Control Size and Stability of Colloidal Silver Nanoparticles with Antibacterial Activity Prepared by a Green Synthesis Method

Dehnavi, Arefeh Sadat; Raisi, Ahmadreza; Aroujalian, Abdolreza

doi:10.1080/15533174.2012.741182

Cited by 46 publications

(29 citation statements)

References 30 publications

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“…In the first step, a stable colloidal aqueous solution of Ag nanoparticles was prepared by reducing Ag nitrate using diammonium hydrogen citrate as a stabiliser, sodium hydroxide solution as pH adjuster and fructose as a reducing agent according to the method previously described by Dehnavi et al . (). In the second step, corona air plasma was employed for the surface modification of LDPE films to increase the adhesion of the Ag nanoparticles on the film surface.…”

Section: Methodsmentioning

confidence: 97%

Surface coating of silver nanoparticles on polyethylene for fabrication of antimicrobial milk packaging films

Bandpey

Aroujalian

Raisi

et al. 2016

Int J of Dairy Tech

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In this study, antimicrobial packaging films were prepared by coating silver (Ag) nanoparticles onto the surface of low density polyethylene (LDPE) films modified by corona air plasma. The possibility of these films for use in the packaging of milk was studied. The influence of input power of the corona discharge treatment on the surface modification and performance of the fabricated Ag/LDPE nanocomposite films was also investigated. The prepared antimicrobial packaging films showed promising antimicrobial efficiency against micro-organisms that are present in milk and were able to increase the microbial shelf life of the milk. Packages fabricated at corona input powers of 210, 500 and 800 W reached the maximum limit after 5, 8 and 14 days (respectively).

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Section: Methodsmentioning

confidence: 97%

Surface coating of silver nanoparticles on polyethylene for fabrication of antimicrobial milk packaging films

Bandpey

Aroujalian

Raisi

et al. 2016

Int J of Dairy Tech

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“…The colloidal solution of silver nanoparticles was prepared by the procedure previously described by Dehnavi et al . In this procedure, 1 g of fructose and 0.1 g of diammonium hydrogen citrate were dissolved in 1 l of distilled water, and the pH of the solution was adjusted to 9.5 by a 1 M ammonia solution. The solution was stirred continually and heated until the temperature reached 80°C and remained constant at this temperature.…”

Section: Methodsmentioning

confidence: 99%

Preparation and characterization of polyethersulfone/silver nanocomposite ultrafiltration membrane for antibacterial applications

Toroghi

Raisi

Aroujalian

2014

Polymers for Advanced Techs

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Antimicrobial ultrafiltration membranes were prepared by coating silver nanoparticles on the surface of polyethersulfone (PES) membranes which were fabricated via phase inversion induced by the immersion precipitation technique, and their morphology and performance were compared with the antimicrobial PES membranes synthesized by adding the silver nanoparticles into the casting solution during the phase inversion process. For this purpose, stable and uniform colloidal solutions of the silver nanoparticles were prepared by chemical reduction of silver salt using fructose and dimethylformamide as a reducing agent. The silver nanoparticles were characterized by ultraviolet–visible spectroscopy, X‐ray powder diffraction and dynamic light scattering analysis. The morphology and surface properties of the prepared membranes were examined by field emission scanning electron microscopy and atomic force microscopy analysis. Moreover, the separation properties, antimicrobial efficiency and amount of silver release from the PES nanocomposite membranes during the cross flow ultrafiltration were determined. The results indicated that the silver content of the coated PES membranes was greater than the membranes fabricated by the solution blending method. Also, the permeation flux of the silver‐coated membranes was similar to the neat PES membranes, while the membranes prepared by the second approach had less flux. The membranes synthesized by both coating and blending methods showed high antimicrobial and bactericidal activity against gram‐negative bacteria such as Escherichia coli and gram‐positive bacteria such as Staphylococcus aureus. Finally, the prepared antimicrobial membranes were successfully used for the ultrafiltration of raw milk to reduce the microbial load during the concentration process. Copyright © 2014 John Wiley & Sons, Ltd.

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“…On the contrary, AgNPs in liquid system have showed only limited applications as bacteriocidal agents because of their low colloidal stability (Kumar et al, 2014; Shi et al, 2014). Colloidal silver appears to be a powerful, antibacterial therapy against infections because it serves as a catalyst and destabilize the enzymes that pathogenic drug-resistant bacteria, fungi, yeast, and viruses essentially need for their oxygen utilization (Dehnavi et al, 2012; Kumar et al, 2014; Suganya et al, 2015). For instance, colloidal AgNPs possess enhanced bactericidal potential against drug-resistant Gram-positive and Gram-negative bacteria and MRSA (Sondi and Salopek-Sondi, 2004; Panacek et al, 2006; Lkhagvajav et al, 2011).…”

Section: Effects Of Nanoscale and Physico-chemical Properties On Antimentioning

confidence: 99%

“…In addition, use of γ-radiation (Shin et al, 2004), microwave irradiation (Phong et al, 2009), Tollen's process (Yin et al, 2002) and rational use of mechanistic understanding (Wuithschick et al, 2013) has made it possible to produce colloidal AgNPs with smaller size and narrow size distribution. Recently, green synthesis has come up as a novel synthesis procedure for producing colloidal AgNPs with controlled size, high stability and improved antibacterial activity (Dehnavi et al, 2012). …”

Section: Effects Of Nanoscale and Physico-chemical Properties On Antimentioning

confidence: 99%

“…Use of highly sophisticated techniques such as high resolution microscopic (AFM, FE-SEM, TEM, and XRD), spectroscopic (DLS, ESR spectroscopy, Fluorescence spectroscopy, Inductively coupled plasma-optical emission spectroscopy, UV-vis), molecular, and biochemical techniques have provided deep mechanistic insights about the mode of antimicrobial action of AgNPs (Sondi and Salopek-Sondi, 2004; Kim et al, 2007; Pal et al, 2007; Dehnavi et al, 2012; Rai et al, 2012). The antimicrobial action of AgNPs is linked with four well-defined mechanisms: (1) adhesion of AgNPs onto the surface of cell wall and membrane, (2) AgNPs penetration inside the cell and damaging of intracellular structures (mitochondria, vacuoles, ribosomes) and biomolecules (protein, lipids, and DNA), (3) AgNPs induced cellular toxicity and oxidative stress cause by generation of reactive oxygen species (ROS) and free radicals, and (4) Modulation of signal transduction pathways.…”

Section: Effects Of Nanoscale and Physico-chemical Properties On Antimentioning

confidence: 99%

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Mechanistic Basis of Antimicrobial Actions of Silver Nanoparticles

et al. 2016

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Multidrug resistance of the pathogenic microorganisms to the antimicrobial drugs has become a major impediment toward successful diagnosis and management of infectious diseases. Recent advancements in nanotechnology-based medicines have opened new horizons for combating multidrug resistance in microorganisms. In particular, the use of silver nanoparticles (AgNPs) as a potent antibacterial agent has received much attention. The most critical physico-chemical parameters that affect the antimicrobial potential of AgNPs include size, shape, surface charge, concentration and colloidal state. AgNPs exhibits their antimicrobial potential through multifaceted mechanisms. AgNPs adhesion to microbial cells, penetration inside the cells, ROS and free radical generation, and modulation of microbial signal transduction pathways have been recognized as the most prominent modes of antimicrobial action. On the other side, AgNPs exposure to human cells induces cytotoxicity, genotoxicity, and inflammatory response in human cells in a cell-type dependent manner. This has raised concerns regarding use of AgNPs in therapeutics and drug delivery. We have summarized the emerging endeavors that address current challenges in relation to safe use of AgNPs in therapeutics and drug delivery platforms. Based on research done so far, we believe that AgNPs can be engineered so as to increase their efficacy, stability, specificity, biosafety and biocompatibility. In this regard, three perspectives research directions have been suggested that include (1) synthesizing AgNPs with controlled physico-chemical properties, (2) examining microbial development of resistance toward AgNPs, and (3) ascertaining the susceptibility of cytoxicity, genotoxicity, and inflammatory response to human cells upon AgNPs exposure.

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Control Size and Stability of Colloidal Silver Nanoparticles with Antibacterial Activity Prepared by a Green Synthesis Method

Cited by 46 publications

References 30 publications

Surface coating of silver nanoparticles on polyethylene for fabrication of antimicrobial milk packaging films

Surface coating of silver nanoparticles on polyethylene for fabrication of antimicrobial milk packaging films

Preparation and characterization of polyethersulfone/silver nanocomposite ultrafiltration membrane for antibacterial applications

Mechanistic Basis of Antimicrobial Actions of Silver Nanoparticles

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