Influence of processing conditions on the mechanical, tribological and fatigue performance of cold spray coating: a review

Surface Engineering, Journal Year: 2022, Volume and Issue: 38(4), P. 324 - 365

Published: April 3, 2022

Cold spray is an emerging surface coating technology for rapidly developing thick coating, thin films and additive manufacturing of parts at relatively low temperatures. The cost scalability a cold method make it promising diverse industrial applications. Presently, the widely used production machine parts, materials tools that requires desired properties. However, consideration process parameters setting develops reliable having high mechanical, tribological, fatigue morphological properties demanding Hence, aim this paper to study effect processing conditions (pressure temperature propellant gas, powder particle morphology post-process treatments) on tribological mechanical cold-sprayed coatings. Further, microstructure static characteristics material also discussed.

Language: Английский

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Environmental Persistence of Monkeypox Virus on Surfaces in Household of Person with Travel-Associated Infection, Dallas, Texas, USA, 2021

Emerging infectious diseases, Journal Year: 2022, Volume and Issue: 28(10), P. 1982 - 1989

Published: Aug. 20, 2022

In July 2021, we conducted environmental sampling at the residence of a person in Dallas, Texas, USA, who had travel-associated human West African monkeypox virus (MPXV-WA). Targeted swab was 15 days after left household. Results indicate extensive MPXV-WA DNA contamination, and viable from 7 samples successfully isolated cell culture. There no statistical difference (p = 0.94) between PCR positivity porous (9/10, 90%) vs. nonporous (19/21, 90.5%) surfaces, but there significant (p<0.01) detected cultures (6/10, 60%) (1/21, 5%) surfaces. These findings that surfaces (e.g., bedding, clothing) may pose more MPXV exposure risk than metal, plastic). Viable on household least days. However, low titers (<10

Language: Английский

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Green synthesis of nanoparticles for remediation organic pollutants in wastewater by adsorption

Advances in chemical pollution, environmental management and protection, Journal Year: 2023, Volume and Issue: unknown, P. 305 - 345

Published: July 27, 2023

Language: Английский

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Silver Nanoparticles as Antimicrobial Agents in Veterinary Medicine: Current Applications and Future Perspectives

Nanomaterials, Journal Year: 2025, Volume and Issue: 15(3), P. 202 - 202

Published: Jan. 27, 2025

Silver nanoparticles (AgNPs) have gained significant attention in veterinary medicine due to their antimicrobial properties and potential therapeutic applications. has long been recognized for its ability combat a wide range of pathogens, when engineered at the nanoscale, silver’s surface area reactivity are greatly enhanced, making it highly effective against bacteria, viruses, fungi. This narrative review aimed summarize evidence on AgNPs current clinical applications medicine. The action involves several mechanisms, including, among others, release silver ions, disruption cell membranes envelopes, induction oxidative stress, inhibition pathogens’ replication, DNA damage. Their size, shape, charge, concentration influence efficacy As result, use explored animals infection prevention treatment some areas, such as wound care, coating surgical implants, animal reproduction, airway infections. They also shown promise preventing biofilm formation, major challenge treating chronic bacterial Additionally, studied feed supplement enhance health growth. Research suggested that could stimulate immune responses improve gut microbiota livestock, potentially reducing need antibiotics husbandry. Despite promising applications, further research is necessary fully understand safety, efficacy, long-term effects animals, humans, environment.

Language: Английский

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Polymer metallization via cold spray additive manufacturing: A review of process control, coating qualities, and prospective applications

Additive manufacturing, Journal Year: 2021, Volume and Issue: 48, P. 102459 - 102459

Published: Nov. 6, 2021

Polymer metallization via cold spray additive manufacturing is an emerging thermal approach for deposition of thick metallic coatings on polymers and fiber-reinforced composites that promises high productivity, ecofriendliness, scalability the coating process. In polymer spray, solid powder accelerated by a supersonic stream preheated gas propelled toward substrate, where it built layer-by-layer impact-induced heating particle deformation. Since pioneering study at Cambridge in 2006, nearly 50 experimental reports have been published, half which appeared within past three years. This review distinguishes from other methods, analyzes peculiarities spraying composites, outlines historical establishment field, summarizes available literature spray. The major focus here influence process parameters efficiency, adhesion strength, electrical conductivity properties formed composites. promising applications lightning strike protection, electroplating, osseointegration, antifouling, antivirus, e.g. anti-Covid-19 surfaces, surface functionalizations reviewed. Finally, recommendations were given how to enhance data reuse future studies

Language: Английский

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Passive antifouling and active self-disinfecting antiviral surfaces

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

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Plasmon-Enhanced Peroxidase-like Activity of Nitrogen-Doped Graphdiyne Oxide Quantum Dots/Gold–Silver Nanocage Heterostructures for Antimicrobial Applications

Chemistry of Materials, Journal Year: 2022, Volume and Issue: 34(3), P. 1356 - 1368

Published: Jan. 19, 2022

Plasmon stimulation is an intriguing method to modulate the enzyme-mimic functions of nanomaterials, while utilization plasmon excitation remains low efficiency. Herein, by loading nitrogen-doped graphdiyne quantum dots (N-GDQDs) onto gold–silver nanocages (AuAg NCs), hollow cube-shaped N-GDQDs/AuAg NC heterostructures with strong local surface resonance (LSPR) response in near-infrared (NIR) region are reported. This nanozyme can concurrently harvest LSPR-induced hot carriers and produce photothermal effects, resulting a significantly enhanced peroxidase-like activity upon 808 nm irradiation. Both experimental data theoretical calculations reveal that remarkable catalytic performance NCs results from narrow band gap semiconductor characteristics N-GDQDs, LSPR effect AuAg NCs, fast interfacial electron transfer dynamics. Moreover, this demonstrated achieve >99.999% antibacterial efficiency against methicillin-resistant Staphylococcus aureus (MRSA), S. aureus, Escherichia coli 10 min vitro vivo. study not only sheds light on mechanism nanozyme/photocatalysis coupling process but also provides new avenue for rationally designing plasmonic metal/semiconductor-involved nanozymes synergistic photoenhanced therapy.

Language: Английский

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Nanoscale copper and silver thin film systems display differences in antiviral and antibacterial properties

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

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Recent Advancements in Plant- and Microbe-Mediated Synthesis of Metal and Metal Oxide Nanomaterials and Their Emerging Antimicrobial Applications

ACS Applied Nano Materials, Journal Year: 2023, Volume and Issue: 6(10), P. 8106 - 8134

Published: May 4, 2023

Antibiotic resistance against infections caused by microbes has emerged as a global challenge resulting in longer hospitalizations and higher medical cost mortality. The excessive use of antibiotics led to the swift progression antibiotic bacterial strains. Metallic metal oxide (M/MO) nanoparticles (NPs) have potential provide pertinent alternative they interact with critical cellular organelles biomolecules such DNA, enzymes, ribosomes, lysosomes. This affects permeability cell membrane causing oxidative stress, gene expression, protein activation, enzyme activation restricting habitat microbes. Further, NPs simultaneously target multiple at once making them an efficient antibacterial agent which are unable develop easily, although toxicity associated M/MO still remains key for clinical uses. Green synthesis provides solution reduce toxic effects these it does not harsh chemicals environment NPs. In this work, we provided comprehensive review green using plants (roots, seeds, barks, flowers) (bacteria, fungi, algae). yield achieved from is lower than that conventional methods significant advancements been made recently delineated different mechanism NP interaction their antimicrobial applications discussed detailed. present aims overview current state large-scale well activities.

Language: Английский

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Quaternized Chitosan Derivatives as Viable Antiviral Agents: Structure–Activity Correlations and Mechanisms of Action

ACS Applied Materials & Interfaces, Journal Year: 2023, Volume and Issue: 15(15), P. 18707 - 18719

Published: April 4, 2023

Cationic polysaccharides have demonstrated significant antimicrobial properties and great potential in medical applications, where the antiviral activity is of interest. As today, alcohols oxidizing agents are commonly used as disinfectants. However, these compounds not environmentally safe, short periods, may cause health issues. Therefore, this study aimed to develop metal-free friendly quaternary chitosans (QCs) with excellent long-lasting virucidal activity. To evaluate this, both single double QCs were obtained using AETMAC ([2-(acryloyloxy)ethyl]-trimethylammonium chloride) GTMAC (glycidyl trimethylammonium precursors. Further, investigated influence functional group, charge density, molecular weight (Mw) on QCs. It proposed that higher along length alkyl linkers, hydrophobic interactions affected The findings heterogeneously functionalized chitosan exhibited against enveloped virus φ6 nonenveloped viruses φX174 MS2. These quaternized derivatives promising viable agents, hand/surface sanitizers, or other biomedical applications.

Language: Английский

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