Preparation and Antibacterial Activity of Silver Nanoparticles

Das, Ratan; Gang, Sneha; Nath, S.

doi:10.4236/jbnb.2011.24057

Cited by 70 publications

(36 citation statements)

References 8 publications

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“…The in situ reduction of silver ions into AgNPs in SS matrix has been demonstrated as an effective method to obtain good distribution and dispersion of AgNPs in the SS polymer matrix, where SS in the system acts as a reducing and/or a stabilizing agent. Similar results were reported by Das et al [30], Li et al [31], and Chao et al [32]. The surface morphology of the untreated and treated silk fabrics is presented in Figure 5a,b, respectively.…”

Section: Characterization Of Ss-agnp and Functionalized Silk Fabricssupporting

confidence: 88%

In Vitro Assessment of Sericin-Silver Functionalized Silk Fabrics for Enhanced UV Protection and Antibacterial Properties Using Experimental Design

Chitichotpanya

2017

Coatings

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Silk sericin (SS) was used as both a 3-dimensional matrix and reductant for the in situ synthesis of silver nanoparticles (AgNPs) finished on silk fabrics. We demonstrated enhanced UV protection and antibacterial properties using this synthesis which was an environmental friendly approach. Development and optimization was achieved using a central composite design (CCD) in conjunction with the response surface methodology (RSM). The goal was to identify the concentrations of SS and AgNO 3 that produced the optimal balance between UV protection and antibacterial activity, when tested against E. coli and S. aureus. The SS-AgNP bio-nanocomposites were characterized using Scanning Electron Microscope (SEM-EDX), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and Fourier transform infrared spectroscopy (FTIR). Statistical analyses indicated an empirical second-order polynomial could accurately model the experimental values. To confirm that the optimal levels from RSM worked in practice, performance evaluations were conducted, including tests of cytotoxicity, of the durability and stability of UV protection, as well as of the antibacterial activity of the functionalized fabrics after repeated standard washing. The results suggest that these bio-nanocomposites have great potential for multi-functionalization on silk fabrics. Our method has been shown to convert the waste material (SS) to a fabric with high added value.

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Section: Characterization Of Ss-agnp and Functionalized Silk Fabricssupporting

confidence: 88%

In Vitro Assessment of Sericin-Silver Functionalized Silk Fabrics for Enhanced UV Protection and Antibacterial Properties Using Experimental Design

Chitichotpanya

2017

Coatings

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“…Another widely accepted mechanism of bacterial cytotoxicity is the adhesion of AgNPs to the bacterial wall, followed by the infiltration of the particles, with bacterial cell membrane damage leading to the leakage of cellular contents and death [63,65]. In this context, the antimicrobial activity assessment of small sized AgNPs (12 nm) by Das et al [66] demonstrated these NPs to be excellent inhibitors against both Gram-positive and Gram-negative bacteria, including Staphylococcus bacillus, Staphylococcus aureus, and Pseudomonas aeruginosa. This indicates that both the membrane thickness and surface charge facilitates particle attachment onto the cell membrane [67].…”

Section: Agnps Application and Mechanism Of Actionmentioning

confidence: 99%

Health Impact of Silver Nanoparticles: A Review of the Biodistribution and Toxicity Following Various Routes of Exposure

Ferdous

Nemmar

2020

IJMS

603

340

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Engineered nanomaterials (ENMs) have gained huge importance in technological advancements over the past few years. Among the various ENMs, silver nanoparticles (AgNPs) have become one of the most explored nanotechnology-derived nanostructures and have been intensively investigated for their unique physicochemical properties. The widespread commercial and biomedical application of nanosilver include its use as a catalyst and an optical receptor in cosmetics, electronics and textile engineering, as a bactericidal agent, and in wound dressings, surgical instruments, and disinfectants. This, in turn, has increased the potential for interactions of AgNPs with terrestrial and aquatic environments, as well as potential exposure and toxicity to human health. In the present review, after giving an overview of ENMs, we discuss the current advances on the physiochemical properties of AgNPs with specific emphasis on biodistribution and both in vitro and in vivo toxicity following various routes of exposure. Most in vitro studies have demonstrated the size-, dose- and coating-dependent cellular uptake of AgNPs. Following NPs exposure, in vivo biodistribution studies have reported Ag accumulation and toxicity to local as well as distant organs. Though there has been an increase in the number of studies in this area, more investigations are required to understand the mechanisms of toxicity following various modes of exposure to AgNPs.

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“…Within each column, different letters indicated significant differences (P<0.05) Fig. 6 Inhibition zone induced by Sargassum muticumsynthesized silver nanoparticles against different bacteria species: a Bacillus subtilis, b Klebsiella pneumoniae, and c Salmonella typhi latest years, a growing number of studies have investigated the biotoxicity of green-synthesized AgNP against Gram-positive and Gram-negative bacteria (e.g., Ratan Das et al 2011;Yan Zhou et al 2012;Murugan et al 2015d; see Rajan et al 2015 for a recent review). As regards to the mechanism of inhibitory action of silver ions against bacteria, it has been proposed that the positive charge on the Ag + ion is crucial for antibacterial activity via the electrostatic attraction between the negative-charged cell membrane and nanoparticles with a positive charge (Hamouda and Baker 2000;Dibrov et al 2002;Dragieva et al 1999).…”

Section: Antibacterial Propertiesmentioning

confidence: 99%

S argassum muticum-synthesized silver nanoparticles: an effective control tool against mosquito vectors and bacterial pathogens

et al. 2015

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Mosquito-borne diseases represent a deadly threat for millions of people worldwide. Furthermore, pathogens and parasites polluting water also constitute a severe plague for populations of developing countries. In this research, silver nanoparticles (AgNP) were synthesized using the aqueous extract of the seaweed Sargassum muticum. The production of AgNP was confirmed by surface plasmon resonance band illustrated in UV-vis spectrophotometry. AgNP were characterized by FTIR, SEM, EDX, and XRD analyses. AgNP were mostly spherical in shape, crystalline in nature, with face-centered cubic geometry, and mean size was 43-79 nm. Toxicity of AgNP was assessed against Aedes aegypti, Anopheles stephensi, and Culex quinquefasciatus. In laboratory, AgNP were highly toxic against larvae and pupae of the three mosquito species. Maximum efficacy was observed against A. stephensi larvae, with LC50 ranging from 16.156 ppm (larva I) to 28.881 ppm (pupa). In the field, a single treatment with AgNP (10 × LC50) in water storage reservoirs was effective against the three mosquito vectors, allowing complete elimination of larval populations after 72 h. In ovicidal experiments, egg hatchability was reduced by 100% after treatment with 30 ppm of AgNP. Ovideterrence assays highlighted that 10 ppm of AgNP reduced oviposition rates of more than 70% in A. aegypti, A. stephensi, and C. quinquefasciatus (OAI = -0.61, -0.63, and -0.58, respectively). Antibacterial properties of AgNP were evaluated against Bacillus subtilis, Klebsiella pneumoniae, and Salmonella typhi using the agar disk diffusion and minimum inhibitory concentration protocol. AgNP tested at 50 ppm evoked growth inhibition zones larger than 5 mm in all tested bacteria. Overall, the chance to use S. muticum-synthesized AgNP for control of mosquito vectors seems promising since they are effective at low doses and may constitute an advantageous alternative to build newer and safer mosquito control tools. This is the first report about ovicidal activity of metal nanoparticles against mosquito vectors.

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Preparation and Antibacterial Activity of Silver Nanoparticles

Cited by 70 publications

References 8 publications

In Vitro Assessment of Sericin-Silver Functionalized Silk Fabrics for Enhanced UV Protection and Antibacterial Properties Using Experimental Design

In Vitro Assessment of Sericin-Silver Functionalized Silk Fabrics for Enhanced UV Protection and Antibacterial Properties Using Experimental Design

Health Impact of Silver Nanoparticles: A Review of the Biodistribution and Toxicity Following Various Routes of Exposure

S argassum muticum-synthesized silver nanoparticles: an effective control tool against mosquito vectors and bacterial pathogens

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