# Effect of Humidity on Antibacterial Activity of Copper and Its Alloy Surfaces

https://mdr.nims.go.jp/datasets/67a1bc3e-028f-424d-a5f7-8437fa51e591

## File

- [MaterTrans67(2026)83-91.pdf](https://mdr.nims.go.jp/filesets/d9b191ce-ecfb-488e-a22f-c696ead5128f/download) ([Detail](https://mdr.nims.go.jp/filesets/d9b191ce-ecfb-488e-a22f-c696ead5128f.md))
- [MaterTrans67(2026)83-91_suppl.pdf](https://mdr.nims.go.jp/filesets/f91c3219-f9a9-4ba3-986a-983cb22ef3f9/download) ([Detail](https://mdr.nims.go.jp/filesets/f91c3219-f9a9-4ba3-986a-983cb22ef3f9.md))

## Id

67a1bc3e-028f-424d-a5f7-8437fa51e591

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2025-12-25T03:30:19.020106Z

## Updated at

2025-12-25T06:45:11.764557Z

## Published at

2025-12-25T23:19:17.214820Z

## Doi



## First published url

https://doi.org/10.2320/matertrans.mt-m2025099

## Date published

2026-01-01

## Recorded date published

2026

## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: Effect of Humidity on Antibacterial Activity of Copper and Its Alloy Surfaces
  title_type: original
  lang: en

## Description

- description: "Copper alloys have bactericidal activity and applied to touch surface
    to suppress the transmission of pathogens via material surface. The touch surface
    is exposed to real life conditions, which are lower in humidity than that in laboratory
    testing conditions. In this study, the antibacterial activity of copper and its
    alloys was systematically investigated by a method simulating droplet transmission
    under controlled humidity (60 and 35%RH) with Escherichia coli or Staphylococcus
    aureus. Corrosion rate of copper was estimated by electrochemical impedance spectroscopy
    under the controlled humidity. \r\nThe all materials decreased their antibacterial
    activity with reduction in humidity. At both high and low humidity, the materials
    with high copper contents had the higher antibacterial activity than those with
    lower copper contents. The corrosion rate of copper decreased with reduction in
    humidity, suggesting the importance of copper ion release at the surface for their
    antibacterial activity."
  description_type: abstract
  lang: und

## Creator

- name: Akiko Yamamoto
  role: author
  orcid: https://orcid.org/0000-0002-9182-4886
- name: Yuki Ito
  role: author

## Contact agent



## Publisher

organization: Japan Institute of Metals

## Managing organization



## Keyword

- subject: antibacterial tests
  schema: not_defined
- subject: copper and copper alloys
  schema: not_defined
- subject: relative humidity
  schema: not_defined
- subject: droplet transmission
  schema: not_defined
- subject: electrochemical impedance spectroscopy
  schema: not_defined

## Rights

- identifier: http://rightsstatements.org/vocab/InC/1.0/

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: MATERIALS TRANSACTIONS
  issn: '13459678'
  volume: '67'
  issue: '1'
  start_page: 83
  end_page: 91
  article_number: MT-M2025099

## 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: d9b191ce-ecfb-488e-a22f-c696ead5128f
  filename: MaterTrans67(2026)83-91.pdf
  content_type: application/pdf
  size: 1072761
  md5: 1f398caa90c3ba8207574f8a501d07e8
- id: f91c3219-f9a9-4ba3-986a-983cb22ef3f9
  filename: MaterTrans67(2026)83-91_suppl.pdf
  content_type: application/pdf
  size: 415362
  md5: 33d6eb0ad67f12fa5f80a7e77ffbdde6

## Thumbnail

fileset_id: d9b191ce-ecfb-488e-a22f-c696ead5128f
filename: MaterTrans67(2026)83-91.pdf