Ag NP catalysis of Cu ions in the preparation of AgCu NPs and the mechanism of their enhanced antibacterial efficacy

Zhou, Fang; Zhu, Yan; Yang, Longlai; Yang, De‐Quan; Sacher, E.

doi:10.1016/j.colsurfa.2021.127831

Cited by 24 publications

(30 citation statements)

References 63 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It can be seen from Figure 3 and Table 1 that the Ag NPs obtained after the reduction of silver nitrate in the SF1 fiber membrane are small in size and concentrated in 4-16 nm, which accounts for 97%, and is uniformly dispersed in the fiber. Small-sized monodispersed Ag NPs attribute to the superior antibacterial properties of SF1 (Marambio-Jones and Hoek, 2010; Zhou et al, 2022). As shown in Figure 7, the number of surviving colonies in the Cur@ Ag core/shell fiber membrane (CS) was 16, and its bacteriostatic rate was as high as 93.04%.…”

Section: Staphylococcus Aureusmentioning

confidence: 99%

Fabrication of Curcumin@Ag Loaded Core/Shell Nanofiber Membrane and its Synergistic Antibacterial Properties

Wang

Liu

et al. 2022

Front. Chem.

View full text Add to dashboard Cite

The core/shell structure nanofiber membrane loaded with curcumin and silver nanoparticles was prepared by coaxial electrospinning technology, which is a high-efficiency combined antibacterial material composed of photodynamic antibacterial agent and metal nanoparticle. As a photosensitizer, curcumin could generate singlet oxygen under laser irradiation. Silver nanoparticles have antibacterial properties, and could also enhance the singlet oxygen production of curcumin due to the metal-enhanced singlet oxygen effect, thereby producing a synergistic antibacterial effect. Compared with the antibacterial rate of uniaxial curcumin fiber membrane (45.65%) and uniaxial silver nanoparticle-loaded fiber membrane (66.96%), the antibacterial rate of curcumin@Ag core/shell structure fiber membrane against Staphylococcus aureus is as high as 93.04%. In addition, the antibacterial experiments show that the core/shell fiber membrane also has excellent antibacterial effects on Escherichia coli.

show abstract

Section: Staphylococcus Aureusmentioning

confidence: 99%

Fabrication of Curcumin@Ag Loaded Core/Shell Nanofiber Membrane and its Synergistic Antibacterial Properties

Wang

Liu

et al. 2022

Front. Chem.

View full text Add to dashboard Cite

show abstract

“…9 Moreover, the catechol, amino and quinonyl groups on PDA layer supply reactive sites and create a platform for further surface modification with antibacterial and anti-fouling molecules or materials. Among the current commercial antibacterial materials in market, the antibiotics 10 or other antibacterial substances such as Ag nanoparticles, 11 antimicrobial peptides, 12 guanidine salt polymer, 13 quaternary ammonium salt 14 have drawbacks of drug resistance, money-consumption and potential toxicity, 15 poor stability. 16 As a cationic bactericide, polyhexamethylene guanidine (PHMG) stands out among many candidates for its low toxicity, ecofriendly, 17 and sufficient bactericidal efficiency both for gram-positive/negative bacteria under low concentration conditions.…”

Section: Introductionmentioning

confidence: 99%

Construction of antifouling and antibacterial polyhexamethylguanidine/chondroitin sulfate coating on polyurethane surface based on polydopamine rapid deposition

Zhu

Yuan

Zhang

et al. 2022

J of Applied Polymer Sci

View full text Add to dashboard Cite

Implanted medical devices are widely used in clinic for disease treatment, but they generally suffer from the bio‐fouling problem which leads to the reduction of service life and loss of therapeutic effects. Herein, an eco‐friendly method based on polydopamine (PDA) fast deposition is developed to construct anti‐fouling and antibacterial surface on polyurethane (PU). The self‐adhesive layer of PDA contributes to the formation of a platform with active sites for further antibacterial and hydrophilic modification. Polyhexamethylguanidine (PHMG) as antibacterial ingredient and chondroitin sulfate (CS) as hydrophilic component covalently bind on PDA platform, which successively helps to form PU‐PDA/PHMG/CS. The resultant surface demonstrates the excellent property of anti‐protein adsorption (96.8%), anti‐bacterial ability (99.9%), and cell compatibility (95.0%), which would have great potential for medical application.

show abstract

“…Ag-based nanoalloys (NAs), especially AgCu, have been of great interest in recent decades due to their enhanced antibacterial efficacies and the reduced amount of silver they use [ 1 , 2 , 3 ]. The enhanced antibacterial efficacy of AgCu NAs is greater than that of Ag NPs, Cu NPs, and their mixture [ 4 ], although the exact mechanism is still unknown [ 5 , 6 ]. AgCu NAs also exhibit less toxicity to human cells.…”

Section: Introductionmentioning

confidence: 99%

“…Recent studies [ 5 , 30 ] found that AgCu NAs can be synthesized by the Ag NP catalysis of Cu 2+ at 85 °C, which showed a greatly enhanced antibacterial efficacy. It is believed that the enhanced antibacterial mechanism partly involves Ag + released during AgCu NA formation.…”

Section: Introductionmentioning

confidence: 99%

“…Despite both TEM and UV-Vis spectra having been extensively used to characterize Ag and AgCu NPs [ 1 , 2 , 3 , 4 , 5 , 31 ], including NPs size and distribution, crystallinity and composition, and aggregation by TEM and its color change by UV-Vis spectra, there is little research on the reaction kinetic process of Ag or AgCu NPs by UV-Vis so far. Using SPR (surface plasma resonance) of Ag NPs’ surface physiochemical data at room temperature may produce useful information if there is a reaction between AgNPs and the Cu ion system.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

AgCu NP Formation by the Ag NP Catalysis of Cu Ions at Room Temperature and Their Antibacterial Efficacy: A Kinetic Study

Tao

Zhou²,

Wang³

et al. 2022

Molecules

View full text Add to dashboard Cite

Although a facile route to prepare AgCu nanoalloys (NAs) with enhanced antibacterial efficacy using Ag NP catalysis of Cu ions at elevated temperatures was previously developed, its detailed reaction process is still unclear due to the fast reaction process at higher temperatures. This work found that AgCu NAs can also be synthesized by the same process but at room temperature. AgCu NAs formation kinetics have been studied using UV–Visible spectra and Transmission Electron Microscopy (TEM), where formation includes Cu2+ deposition onto the Ag NP surface and Ag+ release, reduction, and agglomeration to form new Ag NPs; this is followed by a redistribution of the NA components and coalescence to form larger AgCu NPs. It is found that SPR absorption is linear with time early in the reaction, as expected for both pseudo-first-order (PFO) and pseudo-second-order (PSO) kinetics; neither model is followed subsequently due to contributions from newly formed Ag NPs and AgCu NAs. The antibacterial efficacy of the AgCu NAs thus formed was estimated, with a continuous increase over the whole alloying process, demonstrating the correlation of antibacterial efficacy with the extent of AgCu NA formation and Ag+ release.

show abstract

Ag NP catalysis of Cu ions in the preparation of AgCu NPs and the mechanism of their enhanced antibacterial efficacy

Cited by 24 publications

References 63 publications

Fabrication of Curcumin@Ag Loaded Core/Shell Nanofiber Membrane and its Synergistic Antibacterial Properties

Fabrication of Curcumin@Ag Loaded Core/Shell Nanofiber Membrane and its Synergistic Antibacterial Properties

Construction of antifouling and antibacterial polyhexamethylguanidine/chondroitin sulfate coating on polyurethane surface based on polydopamine rapid deposition

AgCu NP Formation by the Ag NP Catalysis of Cu Ions at Room Temperature and Their Antibacterial Efficacy: A Kinetic Study

Contact Info

Product

Resources

About