The green synthesis, characterization and evaluation of the biological activities of silver nanoparticles synthesized from Iresine herbstii leaf aqueous extracts

Dipankar, C.; Murugan, S.

doi:10.1016/j.colsurfb.2012.04.006

Cited by 494 publications

(246 citation statements)

References 21 publications

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“…The analysis showed a sharp plasmon resonance of 3 mM AgNO 3 at nearly 437 nm (Fig. 2), consistent with previous reports of peaks in the absorption spectrum of 400-500 nm due to SPR in AgNPs [35,36]. Without any physical or chemical capping agents, the NPs were dispersed.…”

Section: Uv-vis Spectroscopysupporting

confidence: 77%

Biosynthesis of silver nanocomposite with Tarragon leaf extract and assessment of antibacterial activity

et al. 2018

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The aqueous extract of Tarragon, as a reducing agent, was used to synthesize silver-montmorillonite (MMT) nanocomposite (Ag-MMT-NPs) in the batch method. The leaf extract and metal solution concentrations were optimized to improve Ag-MMT-NPs synthesis in 48 h. For characterizing the nanocomposite, powder X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), Transmission electron microscopy (TEM), and UV-Vis spectroscopy were performed. The peak was observed at 437 nm on the UV-Vis spectrum, showing the surface plasmon resonance of Ag-MMT-NPs. Using XRD analysis, the crystalline nature and purity of Ag-MMT-NPs were confirmed. FTIR was used to evaluate specific functional groups, causing a reduction in silver nitrate during Ag-MMT-NPs formation. According to TEM, the average particle size was 25.12 nm in AgNPs. The nanocomposite showed antibacterial properties against Gram-negative and Gram-positive bacteria (Escherichia coli and Staphylococcus aureus).

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Section: Uv-vis Spectroscopysupporting

confidence: 77%

Biosynthesis of silver nanocomposite with Tarragon leaf extract and assessment of antibacterial activity

et al. 2018

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“…While comparing the FTIR peaks, the aqueous extract of Cs and CsAgNPs, there is a decrease in the intensity of peaks and also withdrawal of peaks at major spectrum were observed. The reason may be that the hydroxyl groups of phenols and amide groups of proteins forming a layer to the nanoparticles and acting as capping agents to prevent agglomeration and providing stability to the medium [36,37] …”

Section: Characterization Studiesmentioning

confidence: 99%

Green Synthesis of Silver Nanoparticles Using Cosmos Sulphureus and Evaluation of Their Antimicrobial and Antioxidant Properties

Malaka¹,

Hema²,

Muthukumarasamy³

et al. 2016

Nano BioMed ENG

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The present study intended to synthesize, characterize silver nanoparticles (AgNPs) using Cosmos sulphureus (Cs) aqueous leaf extract and their antimicrobial and antioxidant activities. The UV-vis spectrophotometer exhibited an absorbance peak around 430-440 nm with color intensity from yellow to reddish brown after 4 days. SEM and EDX analysis showed AgNPs were pure and polydispersed and the size were ranging from 55 to 80 nm. XRD revealed that the nanoparticles were cubic and face centered in shape and the biogenic CsAgNPs showed effective potent antimicrobial and antioxidant activities. This study may serve as a tool for analyzing the controlled release of synthesized AgNPs, which have prospective role in the field of disease management particularly with respect to resistant pathogenic microorganisms.

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“…The functional characterization of biomolecules present in the GSNPs from the leaf extract of G. sylvestre was done by FTIR spectrometry (RX1; PerkinElmer, Waltham, MA, USA). 44 The crystal lattice and the size of the synthesized NPs were determined by XRD measurements using an XRD-6000 X-ray diffractometer (Shimadzu, Kyoto, Japan). The crystallite domain size was calculated from the width of the XRD peaks, as described in our previous papers.…”

Section: Synthesis Of Snpsmentioning

confidence: 99%

Potential anticancer properties of bioactive compounds of Gymnema sylvestre and its biofunctionalized silver nanoparticles

Arunachalam¹,

Arun²,

Annamalai³

et al. 2014

IJN

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Background Gymnema sylvestre is an ethno-pharmacologically important medicinal plant used in many polyherbal formulations for its potential health benefits. Silver nanoparticles (SNPs) were biofunctionalized using aqueous leaf extracts of G. sylvestre . The anticancer properties of the bioactive compounds and the biofunctionalized SNPs were compared using the HT29 human adenoma colon cancer cell line. Methods The preliminary phytochemical screening for bioactive compounds from aqueous extracts revealed the presence of alkaloids, triterpenes, flavonoids, steroids, and saponins. Biofunctionalized SNPs were synthesized using silver nitrate and characterized by ultraviolet–visible spectroscopy, scanning electron microscopy, energy-dispersive X-ray analysis, Fourier transform infrared spectroscopy, and X-ray diffraction for size and shape. The characterized biofunctionalized G. sylvestre were tested for its in vitro anticancer activity against HT29 human colon adenocarcinoma cells. Results The biofunctionlized G. sylvestre SNPs showed the surface plasmon resonance band at 430 nm. The scanning electron microscopy images showed the presence of spherical nanoparticles of various sizes, which were further determined using the Scherrer equation. In vitro cytotoxic activity of the biofunctionalized green-synthesized SNPs (GSNPs) indicated that the sensitivity of HT29 human colon adenocarcinoma cells for cytotoxic drugs is higher than that of Vero cell line for the same cytotoxic agents and also higher than the bioactive compound of the aqueous extract. Conclusion Our results show that the anticancer properties of the bioactive compounds of G. sylvestre can be enhanced through biofunctionalizing the SNPs using the bioactive compounds present in the plant extract without compromising their medicinal properties.

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The green synthesis, characterization and evaluation of the biological activities of silver nanoparticles synthesized from Iresine herbstii leaf aqueous extracts

Cited by 494 publications

References 21 publications

Biosynthesis of silver nanocomposite with Tarragon leaf extract and assessment of antibacterial activity

Biosynthesis of silver nanocomposite with Tarragon leaf extract and assessment of antibacterial activity

Green Synthesis of Silver Nanoparticles Using Cosmos Sulphureus and Evaluation of Their Antimicrobial and Antioxidant Properties

Potential anticancer properties of bioactive compounds of Gymnema sylvestre and its biofunctionalized silver nanoparticles

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