Phase formation prediction in magnetron sputtered Cu(Ti)Zn thin films: Numerical vs experimental approaches DOI Creative Commons

Dimitri Boivin,

Andrea Jagodar, Pascal Brault

et al.

Journal of Applied Physics, Journal Year: 2025, Volume and Issue: 137(14)

Published: April 8, 2025

In this work, we evaluated the ability of three numerical methods to predict phase formation in Cu–Zn binary and Cu–Ti–Zn ternary alloy thin films deposited by DC-magnetron sputter deposition. Molecular dynamics (MD) simulations were carried out simulate growth film study organization at atomic level. A Machine Learning (ML) approach trained with a recently published bulk HEA (high-entropy alloy) database was used determine presence an amorphous phase, solid solutions, or/and intermetallics. Finally, CALPHAD (CALculation PHAse Diagrams) thermodynamic modeling allows one diagrams. Crystalline phases formed experimental investigated grazing incidence x-ray diffraction (GIXRD). Comparison results highlights that for pure Ti or films, thermodynamically stable are films. Less agreement found low high percentage introduced system, drastic differences observed elemental compositions close equimolarity. those cases, equilibrium nature magnetron sputtering deposition technique is evidenced. The very limited between GIXRD ML explained available database, which exclusively based on alloys. Elemental composition does not itself stabilized phases: elaboration techniques be taken into account too. MD bring information possible segregation Zn element surface grain boundaries. good evidenced calculated patterns.

Language: Английский

Copper and Copper-Based Nanoparticles in Medicine—Perspectives and Challenges DOI Creative Commons
Marta J. Woźniak-Budych, Katarzyna Staszak, Maciej Staszak

et al.

Molecules, Journal Year: 2023, Volume and Issue: 28(18), P. 6687 - 6687

Published: Sept. 18, 2023

Nanotechnology has ushered in a new era of medical innovation, offering unique solutions to longstanding healthcare challenges. Among nanomaterials, copper and oxide nanoparticles stand out as promising candidates for multitude applications. This article aims provide contemporary insights into the perspectives challenges regarding use medicine. It summarises biomedical potential copper-based nanoformulations, including progress early-stage research, evaluate mitigate toxicity nanomaterials. The discussion covers prospects nanomaterials context their successful clinical translation. also addresses safety concerns, emphasizing need assessments nanomedicines. However, attention is needed solve current such biocompatibility controlled release. Ongoing research collaborative efforts overcome these obstacles are discussed. analysis guidance safe effective integration practice, thereby advancing recent literature highlighted multifaceted associated with translation from laboratory clinic. In particular, remains formidable hurdle, requiring innovative ensure seamless human body. Additionally, achieving release therapeutic agents poses complex challenge that requires meticulous engineering precise design.

Language: Английский

Citations

73
Antibacterial anodic aluminium oxide-copper coatings on aluminium alloys: preparation and long-term antibacterial performance DOI
Jiahuan Chen, Zhen He, Jiaming Liu

et al.

Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 461, P. 141873 - 141873

Published: Feb. 18, 2023

Language: Английский

Citations

42
Passive antifouling and active self-disinfecting antiviral surfaces DOI Creative Commons
Ostap Lishchynskyi, Yana Shymborska, Yurij Stetsyshyn

et al.

Chemical Engineering Journal, Journal Year: 2022, Volume and Issue: 446, P. 137048 - 137048

Published: May 18, 2022

Viruses pose a serious threat to human health and society in general, as virus infections are one of the main causes morbidity mortality. Till May 2022, over 513 million people around world have been confirmed be infected more than 6.2 died due SARS-CoV-2. Although COVID-19 pandemic will defeated near future, we likely face new viral threats coming years. One important instruments protect from viruses antiviral surfaces, which essentially capable limiting their spread. The formulation concept surfaces is relatively new. In five types mechanism directed against spread can proposed for surfaces; involving: direct indirect actions, receptor inactivation, photothermal effect, antifouling behavior. All classified into two - passive active. Passive based on superhydrophobic coatings that able repel contaminated droplets. turn, become biologically inert (e.g., blocked or destroyed) upon contact with active they contain agents: metal atoms, synthetic natural polymers, small molecules. functionality significantly improved additional properties, such temperature- pH-responsivity, multifunctionality, non-specific action different types, long-term application, high efficiency self-cleaning.

Language: Английский

Citations

59
Nanoscale copper and silver thin film systems display differences in antiviral and antibacterial properties DOI Creative Commons
Toni Luise Meister, Jill Fortmann,

Marina Breisch

et al.

Scientific Reports, Journal Year: 2022, Volume and Issue: 12(1)

Published: May 3, 2022

The current Coronavirus Disease 19 (COVID-19) pandemic has exemplified the need for simple and efficient prevention strategies that can be rapidly implemented to mitigate infection risks. Various surfaces have a long history of antimicrobial properties are well described bacterial infections. However, their effect on many viruses not been studied in depth. In context COVID-19, several surfaces, including copper (Cu) silver (Ag) coatings as antiviral measures easily slow viral transmission. this study, we detected against Severe Acute Respiratory Syndrome Coronavirus-2 (SARS-CoV-2) which were coated with Cu by magnetron sputtering thin films or Cu/Ag ultrathin bimetallic nanopatches. no Ag titers was observed, clear contrast its well-known antibacterial properties. Further enhancement ion release kinetics based an electrochemical sacrificial anode mechanism did increase activity. These results clearly demonstrate film systems display significant differences considered upon implementation.

Language: Английский

Citations

40
Role of cuproptosis in understanding diseases DOI Open Access

Shihan Cao,

Qian Wang,

Zhenzhen Sun

et al.

Human Cell, Journal Year: 2023, Volume and Issue: 36(4), P. 1244 - 1252

Published: May 8, 2023

Language: Английский

Citations

26
Synthesis of Chitosan-Silver Nanocomposite and Its Evaluation as an Antibacterial Coating for Mobile Phone Glass Protectors DOI Creative Commons

Gibson Jake C. Canama,

Monica Claire L. Delco,

Rhoel A. Talandron

et al.

ACS Omega, Journal Year: 2023, Volume and Issue: 8(20), P. 17699 - 17711

Published: May 10, 2023

An easy and environment-friendly route for antibacterial coating suited mobile phone glass protectors was successfully demonstrated. In this route, freshly prepared chitosan solution in 1% v/v acetic acid added with 0.1 M silver nitrate sodium hydroxide incubated agitation at 70 °C to form chitosan-silver nanoparticles (ChAgNPs). Varied concentrations of (i.e., 0.1, 0.2, 0.4, 0.6, 0.8% w/v) were used investigate its particle size, size distribution, later on, activity. Transmission electron microscope (TEM) imaging revealed that the smallest average diameter (AgNPs) 13.04 nm from w/v solution. Further characterizations optimal nanocomposite formulation using UV-vis spectroscopy Fourier transfer infrared also performed. Using a dynamic light scattering zetasizer, ζ-potential ChAgNP +56.07 mV, showing high aggregative stability an 182.37 nm. The nanocoating on shows activity against Escherichia coli (E. coli) 24 48 h contact. However, decreased 49.80% (24 h) 32.60% (48 h).

Language: Английский

Citations

26
The use of nanotechnology in the fight against viruses: A critical review DOI
Elaheh K. Goharshadi,

Kimiya Goharshadi,

Marjan Moghayedi

et al.

Coordination Chemistry Reviews, Journal Year: 2022, Volume and Issue: 464, P. 214559 - 214559

Published: April 13, 2022

Language: Английский

Citations

35
Virucidal N95 Respirator Face Masks via Ultrathin Surface-Grafted Quaternary Ammonium Polymer Coatings DOI Creative Commons
Mirco Sorci, Tanner D. Fink, Vaishali Sharma

et al.

ACS Applied Materials & Interfaces, Journal Year: 2022, Volume and Issue: 14(22), P. 25135 - 25146

Published: May 25, 2022

N95 respirator face masks serve as effective physical barriers against airborne virus transmission, especially in a hospital setting. However, conventional filtration materials, such nonwoven polypropylene fibers, have no inherent virucidal activity, and thus, the risk of surface contamination increases with wear time. The ability to protect infection can be likely improved by incorporating components that deactivate viruses on contact. We present facile method for covalently attaching antiviral quaternary ammonium polymers fiber surfaces fabrics are commonly used materials respirators via ultraviolet (UV)-initiated grafting biocidal agents. Here, C12-quaternized benzophenone is simultaneously polymerized grafted onto melt-blown or spunbond fabric using 254 nm UV light. This generated ultrathin polymer coatings which imparted permanent cationic charge without grossly changing morphology air resistance across filter. For polypropylene, comprises active layer masks, efficiency was negatively impacted from 72.5 51.3% uncoated coated single-ply samples, respectively. Similarly, directly applying full decreased 90.4 79.8%. effect due exposure organic solvents coating process. N95-level could achieved wearing over an mask fabricating exterior layer. Coated demonstrated broad-spectrum antimicrobial activity several lipid-enveloped viruses, well Staphylococcus aureus Escherichia coli bacteria. example, 4.3-log reduction infectious MHV-A59 3.3-log SuHV-1 after contact filters were observed, although level viral deactivation varied significantly depending strain protocol assaying infectivity.

Language: Английский

Citations

33
Comparative analysis of binder systems in copper feedstocks for metal extrusion additive manufacturing and metal injection moulding DOI Creative Commons
Mahrukh Sadaf, Santiago Cano, Mario Bragaglia

et al.

Journal of Materials Research and Technology, Journal Year: 2024, Volume and Issue: 29, P. 4433 - 4444

Published: Feb. 21, 2024

In the realm of material innovation, remarkable versatility thermoplastic-based highly filled composites emerges as a pivotal advantage for fabricating metal parts, seamlessly integrating design flexibility. This study delves into fusion and manufacturing, spotlighting convergence extrusion additive manufacturing (MEX) injection moulding (MIM) processes through adept utilization three distinct in-house developed copper-feedstocks. Each feedstock had different composition that influenced their processability; two feedstocks were solvent thermal debinding, one was only debinding. The sintering carried out under same conditions all produced specimens to assess effect binder on properties sintered components. Structural integrity evaluations encompassed 3-point bending, hardness tests, metallography. It possible perform MEX with filaments MIM pellets obtain acceptable-quality specimens. Regardless shaping method, shaped binders containing soluble survived steps. from intended solely debinding experienced nearly complete loss shape during process. For could be debound without defects, relative density between ∼88 94 % measured components ∼93 95 after sintering. All showed diffraction peaks pure copper powder, confirming reductive hydrogen atmosphere provided protection contamination reduced oxides have appeared in air. Moreover, adequate shrinkage ∼10–18 observed Vickers microhardness ∼32 HV ∼36 HV, respectively. Compared MEX, MIM-produced higher maximum stress (i.e., σmax = 79 ± 3.2 MPa). These results demonstrate plays crucial role determining success processes. Having possibility choose allows greater flexibility parts.

Language: Английский

Citations

7
Antiviral Activities of High Energy E-Beam Induced Copper Nanoparticles against H1N1 Influenza Virus DOI Creative Commons

Tae-Sung Ha,

Thi Tuyet Mai Pham,

Mi Kyung Kim

et al.

Nanomaterials, Journal Year: 2022, Volume and Issue: 12(2), P. 268 - 268

Published: Jan. 14, 2022

The pandemic outbreak of COVID-19 in the year 2020 that drastically changed everyone's life has raised urgent and intense need for development more efficacious antiviral material. This study was designed to develop copper nanoparticles (Cu NPs) as an agent validate activities developed NP. Cu NPs were synthesized using a high energy electron beam, characteristic morphologies evaluated. We found are spherical shape uniformly distributed, with diameter around 100 nm, opposed irregular commercially available microparticles MPs). An X-ray diffraction analysis showed presence no oxide II I NPs. A virus inactivation assay revealed visible viral DNA after 10- 30-min treatment H1N1 infectivity NPs-treated significantly decreased compared MPs-treated virus. viability A549 bronchial Madin-Darby Canine Kidney (MDCK) cells infected higher than those also exhibited markedly nucleoprotein (NuP), influenza virus-specific structural protein, Taken together, our shows effective MPs offer promising opportunities prevention devastatingly infectious diseases.

Language: Английский

Citations

23