Fabrication of Cu2O-Ag nanocomposites with enhanced durability and bactericidal activity

Yang, Zhaoqing; Ma, Chengcheng; Wang, Wei; Zhang, Mutian; Hao, Xiangping; Chen, Shougang

doi:10.1016/j.jcis.2019.09.015

Cited by 84 publications

(41 citation statements)

References 56 publications

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“…One study deduced that the microstructure was actually phase-separated instead of an alloy, because of the existence of distinct diffraction peaks of both Ag and Cu in mixed Ag-Cu NPs (Figure 19) [246]. A second study, on Cu 2 O-Ag nanocomposites, reached a similar conclusion [271]. If Ag and Cu formed a homogeneously distributed nanoalloy microstructure, the diffraction peaks of Cu and Cu oxides would not appear in the XRD (Figure 20a,b) [272].…”

Section: Tem and Edxsmentioning

confidence: 86%

“…According to this study, charge transfer exists only at the interface of phase-separated Ag and Cu, thereby causing a weak release of Ag ions, whereas Ag atoms, surrounded by Cu atoms, can be oxidized, releasing more ions. In contrast, it was suggested that the higher antimicrobial properties of AgCu nanoalloys were due to the much larger (28×) amount of Cu ions released from nanoalloys than from single Cu NPs [271,281].…”

Section: Antimicrobial Potential Of Mixed Ag-cu Nps and Agcu Nanoalloysmentioning

confidence: 99%

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Antimicrobial Properties of the Ag, Cu Nanoparticle System

Fan

Yahia

Sacher

2021

Biology

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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.

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Section: Tem and Edxsmentioning

confidence: 86%

Section: Antimicrobial Potential Of Mixed Ag-cu Nps and Agcu Nanoalloysmentioning

confidence: 99%

Antimicrobial Properties of the Ag, Cu Nanoparticle System

Fan

Yahia

Sacher

2021

Biology

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“…Silver NPs have a good killing effect on Gram-positive cocci represented by Staphylococcus aureus and Gram-negative bacilli represented by Escherichia coli ( Deshmukh et al, 2018 ; Subramaniyan et al, 2019 ). Currently, the biggest challenge is to enable the stable release of silver at a suitable concentration on the surface of metal implants ( Yang Z. et al, 2019 ; Zhu Y. et al, 2019 ; Lai et al, 2020 ). The nanotube structure, which is prepared on the surface of the titanium substrate and loaded with silver or Ag 2 O NPs, is one of the solutions.…”

Section: Nanomaterials Loadingmentioning

confidence: 99%

Nano-Modified Titanium Implant Materials: A Way Toward Improved Antibacterial Properties

Liu

Attarilar

et al. 2020

Front. Bioeng. Biotechnol.

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“…The reported antibacterial mechanism of each nanoparticle is different among them. But most of these mechanisms involve the destruction of bacterial membrane, creating an oxidative stress response, or the microorganism cell membrane damage through electrostatic interactions, which inhibit the synthesis of DNA or RNA, or reduce the enzymes production [ 16 – 18 ]. Graphene nanoparticles also have been recognized as antimicrobial agents because of its scissoring effect acting as s a sharp blade, which cause the bacteria membrane damage and irreversible electrolytes leakage from the bacteria cell [ 19 , 20 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of ionic liquid on graphene decorated with copper nanostructure dispersion towards silicon/graphene/copper composites with enhanced thermal, electrical and antimicrobial properties

Solorzano-Ojeda¹,

Sánchez-Valdés²,

Ramos-deValle³

et al. 2021

Iran Polym J

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Graphic abstract Graphene decorated with cooper nanostructures were prepared with and without ionic liquid (IL) using different milling times. The obtained samples were characterized by Raman, X-ray diffraction (XRD) and transmission electron microscopy (TEM), to analyze the effect of the grinding time on the copper particles adhesion to the graphene sheets. Composites of silicon with two contents of G/Cu, at two weight ratios, nanostructures were prepared and the crosslinking characteristics were analyzed by a rubber process analyzer. The thermal conductivity, electrical resistivity and antimicrobial characteristics against E. coli and S. aureus for these silicon/G/Cu composites were determined. It was found that the use of IL enhances the G/Cu nanostructures dispersion into the silicon polymer matrix with a noticeable improvement in thermal conductivity of 1.12 W/mK for a 7 wt% of G/Cu, a volume electrical resistivity of 4.1 × 10 10 Ω cm with 7 wt% of G/Cu nanoparticles and antimicrobial response of 4.21 ± 0.11 to E. coli and 5.33 ± 0.11 to S. aureus with 7% of G/Cu nanoparticles. It was determined that π–π interactions between graphene and aromatic molecule of IL may be influencing the observed improvement in G/Cu dispersion and final composite performance. The novelty of this work is the use of IL to improve the G/Cu NPs dispersion into the silicon polymer matrix. This silicon/G/Cu composite could be an option to prepare medical devices for electrotherapy or face protection against COVID-19 or other silicon-based devices for medical applications.

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Fabrication of Cu2O-Ag nanocomposites with enhanced durability and bactericidal activity

Cited by 84 publications

References 56 publications

Antimicrobial Properties of the Ag, Cu Nanoparticle System

Antimicrobial Properties of the Ag, Cu Nanoparticle System

Nano-Modified Titanium Implant Materials: A Way Toward Improved Antibacterial Properties

Effect of ionic liquid on graphene decorated with copper nanostructure dispersion towards silicon/graphene/copper composites with enhanced thermal, electrical and antimicrobial properties

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