Rapid synthesis of Au, Ag, and bimetallic Au core–Ag shell nanoparticles using Neem (Azadirachta indica) leaf broth

Shankar, S. Shiv; Rai, Akhilesh; Ahmad, Absar; Sastry, Murali

doi:10.1016/j.jcis.2004.03.003

Cited by 2,348 publications

(1,314 citation statements)

References 35 publications

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“…The above synthetic protocol by plant extract or biomass exemplifies the promising application of the green synthesis of metal nanoparticles. Recent research reported that silver nanoparticles have been synthesized using various natural products like green tea (Camellia sinensis) [14] , neem (Azadirachta indica) leaf broth [15] , natural rubber [16] , Aloe vera plant extract [17] , latex of Jatropha curcas [1] , etc.…”

Section: Catharanthus Roseusmentioning

confidence: 99%

Catharanthus roseus: a natural source for the synthesis of silver nanoparticles

Mukunthan

Elumalai

Patel

et al. 2011

Asian Pacific Journal of Tropical Biomedicine

173

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Section: Catharanthus Roseusmentioning

confidence: 99%

Catharanthus roseus: a natural source for the synthesis of silver nanoparticles

Mukunthan

Elumalai

Patel

et al. 2011

Asian Pacific Journal of Tropical Biomedicine

173

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“…It is revealed that bacteria within biofilm are responsible for more than 80 % infectious diseases as well as more resistance to antibiotics [1]. In recent years, due to unique physical and chemical properties of nanoparticles, its uses to disrupt biofilm of bacteria are revolutionary steps in antimicrobial research [2][3][4][5][6][7][8][9][10][11][12][13]. The uses of silver and silver compounds are very well known from ancient time in case of dental work, catheters and burn wounds etc.…”

Section: Introductionmentioning

confidence: 99%

“…The uses of silver and silver compounds are very well known from ancient time in case of dental work, catheters and burn wounds etc. Thus, among the various inorganic metal nanoparticles, silver (Ag) nanoparticles have received substantial attention in the field of biological system, living organisms and medicine [3][4][5][7][8][9][10][11][12][13]. To use in biological field the metal nanoparticles should be biocompatible and free from toxic chemicals which are used to synthesis nanoparticles in traditional chemical process.…”

Section: Introductionmentioning

confidence: 99%

Antibacterial Activity of Green Synthesized Silver Nanoparticles Using Vasaka (Justicia adhatoda L.) Leaf Extract

Bose¹,

Chatterjee²

2015

Indian J Microbiol

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There is an increasing demand for silver nanoparticles due to its wide applicability in various area of biological science such as in field of antimicrobial and therapeutics, biosensing, drug delivery etc. To use in bioprocess the silver nanoparticles should be biocompatible and free from toxic chemicals. In the present study we report a cost effective and environment friendly route for green synthesis of silver nanoparticles using Vasaka (Justicia adhatoda L.) leaf extract as reducing as well as capping agent. This plant has been opted for the present study for its known medicinal properties and it is easily available. The biosynthesized silver nanoparticles are characterized by UV-Vis spectroscopy and TEM analysis. It is observed the nanoparticles are well shaped and the average particle size is 20 nm in the range of 5-50 nm. The antibacterial activity of these nanoparticles against Pseudomonas aeruginosa MTCC 741 has been measured by disc diffusion method, agar cup assay and serial dilution turbidity measurement assay. The results show green synthesized silver nanoparticles, using Vasaka leaf extract, have a potential to inhibit the growth of bacteria.

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“…Notably, the shape of metal nanoparticles considerably changes their optical and electronic properties (Xu and Käll 2002). As a general trend, the shape of plant-synthesized AgNPs was mostly spherical (Benelli 2016a) with exception of neem (Azadirachta indica), which yielded polydisperse particles both with spherical and flat nanoparticles of 5-35 nm in size (Shankar et al 2004). Concerning seaweeds, Madhiyazhagan et al (2015) studied S. muticum-synthesized AgNP indicating that they were mostly spherical, well-dispersed and ranged in sizes 43-79 nm.…”

Section: Resultsmentioning

confidence: 93%

“…The utilization of plants for nanoparticle synthesis can be advantageous over other biological processes, because it eliminates the elaborate process of maintaining cell cultures and can also be suitably scaled up for large-scale nanoparticle synthesis (Shankar et al 2004;Chandramohan et al 2016;Jaganathan et al 2016). Recently, several plants have been screened for efficient and rapid extracellular synthesis of metal nanoparticles with different mosquitocidal and antisplamodial properties (Benelli 2016a, b).…”

Section: Introductionmentioning

confidence: 99%

Eco-friendly drugs from the marine environment: spongeweed-synthesized silver nanoparticles are highly effective on Plasmodium falciparum and its vector Anopheles stephensi, with little non-target effects on predatory copepods

Murugan

Panneerselvam

Subramaniam

et al. 2016

Environ Sci Pollut Res

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Mosquitoes act as vectors of devastating pathogens and parasites, representing a key threat for millions of humans and animals worldwide. The control of mosquito-borne diseases is facing a number of crucial challenges, including the emergence of artemisinin and chloroquine resistance in Plasmodium parasites, as well as the presence of mosquito vectors resistant to synthetic and microbial pesticides. Therefore, eco-friendly tools are urgently required. Here, a synergic approach relying to nanotechnologies and biological control strategies is proposed. The marine environment is an outstanding reservoir of bioactive natural products, which have many applications against pests, parasites, and pathogens. We proposed a novel method of seaweed-mediated synthesis of silver nanoparticles (AgNP) using the spongeweed Codium tomentosum, acting as a reducing and capping agent. AgNP were characterized by UV-Vis spectroscopy, Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), and X-ray diffraction (XRD). In mosquitocidal assays, the 50 % lethal concentration (LC 50 ) of C. tomentosum extract against Anopheles stephensi ranged from 255.1 (larva I) to 487.1 ppm (pupa). LC 50 of C. tomentosum-synthesized AgNP ranged from 18.1 (larva I) to 40.7 ppm (pupa). In laboratory, the predation efficiency of Mesocyclops aspericornis copepods against A. stephensi larvae was 81, 65, 17, and 9 % (I, II, III, and IV instar, respectively). In AgNP contaminated environment, predation was not affected; 83, 66, 19, and 11 % (I, II, III, and IV). The anti-plasmodial activity of C. tomentosum extract and spongeweed-synthesized AgNP was evaluated against CQ-resistant (CQ-r) and CQ-sensitive (CQ-s) strains of Plasmodium falciparum. Fifty percent inhibitory concentration (IC 50 ) of C. tomentosum were 51.34 μg/ml (CQ-s) and 65.17 μg/ml (CQ-r); C. tomentosum-synthesized AgNP achieved IC 50 of 72.45 μg/ml (CQ-s) and 76.08 μg/ml (CQ-r). Furthermore, low doses of the AgNP inhibited the growth of Bacillus subtilis, Klebsiella pneumoniae, and Salmonella typhi, using the agar disk diffusion and minimum inhibitory concentration protocol. Overall, C. tomentosum metabolites and spongeweed-synthesized AgNP may be potential candidates to develop novel and effective tools in the fight against Plasmodium parasites and their mosquito vectors. The employ of ultra-low doses of nanomosquitocides in synergy with cyclopoid crustaceans seems a promising green route for effective mosquito control programs.

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Rapid synthesis of Au, Ag, and bimetallic Au core–Ag shell nanoparticles using Neem (Azadirachta indica) leaf broth

Cited by 2,348 publications

References 35 publications

Catharanthus roseus: a natural source for the synthesis of silver nanoparticles

Catharanthus roseus: a natural source for the synthesis of silver nanoparticles

Antibacterial Activity of Green Synthesized Silver Nanoparticles Using Vasaka (Justicia adhatoda L.) Leaf Extract

Eco-friendly drugs from the marine environment: spongeweed-synthesized silver nanoparticles are highly effective on Plasmodium falciparum and its vector Anopheles stephensi, with little non-target effects on predatory copepods

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