A review on plants extract mediated synthesis of silver nanoparticles for antimicrobial applications: A green expertise

Ahmed, Shakeel; Ahmad, Mudasir; Swami, Babu Lal; Ikram, Saiqa

doi:10.1016/j.jare.2015.02.007

Cited by 2,171 publications

(1,187 citation statements)

References 68 publications

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“…A lot of work has been done on green synthesis of silver nano-particles using microorganisms including bacteria, fungi and plants because of their antioxidant properties capable of reducing metal compounds in their respective nanoparticle. Plant extracts produce best capping material for the stabilization of silver nanoparticles (Ahmed et al 2015).…”

Section: Introductionmentioning

confidence: 99%

Green synthesis of silver nanoparticles using Azadirachta indica leaf extract and its antimicrobial study

et al. 2017

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In this study, green synthesis of silver nanoparticles was done using leaf extracts of Azadirachta indica. The flavonoids and terpenoids present in the extract act as both reducing and capping agent. Microbes (Escherichia coli and Gram-positive bacteria) were isolated from borewell water using selective media. The silver nanoparticles showed antimicrobial activities against Gram-positive bacteria and E. coli. However the silver nanoparticles were more effective against E. coli as compared to Gram-positive bacteria. Various techniques were used to characterize synthesized silver nanoparticles such as DLS and UVvisible spectrophotometer. The absorbance peak was in the range of 420-450 nm, that varied depending upon the variation in the concentration of neem extract. This is a very rapid and cost-effective method for generation of silver nanoparticle at room temperature, however, its exact dose in water purification has to be determined.

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Section: Introductionmentioning

confidence: 99%

Green synthesis of silver nanoparticles using Azadirachta indica leaf extract and its antimicrobial study

et al. 2017

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“…The use of plant extract is most popular due to its simplicity and low cost [5]. The synthesis of AgNPs using plant extract is a rapid, eco-friendly, non-toxic and providing only a single step technique for the synthesis process [6].…”

Section: Introductionmentioning

confidence: 99%

Green synthesis of silver nanoparticle using rambutan (Nephelium lappaceum L.) peel extract and its antibacterial activity against Salmonella parathypi A.

2018

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Abstract. Ag nanoparticles (AgNPs) have been synthesized via green method using rambutan (Nephelium lappaceum L.) peel (RP) extract. RP extract was prepared by washing the RP using tap water thoroughly and boiling it in distilled water at 70°C for 60 min. RP extract and AgNO3 were used as the starting materials for the synthesis of AgNPs. RP extract was added to 10 -3 M AgNO3 solution with a ratio by volume of 1:10 (RP : AgNO3), stirred at room temperature. The solution's color changes from reddish to dark brown, indicating the reduction of Ag + in the solution. The synthesized AgNPs were characterized using UV-Visible Spectrophotometer, FTIR Spectrophotometer, and Scanning Electron Microscopy-Energy-dispersive X-ray Spectroscopy (SEM-EDS) instruments. UV-Visible spectra show that the AgNPs have the maximum absorption band at 450 nm which is typical for AgNPs. The FTIR spectra revealed that the protein in RP extract acts as the capping agent for the synthesized AgNPs. The synthesized AgNPs were tested for their antibacterial activity against Salmonella parathypi A. The antibacterial test shows that 50 µL of AgNPs resulted in the inhibition zone of 4 mm against the aforementioned microorganism.

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“…It was proposed that Ag(I) ion enters the cell and intercalates between the purine and pyrimidine base pairs disrupting the hydrogen bonding between the two anti-parallel strands and denaturing the DNA molecule. Bacterial cell lysis could be one of the reasons for antibacterial property of plant extract mediated silver nanoparticles (Ahmed et al, 2016).…”

Section: Discussionmentioning

confidence: 99%

Pharmacological Assessment, Green synthesis and Characterization of Silver Nanoparticles of Sonneratia apetala Buch.-Ham. Leaves

2017

J App Pharm Sci

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The present investigation evaluates phytochemical screening, antibacterial, antioxidant activities and green synthesis, characterization of silver nanoparticles and its antibacterial activity. Three dissimilar solvents viz., hexane, ethyl acetate and methanol were used to prepare crude extracts of Sonneratia apetala leaves to study the phytochemicals, antibacterial and antioxidant activities. Green synthesis, characterization of silver nanoparticles (AgNPs) and its antibacterial activity using S. apetala leaves were also studied. Antioxidant activity was examined by means of DPPH free radical scavenging method. AgNPs were synthesized by using 1mM AgNO 3 solution mixed with leaf aqueous extract of S. apetala. The characterization of the prepared AgNPs was done by UV-Vis spectrometry, FTIR spectroscopy and Scanning electron microscopy. Antibacterial activity was studied by agar well diffusion method. The phytochemical screening results unveiled the bearing of different phytochemicals viz., flavonoids, alkaloids, saponins, carbohydrates, terpenoids, steroids, tannins and free anthraquinones particularly with relatively high abundance in methanol extract. Likewise methanol extract too exhibited effective free radical scavenging and antibacterial activities. The characterization results of the prepared AgNPs displayed that the silver nanoparticles are formed and stabilized by plant phyto-constituents and also exhibited virtuous antibacterial property with great antagonism towards Proteus mirabilis with 27.3 mm diameter zone of inhibition. Green synthesis process is a pivotal area in nanotechnology and usage of natural resources is the best choice for the making of NPs as a sustainable, eco-friendly, inexpensive and free of chemical contaminant method. These AgNPs have several potential biological and medical applications.

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A review on plants extract mediated synthesis of silver nanoparticles for antimicrobial applications: A green expertise

Abstract: Graphical abstract

Cited by 2,171 publications

References 68 publications

Green synthesis of silver nanoparticles using Azadirachta indica leaf extract and its antimicrobial study

Green synthesis of silver nanoparticles using Azadirachta indica leaf extract and its antimicrobial study

Green synthesis of silver nanoparticle using rambutan (Nephelium lappaceum L.) peel extract and its antibacterial activity against Salmonella parathypi A.

Pharmacological Assessment, Green synthesis and Characterization of Silver Nanoparticles of Sonneratia apetala Buch.-Ham. Leaves

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