Green synthesis of colloidal silver nanoparticles using natural rubber latex extracted from Hevea brasiliensis

Guidelli, Éder José; Ramos, Ana Paula; Zaniquelli, Maria Elisabete Darbello; Baffa, Oswaldo

doi:10.1016/j.saa.2011.07.024

Cited by 160 publications

(67 citation statements)

References 36 publications

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“…Similar results were reported for AgNPs in the literature. (Jagtap and Bapa 2013;Das et al 2013;Edison and Sethuraman 2013;Raman et al 2012;Zayed et al 2012;Dipankar and Murugan 2012;Bindhu and Umadevi 2013;Guidelli et al 2011).…”

Section: Xrd Analysismentioning

confidence: 99%

Rapid green synthesis of silver nanoparticles by aqueous extract of seeds of Nyctanthes arbor-tristis

2015

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The present study explores that the aqueous extract of the seeds of Nyctanthes arbor-tristis (aka night jasmine) is very efficient for the synthesis of stable AgNPs from aqueous solution of AgNO 3 . The extract acts as both reducing (from Ag ? to Ag 0 ) and capping agent in the aqueous phase. The constituents in extract are mainly biomolecules like carbohydrates and phenolic compounds, which are responsible for the preparation of stable AgNPs within 20 min of reaction time at 25°C using without any severe conditions. The synthesized silver nanoparticles were characterized with UV-Visible spectroscopy, FT-IR, XRD and SEM. UV-Vis spectroscopy analysis showed peak at 420 nm, which corresponds to the surface plasmon resonance of AgNPs. XRD results showed peaks at (111), (200), (220), which confirmed the presence of AgNPs with face-centered cubic structure. The uniform spherical nature of the AgNPs and size (between 50 and 80 nm) were further confirmed by SEM analysis.

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Section: Xrd Analysismentioning

confidence: 99%

Rapid green synthesis of silver nanoparticles by aqueous extract of seeds of Nyctanthes arbor-tristis

2015

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“…A number of researchers have successfully synthesized silver nanoparticles, but use of this green, one-pot, four-component method overcomes some of the disadvantages previously reported using other methods, such as impurities, solvent toxicity, difficulty in controlling particle size and distribution, economic viability, and problems in preparation that limit their commercialization potential. 12,15,18,20 The major advantage of this method of synthesis of silver nanoparticles, relative to other methods, is most certainly use of PGA as the capping agent. PGA is a nontoxic, hydrophilic, and biodegradable polymer utilized to enhance the stability and cytocompatibility of silver nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

Effect of poly-α, γ, L-glutamic acid as a capping agent on morphology and oxidative stress-dependent toxicity of silver nanoparticles

Stevanović¹,

Kovačević²,

Petković³

et al. 2011

IJN

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Highly stable dispersions of nanosized silver particles were synthesized using a straightforward, cost-effective, and ecofriendly method. Nontoxic glucose was utilized as a reducing agent and poly-α, γ, L-glutamic acid (PGA), a naturally occurring anionic polymer, was used as a capping agent to protect the silver nanoparticles from agglomeration and render them biocompatible. Use of ammonia during synthesis was avoided. Our study clearly demonstrates how the concentration of the capping agent plays a major role in determining the dimensions, morphology, and stability, as well as toxicity of a silver colloidal solution. Hence, proper optimization is necessary to develop silver colloids of narrow size distribution. The samples were characterized by Fourier transform infrared spectroscopy, ultraviolet-visible spectroscopy, field-emission scanning electron microscopy, transmission electron microscopy, and zeta potential measurement. MTT assay results indicated good biocompatibility of the PGA-capped silver nanoparticles. Formation of intracellular reactive oxygen species was measured spectrophotometrically using 2,7-dichlorofluorescein diacetate as a fluorescent probe, and it was shown that the PGA-capped silver nanoparticles did not induce intracellular formation of reactive oxygen species.

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“…Another band at 1634 cmG 1 was due to stretching vibration of (NH) C = O group. The decrease in intensity at 1543 cmG 1 after the reduction of AgNO 3 indicates the involvement of the secondary amine in the reduction process (Guidelli et al, 2011). The shift of band 1634 cmG 1 was due to the binding of (NH) C=O group with nanoparticles.…”

Section: Discussionmentioning

confidence: 93%

Tuber Extract Mediated Biosynthesis of Silver Nanoparticles and its Antioxidant, Antibacterial Activity

Sivakumar¹,

Gajalakshmi²,

Subramania³

et al. 2015

J. of Biological Sciences

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A B S T R A C TThe biosynthesis of silver nanoparticles by the reduction of aqueous silver metal ions during revelation to both fresh, dry tuber extract and in vitro antioxidant, antibacterial activity of sweet potato were studied. Tuber extract of sweet potato was prepared for the synthesis of silver nanoparticles under different reaction time. The prepared materials were characterized by UV-visible spectroscopy, X-Ray Diffraction (XRD) and Fourier Transform Infrared Spectroscopy (FT-IR). During incubation period, the intensity of colour increased and its characteristic absorption was recorded at 428 and 439 nm. X-ray diffraction showed that the average particles size 4.77 and 5.6 nm. The FT-IR spectra of the tuber extract and synthesized silver nanoparticles revealed the reducing and capping actions of biomolecules such as amine, peptide, amide, lactone, polyphenol groups in protein linkages and it was found to be involved in the stabilization and biosynthesis of AgNPs. Scanning Electron Microscopy (SEM) showed silver nanoparticles was pure and the sizes were ranging from 1-10 µm. Green synthesized silver nanoparticles exhibited strong antioxidant and effective antibacterial activity against human pathogenic bacteria. Thus, green synthesis seems to be cost effective and alternate to conventional methods of silver nanoparticles synthesis. No synthetic reagent were used in this investigation and thus it is an environmentally safe method with potential for biomedical and agriculture application.

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Green synthesis of colloidal silver nanoparticles using natural rubber latex extracted from Hevea brasiliensis

Cited by 160 publications

References 36 publications

Rapid green synthesis of silver nanoparticles by aqueous extract of seeds of Nyctanthes arbor-tristis

Rapid green synthesis of silver nanoparticles by aqueous extract of seeds of Nyctanthes arbor-tristis

Effect of poly-α, γ, L-glutamic acid as a capping agent on morphology and oxidative stress-dependent toxicity of silver nanoparticles

Tuber Extract Mediated Biosynthesis of Silver Nanoparticles and its Antioxidant, Antibacterial Activity

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Green synthesis of colloidal silver nanoparticles using natural rubber latex extracted from Hevea brasiliensis

Cited by 160 publications

References 36 publications

Rapid green synthesis of silver nanoparticles by aqueous extract of seeds of Nyctanthes arbor-tristis

Rapid green synthesis of silver nanoparticles by aqueous extract of seeds of Nyctanthes arbor-tristis

Effect of poly-&alpha;, &gamma;, L-glutamic acid as a capping agent on morphology and oxidative stress-dependent toxicity of silver nanoparticles

Tuber Extract Mediated Biosynthesis of Silver Nanoparticles and its Antioxidant, Antibacterial Activity

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Effect of poly-α, γ, L-glutamic acid as a capping agent on morphology and oxidative stress-dependent toxicity of silver nanoparticles