Biological application of green silver nanoparticle synthesized from leaf extract of Rauvolfia serpentina Benth

Panja, Sudipta; Chaudhuri, Indranil; Khanra, Kalyani; Bhattacharyya, Nandan

doi:10.1016/s2222-1808(16)61085-x

Cited by 37 publications

(16 citation statements)

References 28 publications

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“…The XRD patterns of the HNT-DMA and HNT-DMA-PPy@Ag nanocomposites are shown in Figure 5 b. One can note the presence of reflection peak situated at 11.9°, corresponding to the basal distance of the HNT clay d(001), moreover the presence of diffraction peaks at 19.9°, 24.5°, 35.1°, 38.3°, 54.6°, and 62.4° which confirm that the crystalline structure of HNT clay is well maintained in all samples [ 29 ], after pretreatment and upon photopolymerization ( Figure 5 b) The presence of diffraction peaks at 38.2°, 44.4°, 64.4°, and 77.39° are corresponding to the (111), (200), (220), and (311) diffraction planes of Ag, respectively [ 30 ]. These patterns confirm metallic nature of Ag nanoparticles, resulted upon the photopolymerization of Py in the presence of AgNO 3 [ 11 ], The AgNPs average size was equal 82 nm, the latter was estimated from the full width half maximum (FWHM) of the highest intensity (111) peak of Ag.…”

Section: Resultsmentioning

confidence: 68%

Synthesis of In Situ Photoinduced Halloysite-Polypyrrole@Silver Nanocomposite for the Potential Application in Humidity Sensors

et al. 2020

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Halloysite-polypyrrole-silver nanocomposite has been prepared via in situ photopolymerizations of pyrrole in the presence of silanized halloysite and silver nitrate as a photoinitiator. The halloysite nanoclay (HNT) was modified using the hydrogen donor silane coupling agent (DMA) in order to provide anchoring sites for the polypyrrole/silver composite (PPy@Ag). The mass loadings for both PPy and Ag have been estimated to be 21 and 26 wt%, respectively. The anchored Ag particles were found in the metallic state. The resulting PPy@Ag-modified silanized HNT has been evaluated for the potential application for impedance humidity sensors. HNT-DMA-PPy@Ag nanocomposite with different weight % of PPy@Ag (0.25 wt%, 0.5 wt%, and 1 wt%) was deposited on the pre-patterned interdigital Indium Tin Oxide (ITO) electrodes by spin coating technique. The addition of Ag nanoparticles within the nanocomposite enhances the hydrophilicity of the sensing film, which improves the sensitivity of the humidity sensors. The HNT-DMA-PPy@Ag (0.5 wt%) nanocomposite-based impedance sensors showed good sensitivity and lowered hysteresis as compared to the other ratios of the composite. The maximum calculated hysteresis loss of the HNT-DMA-PPy@Ag (0.5 wt%)-based humidity sensor is around 4.5% at 80% RH (relative humidity), and the minimum hysteresis loss estimated to be 0.05% at 20% RH levels. The response and recovery time of HNT-DMA-PPy@Ag (0.5 wt%) nanocomposite-based impedance sensors were found to be 30 and 35 s, respectively. The interesting humidity-dependent impedance properties of this novel composite make it promising in humidity sensing.

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Section: Resultsmentioning

confidence: 68%

Synthesis of In Situ Photoinduced Halloysite-Polypyrrole@Silver Nanocomposite for the Potential Application in Humidity Sensors

et al. 2020

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“…Finally, colloidal suspension of the El Ag NPs was centrifuged at 8000 rpm in Remi R-247M rotor for 30 min to remove impurities [30,31]. The pellet was re-suspended in sterile distilled water, and the previous step was repeated to wash the synthesized El Ag NPs [32,33] for several times.…”

Section: Synthesis Of Silver Nanoparticlesmentioning

confidence: 99%

“…Plant extracts consist a variety of organic c o m p o u n d s . D u r i n g t h e s y n t h e s i s o f s i l v e r nanoparticles, these compounds act as capping and reducing agents [33]. This change could be recorded by ultraviolet-visible spectroscopy (UV-Vis).…”

Section: Synthesis Of Silver Nanoparticlesmentioning

confidence: 99%

Biological and Photocatalytic Activity of Silver Nanoparticle Synthesized from Ehretia laevis Roxb. Leaves Extract

Panja¹,

Choudhuri²,

Khanra³

et al. 2020

Nano BioMed ENG

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Silver nanoparticles were synthesized from Ehretia laevis Roxb. leaf extract by one-step green synthesis method. The nanoparticles were crystalline in nature, spherical shaped with 25 to 35 nm diameter. The aim of this study was the synthesis and characterization of silver nanoparticles from Ehretia laevis Roxb., and the evaluation of their antimicrobial, anticancer, larvicidal and methylene blue dye degradation efficiency. The nanoparticles showed antimicrobial, larvicidal and cytotoxic activity. At a concentration of 25 µg/mL, it killed 70 ± 10.24% of Culex quinquefasciatus larvae after 72 h treatment. The median lethal concentration of the nanoparticles against HeLa, human cervical cancer cells, and MCF-7 human breast cancer cells, were calculated to 12.7 µg/mL and 14.5 µg/mL, respectively. The synthesized nanoparticles degraded Congo red ~ 85% within 8 h at a concentration of 200 µg/mL. Possible application of the synthesized nanoparticles are water purifying agent in presence of sunlight.

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“…During the latter years of the 1960s, scientists dedicated to miniaturized delivery systems introduced nanoparticle-based drug delivery systems and vaccines [1]. Since that application of nanoparticulates into medicine, the use of nanomaterials has yielded great advances in the diagnosis and treatment of numerous pathologies [2,3]. Cerium belongs to a class of lanthanide metals in the periodic table [4].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Cerium Oxide Nanoparticles Using Various Methods: Implications for Biomedical Applications

et al. 2020

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Cerium oxide nanoparticles have been used in a number of non-medical products over the years. The therapeutic application of these nanoparticles has mainly been due to their oxidative stress ameliorating abilities. Their enzyme-mimetic catalytic ability to change between the Ce3+ and Ce4+ species makes them ideal for a role as free-radical scavengers for systemic diseases as well as neurodegenerative diseases. In this review, we look at various methods of synthesis (including the use of stabilizing/capping agents and precursors), and how the synthesis method affects the physicochemical properties, their behavior in biological environments, their catalytic abilities as well as their reported toxicity.

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Biological application of green silver nanoparticle synthesized from leaf extract of Rauvolfia serpentina Benth

Cited by 37 publications

References 28 publications

Synthesis of In Situ Photoinduced Halloysite-Polypyrrole@Silver Nanocomposite for the Potential Application in Humidity Sensors

Synthesis of In Situ Photoinduced Halloysite-Polypyrrole@Silver Nanocomposite for the Potential Application in Humidity Sensors

Biological and Photocatalytic Activity of Silver Nanoparticle Synthesized from Ehretia laevis Roxb. Leaves Extract

Synthesis of Cerium Oxide Nanoparticles Using Various Methods: Implications for Biomedical Applications

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