal) of the plastic plate, HCHO can
    be reliably detected in a wide concentration range (0.05-15 ppm), with excellent
    selectivity over other volatile organic compounds. The actuator-driven system
    is beneficial because the purge gas is unnecessary for sensor recovery and baseline
    correction. Moreover, since the response to HCHO is synchronized with the actuation
    timing of the plate, even small (~0.8%) responses to 0.05 ppm HCHO can be clearly
    separated from larger noise responses (>1%) caused by interfering effects and
    baseline drift. We believe that this work provides substantial insights into the
    practical implementation of nanomaterial-based chemiresistive gas sensors.
  description_type: abstract
  lang: eng

## Creator

- name: Shinsuke Ishihara
  role: author
  orcid: https://orcid.org/0000-0001-6854-6032
  organization: National Institute for Materials Science
  department: Research Center for Materials Nanoarchitectonics (MANA)/Nanomaterials
    Field/Frontier Molecules Group
- name: Mandeep K. Chahal
  role: author
  organization: National Institute for Materials Science
  department: International Center for Materials Nanoarchitectonics/Nano-Materials
    Field/Frontier Molecules Group
- name: Jan Labuta
  role: author
  orcid: https://orcid.org/0000-0002-8329-0634
  organization: National Institute for Materials Science
  department: Research Center for Materials Nanoarchitectonics (MANA)/Nanomaterials
    Field/Functional Chromophores Group
- name: Takeshi Tanaka
  role: author
  organization: AIST
- name: Hiromichi Kataura
  role: author
  organization: AIST
- name: Jonathan P. Hill
  role: author
  orcid: https://orcid.org/0000-0002-4229-5842
  organization: National Institute for Materials Science
  department: Research Center for Materials Nanoarchitectonics (MANA)/Nanomaterials
    Field/Functional Chromophores Group
- name: Takashi Nakanishi
  role: author
  orcid: https://orcid.org/0000-0002-8744-782X
  organization: National Institute for Materials Science
  department: Research Center for Materials Nanoarchitectonics (MANA)/Nanomaterials
    Field/Frontier Molecules Group

## Contact agent



## Publisher

organization: MDPI

## Managing organization



## Keyword

- subject: sensor
  schema: not_defined

## Rights

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

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: NANOMATERIALS
  issn: '20794991'
  volume: '15'
  issue: '13'
  article_number: '962'

## 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: cc89105c-5e20-481d-8081-81086037443d
  filename: nanomaterials-15-00962.pdf
  content_type: application/pdf
  size: 2986777
  md5: 532acba6449eff50e9eb469938141e6c
- id: 627053b9-324a-4de0-acd1-c50eac64a1a6
  filename: nanomaterials-3673268-supplementary.pdf
  content_type: application/pdf
  size: 1439768
  md5: 9b772621335a70cc5a35a3b9c674dca8

## Thumbnail

fileset_id: cc89105c-5e20-481d-8081-81086037443d
filename: nanomaterials-15-00962.pdf