Simple and environmentally friendly preparation and size control of silver nanoparticles using an inhomogeneous system with silver-containing glass powder

Mori, Yasutaka; Tagawa, Tetsuya; Fujita, Masanori; Kuno, Toyohiko; Suzuki, Satoshi; Matsui, Takemi

doi:10.1007/s11051-010-0168-z

Cited by 29 publications

(61 citation statements)

References 34 publications

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“…Chitosan is water soluble in acidic conditions due to protonation of primary amines in the chitosan chains. The Ag NP suspension was also acidic (pH 5.23 to 6.25) [25]. Although the acidity of these two solutions was maintained during mixing, partial precipitation of the Ag NP/Ch composites was observed at all conditions tested, suggesting that decreased solubility of the chitosan chains was induced by the binding of Ag NPs to the chitosan amino and hydroxyl groups [28].…”

Section: Resultsmentioning

confidence: 99%

“…Ag NP suspensions were synthesized from silver-containing glass powder (BSP21, silver content 1 wt%, average grain size 10 μm, Kankyo Science, Kyoto, Japan) and glucose aqueous solution, as described previously [25]. Ag NPs used in this work were spherical; their characteristics are summarized in Table 1.…”

Section: Methodsmentioning

confidence: 99%

“…Controlling the size of Ag NPs is as important to antiviral activity as the composition of the Ag NPs. We previously demonstrated an environmentally friendly process for producing Ag NPs with a narrow size distribution [25]. This process uses only three materials: a silver-containing glass powder as an Ag + supplier, glucose as a reducing agent for Ag + , and water as a solvent.…”

Section: Introductionmentioning

confidence: 99%

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Antiviral activity of silver nanoparticle/chitosan composites against H1N1 influenza A virus

et al. 2013

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Silver nanoparticle (Ag NP)/chitosan (Ch) composites with antiviral activity against H1N1 influenza A virus were prepared. The Ag NP/Ch composites were obtained as yellow or brown floc-like powders following reaction at room temperature in aqueous medium. Ag NPs (3.5, 6.5, and 12.9 nm average diameters) were embedded into the chitosan matrix without aggregation or size alternation. The antiviral activity of the Ag NP/Ch composites was evaluated by comparing the TCID50 ratio of viral suspensions treated with the composites to untreated suspensions. For all sizes of Ag NPs tested, antiviral activity against H1N1 influenza A virus increased as the concentration of Ag NPs increased; chitosan alone exhibited no antiviral activity. Size dependence of the Ag NPs on antiviral activity was also observed: antiviral activity was generally stronger with smaller Ag NPs in the composites. These results indicate that Ag NP/Ch composites interacting with viruses exhibit antiviral activity.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Antiviral activity of silver nanoparticle/chitosan composites against H1N1 influenza A virus

et al. 2013

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“…Multiple processes have been reported for controlling the physical and/or chemical characteristics of Ag NPs [3], and environmentally friendly processes have been devised using harmless materials to prepare Ag NPs, precluding the need for complicated purification procedures prior to use in biomedical and environmental applications [4]. We also reported the synthesis of Ag NPs (diameter < 10 nm) using only AgNO 3 -containing glass powder, glucose, and water [4,5,6]. Commercially available AgNO 3 -containing glass is usually used as an antimicrobial agent in environmental, osseous, or dental applications because it allows the sustained release of Ag + into aqueous environments.…”

Section: Introductionmentioning

confidence: 99%

Cytotoxicity of Silver Nanoparticle and Chitin-Nanofiber Sheet Composites Caused by Oxidative Stress

et al. 2016

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Size-controlled spherical silver nanoparticles (<10 nm) and chitin-nanofiber sheet composites (Ag NPs/CNFS) have previously been reported to have strong antimicrobial activity in vitro. Although Ag NPs/CNFS have strong antimicrobial activity, their cytotoxicity has not been investigated. This study was performed to evaluate the effects of Ag NPs/CNFS on cytotoxicity for fibroblasts in vitro and healing delay of wound repair in vivo, focused on oxidative stress. Cytotoxic activities of Ag NPs/CNFS were investigated using a fibroblast cell proliferation assay, nitric oxide/nitrogen dioxide (NO/NO2) measurement of the cell lysates in vitro, inhibitory effects of Ag NPs/CNFS on healing-impaired wound repair using diabetic mice in vivo, 8-hydroxy-2′-deoxyguanosine (8-OHdG) immunohistochemical staining of the skin sections, and generation of carbonyl protein in the wound was performed to evaluate cytotoxicity with oxidative stress. Ag NPs/CNFS exhibited cytotoxicity for fibroblasts and a significant increase of total NO/NO2 levels in the cell lysates in vitro and increased levels of 8-OHdG and carbonyl proteins in vivo. Although wound repair in the continuously Ag NPs/CNFS-treated group was delayed, it could be mitigated by washing the covered wound with saline. Thus, Ag NPs/CNFS may become accepted as an anti-infectious wound dressing.

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“…With applications in foods and drugs, fastness referring to the tendency of similar or identical particles or surfaces to cling to one another is very important. The forces of fastnesses can be named of chemical adhesion, dispersive adhesion and diffusive adhesion which are the intermolecular forces responsible for the function of various kinds of stickers and sticky tape into the categories [18,19]. Among the cumulative magnitudes of these intermolecular forces, chemical adhesions of electroless coatings on PE membranes in general are most acceptable when the silver films and its ions adhere to the PE surfaces by ionic, covalent, hydrogen bonds and the network of those bonds [6,15].…”

Section: Introductionmentioning

confidence: 99%

Comparisons of Fastness of the Coating Processes of Electroless Silver Plating on Polyethylene Membrane Surfaces

Yu¹,

Zhang²,

Geng³

et al. 2016

Proceedings of the 2015 International Conference on Materials Chemistry and Environmental Protection (Meep-15)

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(Table II) were not much different. The highest and lowest average fastness values of coating silver by different processes were the spray processes and the brush processes, respectively. Thus, the optimized coating processes of the electroless silver plating were the spray processes by adding the Tollen reagent and then the Dglucose to promote the adhesive values between the surfaces and silver element for the human beings health and the environment safety.

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Simple and environmentally friendly preparation and size control of silver nanoparticles using an inhomogeneous system with silver-containing glass powder

Cited by 29 publications

References 34 publications

Antiviral activity of silver nanoparticle/chitosan composites against H1N1 influenza A virus

Antiviral activity of silver nanoparticle/chitosan composites against H1N1 influenza A virus

Cytotoxicity of Silver Nanoparticle and Chitin-Nanofiber Sheet Composites Caused by Oxidative Stress

Comparisons of Fastness of the Coating Processes of Electroless Silver Plating on Polyethylene Membrane Surfaces

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