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Related Experiment Video

Updated: Jun 26, 2026

Removal of Trace Elements by Cupric Oxide Nanoparticles from Uranium In Situ Recovery Bleed Water and Its Effect on Cell Viability

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Enhancing Biocidal Capability in Cuprite Coatings.

Brian T Lejeune¹, Xiaoyu Zhang², Su Sun¹

¹Department of Chemical Engineering, Northeastern University, 360 Huntington Ave, Boston, Massachusetts 02115, United States.

ACS Biomaterials Science & Engineering

|June 2, 2023

Summary

This summary is machine-generated.

Nanostructured cuprous oxide (Cu2O) coatings exhibit enhanced passive contact-kill antibacterial activity against E. coli. This improved performance, achieved through cryomechanical processing, offers a durable and cost-effective solution for public surfaces.

Keywords:

antimicrobial coatings biocidal contact-kill cryomechanical processing lattice defects

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Area of Science:

Materials Science
Nanotechnology
Antimicrobial Surfaces

Background:

The SARS-CoV-2 pandemic highlighted the need for effective antipathogenic coatings on high-touch surfaces.
Metallic copper's contact-kill properties are known, but those of its oxide forms are less understood.

Purpose of the Study:

To investigate the antipathogenic capabilities of nanostructured cuprous oxide (Cu2O).
To explore the effect of cryomechanical processing on Cu2O's biocidal activity.

Main Methods:

Commercial cuprous oxide powder was nanostructured using high-energy cryomechanical processing.
Coatings were prepared from processed and unprocessed Cu2O powders.
Bioassays were conducted using Escherichia coli (E. coli) to assess antibacterial efficacy.

Main Results:

Coatings from processed Cu2O showed a 4x faster contact-kill response against E. coli compared to unprocessed powder.
Over 99.999% E. coli reduction was achieved within 2 hours; 99% reduction within 30 minutes.
Enhanced activity correlated with induced crystallographic disorder and microstrain in the Cu2O lattice.

Conclusions:

Cryomechanical processing significantly enhances the passive antibacterial contact-kill capability of cuprous oxide.
The resulting hydrophobic coatings are effective without external energy input.
Optimizing lattice-defective Cu2O exposure could further improve antipathogenic surface applications.