The physicochemical characterization of the Cu nanoparticle surface, and of its evolution on atmospheric exposure: Application to antimicrobial bandages for wound dressings

Loran, S.; Cheng, Shaobo; Botton, Gianluigi A.; Yahia, L’H.; Yelon, A.; Sacher, E.

doi:10.1016/j.apsusc.2018.12.149

Cited by 16 publications

(21 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Generally, TOF-SIMS is combined with XPS to investigate the chemical components more accurately, with one supporting the results of the other [ 81 , 263 , 264 ]. In one report, N was detected by TOF-SIMS, but not by XPS, which means N-containing species, at very low concentrations, are confined on the surface of Ag NPs [ 86 ].…”

Section: Mixed Ag–cu Nps and Agcu Nanoalloysmentioning

confidence: 97%

“…Some research has demonstrated that NPs possess antimicrobial properties under dry conditions [ 81 , 82 ], indicating that direct contact appears to be a potential antimicrobial mechanism. In a dry environment, no electrochemical reactions occur on the surface of NPs, so ions and electrons are not released to interact with biomolecules, or induce ROS bursts.…”

Section: Antimicrobial Mechanismsmentioning

confidence: 99%

“…It is posited that Cu NPs interact with membrane proteins [ 83 ], and penetrate into bacterial cells [ 84 ], inducing an explosion of ROS in the intracellular environment ( Figure 6 ) [ 85 ]. Experiments have shown that the production of ions cannot increase the antibacterial effect of Cu NPs [ 81 ].…”

Section: Antimicrobial Mechanismsmentioning

confidence: 99%

See 2 more Smart Citations

Antimicrobial Properties of the Ag, Cu Nanoparticle System

Fan

Yahia

Sacher

2021

Biology

104

View full text Add to dashboard Cite

Microbes, including bacteria and fungi, easily form stable biofilms on many surfaces. Such biofilms have high resistance to antibiotics, and cause nosocomial and postoperative infections. The antimicrobial and antiviral behaviors of Ag and Cu nanoparticles (NPs) are well known, and possible mechanisms for their actions, such as released ions, reactive oxygen species (ROS), contact killing, the immunostimulatory effect, and others have been proposed. Ag and Cu NPs, and their derivative NPs, have different antimicrobial capacities and cytotoxicities. Factors, such as size, shape and surface treatment, influence their antimicrobial activities. The biomedical application of antimicrobial Ag and Cu NPs involves coating onto substrates, including textiles, polymers, ceramics, and metals. Because Ag and Cu are immiscible, synthetic AgCu nanoalloys have different microstructures, which impact their antimicrobial effects. When mixed, the combination of Ag and Cu NPs act synergistically, offering substantially enhanced antimicrobial behavior. However, when alloyed in Ag–Cu NPs, the antimicrobial behavior is even more enhanced. The reason for this enhancement is unclear. Here, we discuss these results and the possible behavior mechanisms that underlie them.

show abstract

Section: Mixed Ag–cu Nps and Agcu Nanoalloysmentioning

confidence: 97%

Section: Antimicrobial Mechanismsmentioning

confidence: 99%

See 1 more Smart Citation

Antimicrobial Properties of the Ag, Cu Nanoparticle System

Fan

Yahia

Sacher

2021

Biology

104

View full text Add to dashboard Cite

show abstract

“…Interactions between available OH groups (through ion-dipole interactions) and COOH groups (through ion interactions) with copper ions have been thoroughly studied over the years. In the last decade, copper ions and Cu-based nanoparticles (NPs) have been widely used for cellulose fibers' functionalization to develop fibers for various purposes, particularly for obtaining antimicrobial fibers (Emam et al 2014;Marković et al 2019Marković et al , 2020Loran et al 2019) and impart self-cleaning (Montazer et al 2015;Rezaie et al 2017;Yang et al 2017).…”

Section: Introductionmentioning

confidence: 99%

Electro-physical properties of jute fabrics in a condition of high humidity - Effect of fabric chemical composition and coating with Cu-based nanoparticles

Ivanovska

Maletić

Djokić

et al. 2021

Preprint

View full text Add to dashboard Cite

The electro-physical properties of raw and chemically modified jute fabrics were studied as complex phenomena of the interaction between the fabrics’ chemical composition, crystallinity, moisture sorption, COOH group content, structural characteristics, and frequency of the electric field. At 80% relative air humidity, all chemically modified jute fabrics have 38–179% and 1.7–5.4 times higher dielectric loss tangent and effective relative dielectric permeability compared to unmodified, respectively. To further improve these properties, fabrics were treated with CuSO4 and Cu-based nanoparticles were in situ synthesized on their surface by reduction. A few single Cu-based nanoparticles were observed across the alkali modified fabric’s surface, while single and agglomerated nanoparticles were distributed over the oxidatively modified fabric’s surface. No matter whether metallic Cu or copper oxide (Cu2O or CuO) nanostructures (or their mixtures) are synthesized (proven by XRD), excellent fabrics’ effective relative dielectric permeability is guaranteed. In other words, during the exploitation in specific conditions contributing to copper reduction, the jute fabrics will be able to store 21–163 times more energy from an external electric field than before the exploitation, which further extended their lifetime. On the other hand, with increasing the total content of Cu after the reduction and formation of single and agglomerated Cu-based nanoparticles, the movement of jute structural components’ molecules becomes difficult resulting in lower energy dissipation within the chemically modified than within unmodified fabric. Applied chemical modification and coating with Cu-based nanoparticles enables designing fabrics with predictable electro-physical properties, which is very important from the application point of view.

show abstract

“…For example, the good mechanical strength, high electro migration resistance, excellent thermal and electrical conductivities of Cu nanoparticles enabled their application in high‐power LED packages to enhance heat dissipation . Cu nanoparticles also have been demonstrated with good antibacterial property and thus were used in the medical field such as wound dressings . Very recently, application of Cu nanoparticles in photocatalysis has raised great attention.…”

Section: Introductionmentioning

confidence: 99%

Coupling Photothermal Effect into Efficient Photocatalytic H₂ Production by Using a Plate‐like Cu@Ni Core‐shell Cocatalyst

Guo

Xue

et al. 2020

ChemCatChem

View full text Add to dashboard Cite

The general moderate reaction condition in solar photocatalytic hydrogen production (i. e., near ambient pressure, room temperature) makes interfacial mass and energy transfer extremely slow, even by employing a cocatalytic material (usually in the form of noble metal nanoparticles or their counterparts). Herein, by fabricating well-defined Cu@Ni core-shell nanoplate cocatalyst and further incorporating it with a g-C 3 N 4 photocatalyst, we demonstrate that interfacial processes could be significantly improved by coupling localized photothermal effect into a cocatalyst. Specifically, Cu nanoplate can induce localized strong hot spots on Ni nanoparticles via a visible-light-driven surface plasma resonance effect. As a result, photogenerated electrons transferred from g-C 3 N 4 to Ni, could be elevated to a more energetic state, leading to a substantially improved photocatalytic activity toward H 2 evolution from water. The highest hydrogen generation rate reaches 55 μmol h À 1 g À 1 , 110 times of that pristine g-C 3 N 4 . This work indicates that photoelectric and photothermal effects can be effectively coupled by integrating metal hetero-nanoparticles.[a] X.

show abstract

The physicochemical characterization of the Cu nanoparticle surface, and of its evolution on atmospheric exposure: Application to antimicrobial bandages for wound dressings

Cited by 16 publications

References 31 publications

Antimicrobial Properties of the Ag, Cu Nanoparticle System

Antimicrobial Properties of the Ag, Cu Nanoparticle System

Electro-physical properties of jute fabrics in a condition of high humidity - Effect of fabric chemical composition and coating with Cu-based nanoparticles

Coupling Photothermal Effect into Efficient Photocatalytic H₂ Production by Using a Plate‐like Cu@Ni Core‐shell Cocatalyst

Contact Info

Product

Resources

About

The physicochemical characterization of the Cu nanoparticle surface, and of its evolution on atmospheric exposure: Application to antimicrobial bandages for wound dressings

Cited by 16 publications

References 31 publications

Antimicrobial Properties of the Ag, Cu Nanoparticle System

Antimicrobial Properties of the Ag, Cu Nanoparticle System

Electro-physical properties of jute fabrics in a condition of high humidity - Effect of fabric chemical composition and coating with Cu-based nanoparticles

Coupling Photothermal Effect into Efficient Photocatalytic H2 Production by Using a Plate‐like Cu@Ni Core‐shell Cocatalyst

Contact Info

Product

Resources

About

Coupling Photothermal Effect into Efficient Photocatalytic H₂ Production by Using a Plate‐like Cu@Ni Core‐shell Cocatalyst