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Schio AL, de Lima MS, Frassini R, Scariot FJ, Cemin F, Elois MA, Alvarez F, Michels AF, Fongaro G, Roesch-Ely M, Figueroa CA. Light, Copper, Action: Visible-Light Illumination Enhances Bactericidal Activity of Copper Particles. ACS Biomater Sci Eng 2024; 10:1808-1818. [PMID: 38411100 DOI: 10.1021/acsbiomaterials.3c01873] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/28/2024]
Abstract
Bacteria are an old concern to human health, as they are responsible for nosocomial infections, and the number of antibiotic-resistant microorganisms keeps growing. Copper is known for its intrinsic biocidal properties, and therefore, it is a promising material to combat infections when added to surfaces. However, its biocidal properties in the presence of light illumination have not been fully explored, especially regarding the use of microsized particles since nanoparticles have taken over all fields of research and subjugated microparticles despite them being abundant and less expensive. Thus, the present work studied the bactericidal properties of metallic copper particles, in microscale (CuMPs) and nanoscale (CuNPs), in the absence of light and under white LED light illumination. The minimum bactericidal concentration (MBC) of CuMPs against Staphylococcus aureus that achieved a 6-log reduction was 5.0 and 2.5 mg mL-1 for assays conducted in the absence of light and under light illumination, respectively. Similar behavior was observed against Escherichia coli. The bactericidal activity under illumination provided a percentage increase in log reduction values of 65.2% for S. aureus and 166.7% for E. coli when compared to the assays under dark. This assay reproduced the testing CuNPs, which showed superior bactericidal activity since the concentration of 2.5 mg mL-1 promoted a 6-log reduction of both bacteria even under dark. Its superior bactericidal activity, which overcame the effect of illumination, was expected once the nanoscale facilitated the interaction of copper within the surface of bacteria. The results from MBC were supported by fluorescence microscopy and atomic absorption spectroscopy. Therefore, CuMPs and CuNPs proved to have size- and dose-dependent biocidal activity. However, we have shown that CuMPs photoactivity is competitive compared to that of CuNPs, allowing their application as a self-cleaning material for disinfection processes assisted by conventional light sources without additives to contain the spread of pathogens.
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Affiliation(s)
- Aline L Schio
- Postgraduate Program in Materials Science and Engineering, University of Caxias do Sul, Caxias do Sul 95070-560, Rio Grande do Sul, Brazil
| | - Michele S de Lima
- Postgraduate Program in Materials Science and Engineering, University of Caxias do Sul, Caxias do Sul 95070-560, Rio Grande do Sul, Brazil
| | - Rafaele Frassini
- Biotechnology Institute, University of Caxias do Sul, Caxias do Sul 95070-560, Rio Grande do Sul, Brazil
| | - Fernando Joel Scariot
- Biotechnology Institute, University of Caxias do Sul, Caxias do Sul 95070-560, Rio Grande do Sul, Brazil
| | - Felipe Cemin
- "Gleb Wataghin" Institute of Physics, State University of Campinas, Campinas 13083-859, São Paulo, Brazil
| | - Mariana A Elois
- Department of Microbiology, Immunology, and Parasitology, Federal University of Santa Catarina, Florianópolis 88040-900, Brazil
| | - Fernando Alvarez
- "Gleb Wataghin" Institute of Physics, State University of Campinas, Campinas 13083-859, São Paulo, Brazil
| | - Alexandre F Michels
- Postgraduate Program in Materials Science and Engineering, University of Caxias do Sul, Caxias do Sul 95070-560, Rio Grande do Sul, Brazil
| | - Gislaine Fongaro
- Department of Microbiology, Immunology, and Parasitology, Federal University of Santa Catarina, Florianópolis 88040-900, Brazil
| | - Mariana Roesch-Ely
- Postgraduate Program in Materials Science and Engineering, University of Caxias do Sul, Caxias do Sul 95070-560, Rio Grande do Sul, Brazil
- Biotechnology Institute, University of Caxias do Sul, Caxias do Sul 95070-560, Rio Grande do Sul, Brazil
| | - Carlos A Figueroa
- Postgraduate Program in Materials Science and Engineering, University of Caxias do Sul, Caxias do Sul 95070-560, Rio Grande do Sul, Brazil
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Wang X, Hung TF, Chen FR, Wang WX. In Situ Tracking of Crystal-Surface-Dependent Cu 2O Nanoparticle Dissolution in an Aqueous Environment. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:1006-1016. [PMID: 36598407 DOI: 10.1021/acs.est.2c07845] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Metal-oxide-based nanoparticles (MONPs) such as Cu2O NPs have attracted growing attention, but the potential discharges of MONPs have raised considerable concern of their environmental fate including their dissolution behavior. The impacts of morphology on MONP dissolution are largely uncertain due to the lack of in situ tracking techniques. In this study, we combined a series of in situ technologies including liquid-cell transmission electron microscopy and fluorescence probes to reveal the in situ dissolution process of Cu2O NPs in freshwater. Our results suggest that cubic Cu2O NPs exhibit a higher dissolution quantity compared with spherical NPs of the same surface area. The difference was mainly related to the crystal surface, while other factors such as particle size or aggregation status showed minor effects. Importantly, we demonstrated the simultaneous growth of new small NPs and the dissolution of pristine Cu2O NPs during the dissolution of Cu2O NPs. Cubic Cu2O NPs became much less soluble under O2-limited conditions, suggesting that O2 concentration largely affected the dependence of dissolution on the NP morphology. Our findings highlight the potential application of in situ techniques to track the environmental fates of MONPs, which would provide important information for assessing the ecological risks of engineered NPs.
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Affiliation(s)
- Xiangrui Wang
- School of Energy and Environment and State Key Laboratory of Marine Pollution, City University of Hong Kong, Kowloon, Hong Kong, China
- Research Centre for the Oceans and Human Health, City University of Hong Kong Shenzhen Research Institute, Shenzhen518057, China
| | - Tak-Fu Hung
- Department of Materials Science and Engineering, City University of Hong Kong, Kowloon, Hong Kong
| | - Fu-Rong Chen
- Department of Materials Science and Engineering, City University of Hong Kong, Kowloon, Hong Kong
| | - Wen-Xiong Wang
- School of Energy and Environment and State Key Laboratory of Marine Pollution, City University of Hong Kong, Kowloon, Hong Kong, China
- Research Centre for the Oceans and Human Health, City University of Hong Kong Shenzhen Research Institute, Shenzhen518057, China
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Fasna PHF, Sasi S, Sharmila TKB, Chandra CSJ, Antony JV, Raman V. Photocatalytic remediation of methylene blue and antibacterial activity study using Schiff base-Cu complexes. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:54318-54329. [PMID: 35296999 DOI: 10.1007/s11356-022-19694-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Accepted: 03/09/2022] [Indexed: 06/14/2023]
Abstract
This work describes the design of novel Cu(II) complexes and their application in the photocatalytic degradation of methylene blue (MB). The same photocatalyst exhibits antibacterial activity against Escherichia coli (gram-negative) and Bacillus circulans (gram-positive). The characterisation of the photocatalysts has been done by several up-to-date physical methods. The rationale behind the photocatalysts' beneficial intervention is discussed in this study. Statistical analysis of the degradation of MB is done using a one-way ANOVA, and the significance of means is determined by a multiple comparison test using Turkey HSD. Also, the degradation of MB follows pseudo first-order kinetics with high correlation coefficient values (R2 > 0.95), making them useful as simple and low-cost organic dye degradation agents.
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Affiliation(s)
- P H Fathima Fasna
- Department of Chemistry, Maharaja's College, Park Avenue Road, Ernakulam, Kerala, 682011, India
| | - Sreesha Sasi
- Department of Chemistry, Maharaja's College, Park Avenue Road, Ernakulam, Kerala, 682011, India.
| | - T K Bindu Sharmila
- Department of Chemistry, Maharaja's College, Park Avenue Road, Ernakulam, Kerala, 682011, India
| | - C S Julie Chandra
- Department of Chemistry, Maharaja's College, Park Avenue Road, Ernakulam, Kerala, 682011, India
| | - Jolly V Antony
- Department of Chemistry, Maharaja's College, Park Avenue Road, Ernakulam, Kerala, 682011, India
| | - Vidya Raman
- Department of Chemistry, TMJM Government College, Kerala, Manimalakunnu Koothattukulam, India
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Manikandan DB, Arumugam M, Veeran S, Sridhar A, Krishnasamy Sekar R, Perumalsamy B, Ramasamy T. Biofabrication of ecofriendly copper oxide nanoparticles using Ocimum americanum aqueous leaf extract: analysis of in vitro antibacterial, anticancer, and photocatalytic activities. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:33927-33941. [PMID: 33410001 DOI: 10.1007/s11356-020-12108-w] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Accepted: 12/14/2020] [Indexed: 06/12/2023]
Abstract
Nanotechnology tends to be a swiftly growing field of research that actively influences and inhibits the growth of bacteria/cancer. Noble metal nanoparticles (NPs) such as silver, copper, and gold have been used to damage bacterial and cancer growth over recent years; however, the toxicity of higher NPs concentrations remains a major issue. The copper oxide nanoparticles (CuONPs) were therefore fabricated using a simple green chemistry approach. Biofabricated CuONPs were characterized using UV-visible, FE-SEM with EDS, HR-TEM, FT-IR, XRD, Raman spectroscopy, and XPS analysis. Formations of CuONPs have been observed by UV-visible absorbance peak at 360.74 nm. The surface morphology of the CuONPs showed the spherical structure and size (~ 68 nm). The EDS spectrum of CuONPs has proved to be the key signals of copper (Cu) and oxygen (O) components. FT-IR analysis, to validate the important functional biomolecules (O-H, C=C, C-H, C-O) are responsible for reduction and stabilization of CuONPs. The monoclinic end-centered crystalline structures of CuONPs were confirmed with XRD planes. The electrochemical oxygen states of the CuONPs have been studied using spectroscopy of the Raman and X-ray photoelectron. After successful preparation, CuONPs examined their antibacterial, anticancer, and photocatalytic activities. Green-fabricated CuONPs were promising antibacterial candidate against human pathogenic gram-negative bacteria Escherichia coli, Vibrio cholerae, Salmonella typhimurium, Klebsiella pneumoniae, Aeromonas hydrophila, and Pseudomonas aeruginosa. CuONPs were demonstrated the excellent anticancer activity against A549 human lung adenocarcinoma cell line. Furthermore, CuONPs exhibited photocatalytic degradation of azo dyes such as eosin yellow (EY), rhodamine 123 (Rh 123), and methylene blue (MB). Biofabricated CuONPs may therefore be an important biomedical research for the aid of bacterial/cancer diseases and photocatalytic degradation of azo dyes.
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Affiliation(s)
- Dinesh Babu Manikandan
- Laboratory of Aquabiotics/Nanoscience, Department of Animal Science, School of Life Sciences, Bharathidasan University, Tiruchirappalli, Tamil Nadu, 620 024, India
| | - Manikandan Arumugam
- Laboratory of Aquabiotics/Nanoscience, Department of Animal Science, School of Life Sciences, Bharathidasan University, Tiruchirappalli, Tamil Nadu, 620 024, India
| | - Srinivasan Veeran
- Laboratory of Aquabiotics/Nanoscience, Department of Animal Science, School of Life Sciences, Bharathidasan University, Tiruchirappalli, Tamil Nadu, 620 024, India
| | - Arun Sridhar
- Laboratory of Aquabiotics/Nanoscience, Department of Animal Science, School of Life Sciences, Bharathidasan University, Tiruchirappalli, Tamil Nadu, 620 024, India
| | - Rajkumar Krishnasamy Sekar
- Laboratory of Aquabiotics/Nanoscience, Department of Animal Science, School of Life Sciences, Bharathidasan University, Tiruchirappalli, Tamil Nadu, 620 024, India
| | - Balaji Perumalsamy
- National Centre for Alternatives to Animal Experiments, Bharathidasan University, Tiruchirappalli, Tamil Nadu, 620 024, India
| | - Thirumurugan Ramasamy
- Laboratory of Aquabiotics/Nanoscience, Department of Animal Science, School of Life Sciences, Bharathidasan University, Tiruchirappalli, Tamil Nadu, 620 024, India.
- National Centre for Alternatives to Animal Experiments, Bharathidasan University, Tiruchirappalli, Tamil Nadu, 620 024, India.
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Update on Interfacial Charge Transfer (IFTC) Processes on Films Inactivating Viruses/Bacteria under Visible Light: Mechanistic Considerations and Critical Issues. Catalysts 2021. [DOI: 10.3390/catal11020201] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
This review presents an update describing binary and ternary semiconductors involving interfacial charge transfer (IFCT) in composites made up by TiO2, CuO, Ag2O and Fe2O3 used in microbial disinfection (bacteria and viruses). The disinfection mechanism, kinetics and generation of reactive oxygen species (ROS) in solution under solar/visible light are discussed. The surface properties of the photocatalysts and their active catalytic sites are described in detail. Pathogenic biofilm inactivation by photocatalytic thin films is addressed since biofilms are the most dangerous agents of spreading pathogens into the environment.
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Architectured Cu–TNTZ Bilayered Coatings Showing Bacterial Inactivation under Indoor Light and Controllable Copper Release: Effect of the Microstructure on Copper Diffusion. COATINGS 2020. [DOI: 10.3390/coatings10060574] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
A Ti–23Nb–0.7Ta–2Zr–1.2O alloy (at %), called “gum metal”, was deposited by direct-current magnetron sputtering (DCMS) on an under layer of copper. By varying the working pressure during the deposition, columnar TNTZ (Ti–Nb–Ta–Zr) nanoarchitectures were obtained. At low working pressures, the upper layer was dense with a coarse surface (Ra = 12 nm) with a maximum height of 163 nm; however, the other samples prepared at high working pressures showed columnar architectures with voids and an average roughness of 4 nm. The prepared coatings were characterized using atomic force microscopy (AFM) for surface topography, energy dispersive X-ray spectroscopy (EDX) for atomic mapping, scanning electron microscopy (SEM) for cross-section imaging, contact angle measurements for hydrophilic/hydrophobic balance of the prepared surfaces, and X-ray diffraction (XRD) for the crystallographic structures of the prepared coatings. The morphology and the density of the prepared coatings were seen to influence the hydrophilic properties of the surface. The antibacterial activity of the prepared coatings was tested in the dark and under low-intensity indoor light. Bacterial inactivation was seen to happen in the dark from samples presenting columnar nanoarchitectures. This was attributed to the diffusion of copper ions from the under layer. To verify the copper release from the prepared samples, an inductively coupled plasma mass spectrometer (ICP-MS) was used. Additionally, the atomic depth profiling of the elements was carried out by X-ray photoelectron spectroscopy (XPS) for the as-prepared samples and for the samples used for bacterial inactivation. The low amount of copper in the bulk of the TNTZ upper layer justifies its diffusion to the surface. Recycling of the antibacterial activity was also investigated and revealed a stable activity over cycles.
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