Preparation of Au and Ag nanoparticles using Artemisia annua and their in vitro antibacterial and tyrosinase inhibitory activities

Basavegowda, Nagaraj; Idhayadhulla, Akbar; Lee, Yong Rok

doi:10.1016/j.msec.2014.06.043

Cited by 70 publications

(35 citation statements)

References 56 publications

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“…The calculated lattice constant is in good agreement with the reported value and the sample exhibits smaller cell volumes. Earlier workers reported similar results for Ag nanoparticles (Gopinath et al 2012;Basavegowda et al 2014;Bindhu and Umadevi 2013). …”

Section: Xrd Studiessupporting

confidence: 72%

Characterization of silver nanoparticles by green synthesis method using Pedalium murex leaf extract and their antibacterial activity

2015

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In this paper, an aqueous extract of fresh leaves of Pedalium murex was used for the synthesis of silver (Ag) nanoparticles. Different biological methods are gaining recognition for the production of silver nanoparticles (AgNPs) due to their multiple applications. The use of plants in the green synthesis of nanoparticles emerges as a cost-effective and eco-friendly approach. Characterization of nanoparticles was done using different methods, which include; ultraviolet-visible spectroscopy (UV-Vis), Fourier transform infrared (FTIR), powder X-ray diffraction (XRD), field emission scanning electron microscope (FE-SEM), energy dispersive X-ray analysis (EDAX), fluorescence emission spectroscopy, transmission electron microscope (TEM), dynamic light scattering (DLS), zeta potential and antibacterial activity. UV-visible spectrum of the aqueous medium containing silver nanoparticles showed absorption peak at around 430 nm. Fourier transform infrared spectra had shown that the biomolecule compounds were responsible for the reduction and capping material of silver nanoparticles. XRD study showed the particles to be crystalline in nature, with a face-centered cubic (fcc) structure. The size and stability were detected using DLS and zeta potential analysis. The antibacterial activity of AgNPs against generally found bacteria was assessed to find their potential use in silver-containing antibacterial product.

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Section: Xrd Studiessupporting

confidence: 72%

Characterization of silver nanoparticles by green synthesis method using Pedalium murex leaf extract and their antibacterial activity

2015

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“…The absence of other diffraction peaks present in XRD pattern is observed, which indicates that the synthesized Ag NPs are essentially pure. Similar results were reported in silver nanoparticles using artemisia annua extract [35]. From the observation Table 1, it is clearly understood that 5 mL leaf extract concentration is more suitable for synthesis small size Ag NPs.…”

Section: Structural Analysissupporting

confidence: 84%

Green Synthesis and Characterization of Silver Nanoparticles Using Vitex negundo (Karu Nochchi) Leaf Extract and its Antibacterial Activity

alakshmi¹,

Venugobal²

2017

Med chem

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The present paper focuses on the synthesis of silver nanoparticles using with different leaf extract concentrations of Vitex negundo. The biosynthesized nanoparticles were characterized by UV-vis absorption spectrophotometry, fourier transform infrared spectroscopy, X-ray diffraction, field emission scanning electron microscopy, energy dispersive X-ray, atomic force microscopy, transmission electron microscopy, photoluminescence and zeta potential techniques. The formation of silver nanoparticles was confirmed by the surface plasmon resonance absorption peak at 423 nm in UV-vis absorption spectra of the synthesized silver nanoparticles. The fourier transform infrared spectroscopy indicates flavonoids as a potential reduced agents. Field emission scanning electron microscopy shows the synthesized silver nanoparticles are in spherical shape. Energy dispersive X-ray spectroscopy shows the strong peak belongs to silver, and it confirms the formation of Ag NPs. X-ray diffraction spectra of synthesized silver nanoparticles exhibit they are in face centered cubic crystalline structure. The photoluminescence spectra of synthesized silver nanoparticles show their emission peak at 489-481 nm and the emission intensity is proportional to the different concentrations of leaf extract. The spherical shaped silver nanoparticles are observed by atomic force microscopy technique. The zeta potential value is observed at -13.5 mV, which shows the synthesized silver nanoparticles are incipient instability. The antimicrobial activity of the synthesized nanoparticles is studied using the disc diffusion method, which indicates that both Gram positive and Gram negative microorganisms have been affected by the silver nanoparticles. The observed antibacterial activity could be find important applications in medicine, biology and industry.

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“…Nayak et al, 2015 synthesized silver nanoparticles from Cucurbita maxima (petals), Moringa oleifera (leaves) and Acorus calamus (rhizome). Similar applications in the field of antimicrobial properties and enzymatic inhibition were achieved by synthesis of biofunctionalized silver nanoparticles, by making use of the leaf extract of Gymnema sylvestre (Arunachalam et al, 2014), Artemisia annua (Basavegowda et al, 2014), Melia dubia (Kathiravan et al, 2014) and Delonix elata (Sathiya and Akilandeswari, 2014). Nanoparticle research has also been carried out to prove its efficacy against vector mosquitoes ( M.erythrophylla is an evergreen shrub with dense hairs on the stems and can grow upto 7 -10 m tall.…”

Section: Introductionmentioning

confidence: 98%

Phyto-synthesis of silver nanoparticles from Mussaenda erythrophylla leaf extract and their application in catalytic degradation of methyl orange dye

Varadavenkatesan

Selvaraj

Vinayagam

2016

Journal of Molecular Liquids

130

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Preparation of Au and Ag nanoparticles using Artemisia annua and their in vitro antibacterial and tyrosinase inhibitory activities

Cited by 70 publications

References 56 publications

Characterization of silver nanoparticles by green synthesis method using Pedalium murex leaf extract and their antibacterial activity

Characterization of silver nanoparticles by green synthesis method using Pedalium murex leaf extract and their antibacterial activity

Green Synthesis and Characterization of Silver Nanoparticles Using Vitex negundo (Karu Nochchi) Leaf Extract and its Antibacterial Activity

Phyto-synthesis of silver nanoparticles from Mussaenda erythrophylla leaf extract and their application in catalytic degradation of methyl orange dye

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