The synergetic antibacterial activity of Ag islands on ZnO (Ag/ZnO) heterostructure nanoparticles and its mode of action

Zhang, Yi; Gao, Xingjie; Zhi, Lei; Liu, Xin; Jiang, Wei; Sun, Yihong; Yang, Jie

doi:10.1016/j.jinorgbio.2013.10.004

Cited by 67 publications

(27 citation statements)

References 47 publications

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“…In order to assess the antibacterial effect, different mass ratios of ZnO/Ag in the nanofibres were performed to inhibit Staphylococcus aureus and Escherichia coli, which were used as the test organism. The results revealed that different antibacterial activities against both bacteria were obtained after treatment of ZnO-or/and Ag-loaded nanofibres ( Figure 8 The results of bactericidal kinetic study showed in Figure 8 As reported, AgNPs can induce bacteria death by destroying cell wall or membrane, disturbing protein synthesis and processing, preventing DNA replication and disturbing the antioxidative system [11,12]. Ag þ ions released from AgNPs can attach directly onto cell surfaces and change the membrane permeability, resulting in induction and accumulation of intracellular ROS.…”

Section: Antibacterial Activitymentioning

confidence: 81%

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Zinc oxide/silver bimetallic nanoencapsulated in PVP/PCL nanofibres for improved antibacterial activity

et al. 2017

Artificial Cells, Nanomedicine, and Biotechnology

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The anti-infection ability and skin regeneration are important aspects on the progress of wound healing, which needs an ideal wound dressing that not only resists bacteria but also promotes skin regeneration. In this study, zinc oxide/silver/polyvinylpyrrolidone/polycaprolactone (ZnO/Ag/PVP/PCL) nanofibres were prepared through electrospinning. Firstly, zinc oxide nanoparticles (ZnONPs) and silver nanoparticle (AgNPs) were synthesized respectively. Secondly, the two nanoparticles were mixed with polyvinylpyrrolidone (PVP) and polycaprolactone (PCL) to obtain the nanofibres. The results of scanning electron microscopy (SEM) showed that ZnONPs and AgNPs were 40.07 ± 9.70 nm and 37.46 ± 12.02 nm, respectively. After electrospinning, the nanofibres were 368.22 ± 123.96 nm in diameter. Infrared spectroscopy revealed that ZnONPs/AgNPs bimetallic nanomaterials were physically embedded in the nanofibres. The antibacterial effects against Staphylococcus aureus and Escherichia coli of ZnO/Ag/PVP/PCL nanofibres were significantly better than these of the single metal material-loaded nanofibres. More importantly, the combination of ZnO and Ag reduced the cytotoxicity of ZnO/Ag/PVP/PCL bimetallic nanofibres toward fibroblasts. These findings demonstrated that ZnO/Ag/PVP/PCL bimetallic nanofibres should be of greater interest than the single metal nanomaterial-loaded nanofibres in inhibiting growth of bacteria.

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Section: Antibacterial Activitymentioning

confidence: 81%

“…Silver nanoparticles (AgNPs), another metal materials investigated for a long time, are an alternative antibacterial agent to inhibit/kill bacteria and show a significantly better antibacterial capacity than many antibiotics [10][11][12][13]. Similar to ZnO, high amount of Ag used would result in resistance and serious side effects.…”

Section: Introductionmentioning

confidence: 99%

Zinc oxide/silver bimetallic nanoencapsulated in PVP/PCL nanofibres for improved antibacterial activity

et al. 2017

Artificial Cells, Nanomedicine, and Biotechnology

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“…7. The ZnO present on the surface could be advantages via catalyzing ZnO mediated site specific DNA damage [57], more efficiently generating reactive oxygen species (ROS) and inherently higher bioactivity efficiency than NiO [58] and finally (4) NPs size, usually, a high specific surface area has a beneficial effect on the activity for catalysts. Therefore, the crystallite size may play a critical role in the biocide activity of ZnO NPs.…”

Section: Under Uv Lightmentioning

confidence: 99%

Antibacterial activities of sol–gel derived ZnO-multilayered thin films: p-NiO heterojunction layer effect

Talebian

Doudi

Mogoei

2015

J Sol-Gel Sci Technol

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Sol-gel dip coating method has been employed for the deposition of nanostructured single nickel oxide (NiO) and zinc oxide (ZnO) films and multilayered NiO/ ZnO/NiO and ZnO/NiO/ZnO films. The structural, morphology and optical properties of prepared films were studied using X-ray diffraction (XRD), scanning electron microscopy (SEM) and UV-vis spectroscopy, respectively. XRD analysis showed that ZnO-based films crystallized in write phase and presented an epitaxial orientation depending on the substrate. SEM images also showed uniform size distribution around 30-70 nm for all samples. Antibacterial effectiveness of NiO and ZnO-based films were tested against general Escherichia coli (E. coli ATCC 25922) and Streptococcus aureus (S. aureus, ATCC 29213) as Gram negative and Gram positive model, respectively, using the so-called drop-test method under UV light illumination and dark conditions. ZnO/NiO/ZnO film was found to be the most toxic among tested samples, followed by ZnO, NiO/ZnO/NiO and NiO films. Samples exposure to UV light resulted in higher activity compared to dark conditions against both E. coli and S. aureus, but considerably more effective in the former case. The obtained results were discussed according to the lattice matching between the heteroepitaxial films and structural modification as key roles on the preferential growth orientation and antibacterial activity. Graphical Abstract C-axis oriented ZnO/NiO/ZnO ZnO NiO ZnO

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“…14 However, silver nanoparticles with diameters <200 nm have high surface energy, consequently they tend to aggregate spontaneously to reduce this energy, making them unstable for long-term applications in air, water or sunlight. 15 To solve this problem, a wide range of materials, such as ZnO, 16,17 TiO 2 ,18,19 and SiO 2 20,21 have been employed as a support for Ag nanoparticles, so that the ultra fine Ag nanoparticles can be homogeneously formed without aggregation. 22 Among the numerous semiconductors, the use of In(OH) 3 is not reported in literature.…”

Section: Introductionmentioning

confidence: 99%

Photoluminescent and antimicrobial properties of silver‐doped indium hydroxide synthesized by one‐step microwave‐assisted hydrothermal method

Neto

Tavares

Ferreira

et al. 2018

Int J Applied Ceramic Tech

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Silver-doped indium hydroxide In (1-x) (OH) 3 : x Ag (with x = 0, 1, 2, 4, and 8 mol %) of Ag nanoparticles were synthesized by the microwave-assisted hydrothermal (MAH) method at 140°C for 30 minutes. These nanoparticles were characterized by X-ray diffraction (XRD), fourier transformed infrared (FT-IR) spectroscopy, and optical diffuse reflectance. Photoluminescence (PL) spectra were acquired with a 350 nm beam of a krypton ion laser as an excitation source. The antibacterial activities of the samples were evaluated against gram negative Escherichia coli bacteria and gram positive Staphylococcus aureus bacteria using the disc diffusion method. The results showed that all diffraction peaks present in XRD patterns could be indexed to the cubic lattice related to the In(OH) 3 phase.Broadband photoluminescence behavior in visible range spectra was observed for all samples with a maximum peak centered in the blue and green regions. The antibacterial activities showed that In (1-x) (OH) 3 : x Ag nanoparticles have a promising bactericide that can be used for deactivating microbes. K E Y W O R D Sbactericide activity, doping, indium hydroxide, microwave, silver

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The synergetic antibacterial activity of Ag islands on ZnO (Ag/ZnO) heterostructure nanoparticles and its mode of action

Cited by 67 publications

References 47 publications

Zinc oxide/silver bimetallic nanoencapsulated in PVP/PCL nanofibres for improved antibacterial activity

Zinc oxide/silver bimetallic nanoencapsulated in PVP/PCL nanofibres for improved antibacterial activity

Antibacterial activities of sol–gel derived ZnO-multilayered thin films: p-NiO heterojunction layer effect

Photoluminescent and antimicrobial properties of silver‐doped indium hydroxide synthesized by one‐step microwave‐assisted hydrothermal method

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