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Lejeune B, Zhang X, Sun S, Hines J, Jinn KW, Reilly AN, Clark HA, Lewis LH. Enhancing Biocidal Capability in Cuprite Coatings. ACS Biomater Sci Eng 2023; 9:4178-4186. [PMID: 37267510 PMCID: PMC10620754 DOI: 10.1021/acsbiomaterials.2c01222] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Accepted: 05/12/2023] [Indexed: 06/04/2023]
Abstract
The SARS-CoV-2 global pandemic has reinvigorated interest in the creation and widespread deployment of durable, cost-effective, and environmentally benign antipathogenic coatings for high-touch public surfaces. While the contact-kill capability and mechanism of metallic copper and its alloys are well established, the biocidal activity of the refractory oxide forms remains poorly understood. In this study, commercial cuprous oxide (Cu2O, cuprite) powder was rapidly nanostructured using high-energy cryomechanical processing. Coatings made from these processed powders demonstrated a passive "contact-kill" response to Escherichia coli (E. coli) bacteria that was 4× (400%) faster than coatings made from unprocessed powder. No viable bacteria (>99.999% (5-log10) reduction) were detected in bioassays performed after two hours of exposure of E. coli to coatings of processed cuprous oxide, while a greater than 99% bacterial reduction was achieved within 30 min of exposure. Further, these coatings were hydrophobic and no external energy input was required to activate their contact-kill capability. The upregulated antibacterial response of the processed powders is positively correlated with extensive induced crystallographic disorder and microstrain in the Cu2O lattice accompanied by color changes that are consistent with an increased semiconducting bandgap energy. It is deduced that cryomilling creates well-crystallized nanoscale regions enmeshed within the highly lattice-defective particle matrix. Increasing the relative proportion of lattice-defective cuprous oxide exposed to the environment at the coating surface is anticipated to further enhance the antipathogenic capability of this abundant, inexpensive, robust, and easily handled material for wider application in contact-kill surfaces.
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Affiliation(s)
- Brian
T. Lejeune
- Department
of Chemical Engineering, Northeastern University, 360 Huntington Ave, Boston, Massachusetts 02115, United States
| | - Xiaoyu Zhang
- Department
of Mechanical and Industrial Engineering, Northeastern University, 360 Huntington Ave, Boston, Massachusetts 02115, United States
| | - Su Sun
- Department
of Chemical Engineering, Northeastern University, 360 Huntington Ave, Boston, Massachusetts 02115, United States
| | - Julia Hines
- Department
of Chemical Engineering, Northeastern University, 360 Huntington Ave, Boston, Massachusetts 02115, United States
| | - Kevin W. Jinn
- Department
of Chemical Engineering, Northeastern University, 360 Huntington Ave, Boston, Massachusetts 02115, United States
| | - Ashlyn Neal Reilly
- Department
of Bioengineering, Northeastern University, 360 Huntington Ave, Boston, Massachusetts 02115, United States
| | - Heather A. Clark
- Department
of Bioengineering, Northeastern University, 360 Huntington Ave, Boston, Massachusetts 02115, United States
- Department
of Chemistry, Northeastern University, 360 Huntington Ave, Boston, Massachusetts 02115, United States
| | - Laura H. Lewis
- Department
of Chemical Engineering, Northeastern University, 360 Huntington Ave, Boston, Massachusetts 02115, United States
- Department
of Mechanical and Industrial Engineering, Northeastern University, 360 Huntington Ave, Boston, Massachusetts 02115, United States
- The
George J. Kostas Research Institute for Homeland Security, Northeastern University, 360 Huntington Ave, Boston, Massachusetts 02115, United States
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Chatterjee S, Das P, Giri PK, Manju U, Besra L, Basu S. Alteration of Wettability of Copper-Copper Oxide Nanocomposites through Cu-O Bond Breaking Swayed by Ultraviolet and Electron Irradiation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:3299-3308. [PMID: 33711234 DOI: 10.1021/acs.langmuir.0c03180] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Converting a nonwetting surface to a highly wetting one, aided by ultraviolet radiation, is well explored. Here, in this work, we show just the reverse behavior of a copper-copper oxide nanocomposite surface where ultraviolet radiation turned the superhydrophilic surface to a superhydrophobic one. This observation is explained both experimentally and theoretically using first-principles density functional theory-based calculations considering the metal-oxygen (Cu-O) bond breaking and related change in surface chemistry. This observation has further been corroborated with electron irradiation on the same nanocomposite material. To the best of our knowledge, for the first time, we show that the radiation-induced breaking of the copper-oxygen bond makes the nanostructure surface energetically unfavorable for water adsorption.
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Affiliation(s)
- Sriparna Chatterjee
- CSIR-Institute of Minerals and Materials Technology, Bhubaneswar 751013, Odisha, India
| | - Pritam Das
- School of Basic Sciences, Indian Institute of Technology Bhubaneswar, Jatni 752050, Odisha, India
| | - Pratibha K Giri
- Department of Chemistry, College of Engineering and Technology, Bhubaneswar 751003, Odisha, India
| | - Unnikrishnan Manju
- CSIR-Institute of Minerals and Materials Technology, Bhubaneswar 751013, Odisha, India
| | - Laxmidhar Besra
- CSIR-Institute of Minerals and Materials Technology, Bhubaneswar 751013, Odisha, India
| | - Suddhasatwa Basu
- CSIR-Institute of Minerals and Materials Technology, Bhubaneswar 751013, Odisha, India
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