Green synthesis of silver nanoparticles and silver colloidal solutions

Phong, Nguyen Thi Phuong; Minh, Ngo Hoang; Thanh, Ngo Vo Ke; Dang, Chien Mau

doi:10.1088/1742-6596/187/1/012078

Cited by 5 publications

(4 citation statements)

References 8 publications

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“…Colloidal AgNPs synthesized using sol-gel method with size 20–45 nm were found effective against bacterial strains such as E. coli, S. aureus, B. subtilis, Salmonella typhimurium, P. aeruginosa , and K. pneumoniae as well as fungal strain C. albicans at MIC of 2–4 μg/ml (Lkhagvajav et al, 2011). 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%

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

confidence: 99%

Mechanistic Basis of Antimicrobial Actions of Silver Nanoparticles

et al. 2016

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“…Silver colloids were prepared by treating silver oxalate with polyvinyl pyrrolidone (PVP) under microwave irradiation and the particle size controlled by altering several factors [40]. Electrochemical fabrication of silver nanoparticles on the glassy carbon electrode by conventional reduction method was accomplished using 1-butyl-3-methylimidazolium tetrafluoroborate [41,42].…”

Section: Chemical Synthesismentioning

confidence: 99%

Biosynthesis of Silver Nanoparticles and Its Applications

Firdhouse

Pottail

2015

Journal of Nanotechnology

197

112

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Silver nanoparticles possess unique properties which find myriad applications such as antimicrobial, anticancer, larvicidal, catalytic, and wound healing activities. Biogenic syntheses of silver nanoparticles using plants and their pharmacological and other potential applications are gaining momentum owing to its assured rewards. This critical review is aimed at providing an insight into the phytomediated synthesis of silver nanoparticles, its significant applications in various fields, and characterization techniques involved.

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“…(Figure 1) At 48 hours of incubation of the solution a dark brown solution was formed and there was no further change in the color of the solution after this timing indicating the completion of the reaction. The change in the color of the solution is the first stage of confirmatory of the reduction of silver ion (Ag + ) into silver nanoparticle (Ag 0 ) (Phong et al, 2009). Silver nitrate solution without plant extract and the methanolic extract of piper betel was set as a control in this experiment and it does not reveal a visible change of color (Roy et al, 2012).…”

Section: Discussionmentioning

confidence: 99%

Rapid Biogenic and Uv-Vis Spectroscopic Study of Silver Nanoparticle Synthesis by Methanolic Extract of Piper Species

Nasrudin

Shanthriga

Rahman

2019

JMS

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Nanotechnology is one of the most developing areas which involve utilization of materials with structural dimension in of 1-100 nm. This technology opened a pathway for the synthesis of silver nanoparticle by various physical and chemical methods. The biosynthesis method from plant extracts are considered as alternative as it is relatively simple, nontoxic, and environmentally friendly methods. The objective was to synthesize and characterize silver nanoparticle via ultraviolet visible spectroscopy of silver nanoparticles from three piper species which are Piper nigrum, Piper sarmentosum and Piper betel. Silver nanoparticles were prepared by the reaction of 1 mM of 90 ml silver nitrate and 10 ml methanolic leaf extract of each type of plant that act as reductant and stabilizer. The synthesized nanoparticle was characterized by color changes from green into dark brown with increasing intensity of the color from 10 minutes until 48 hour indicating the completion of silver nanoparticle formation at 48 hour. A UV–Vis spectrum of the methanolic medium containing silver nanoparticles demonstrated a peak at 413 nm, 417 nm and 420 nm for Piper nigrum, Piper sarmentosum and Piper betel respectively that corresponds to the plasmon absorbance of silver nanoparticles. The maximum percentage increase in the rate of absorbance was found specifically at 24 hour in all the three leaf. In conclusion piper species is a source for synthesizing silver nanoparticles and Piper nigrum being an excellent source for the synthesis due to the narrow, sharp peak and showing maximum percentage increase at 24 hour among all the three plants. This study exhibited the potential of three methanolic extract of piper species for the green synthesis of silver nanoparticles.

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Green synthesis of silver nanoparticles and silver colloidal solutions

Cited by 5 publications

References 8 publications

Mechanistic Basis of Antimicrobial Actions of Silver Nanoparticles

Mechanistic Basis of Antimicrobial Actions of Silver Nanoparticles

Biosynthesis of Silver Nanoparticles and Its Applications

Rapid Biogenic and Uv-Vis Spectroscopic Study of Silver Nanoparticle Synthesis by Methanolic Extract of Piper Species

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