Synthesis and characterization of silver nanoparticles by chemical reduction method

Khatoon, Umme Thahira; Rao, K. Venkateswara; Rao, J.V.Ramana; Aparna, Y.

doi:10.1109/iconset.2011.6167920

Cited by 14 publications

(9 citation statements)

References 4 publications

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“…In another words, for the ZnO thin film embedded with Ag nanostructure, three XRD peaks of the (1 1 1), (2 0 0), and (2 2 0) planes were indexed to silver, which was fcc phase-matched, confirming Ag as the secondary phase based on the JCPDS card No. 04-0783 [ 27 ]. Additionally, the Scherrer formula was used to determine the crystalline size for the (1 0 1) plane, the highest characteristic peak [ 28 , 29 ].…”

Section: Resultsmentioning

confidence: 99%

Ag/ZnO Thin Film Nanocomposite Membrane Prepared by Laser-Assisted Method for Catalytic Degradation of 4-Nitrophenol

et al. 2022

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Zinc oxide thin film (ZnO thin film) and a silver-doped zinc oxide nanocomposite thin film (Ag/ZnO thin film) were prepared by the technique of the pulsed laser deposition at 600 °C to be applicable as a portable catalytic material for the removal of 4-nitrophenol. The nanocomposite was prepared by making the deposition of the two targets (Zn and Ag), and it was analyzed by different techniques. According to the XRD pattern, the hexagonal wurtzite crystalline form of Ag-doped ZnO NPs suggested that the samples were polycrystalline. Additionally, the shifting of the diffraction peaks to the higher angles, which denotes that doping reduces the crystallite size, illustrated the typical effect of the dopant Ag nanostructure on the ZnO thin film, which has an ionic radius less than the host cation. From SEM images, Ag-doping drastically altered the morphological characteristics and reduced the aggregation. Additionally, its energy band gap decreased when Ag was incorporated. UV spectroscopy was then used to monitor the catalysis process, and Ag/ZnO thin films had a larger first-order rate constant of the catalytic reaction K than that of ZnO thin film. According to the catalytic experiment results, the Ag/ZnO thin film has remarkable potential for use in environmentally-favorable applications.

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Section: Resultsmentioning

confidence: 99%

Ag/ZnO Thin Film Nanocomposite Membrane Prepared by Laser-Assisted Method for Catalytic Degradation of 4-Nitrophenol

et al. 2022

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“…AgNPs were synthesized with the chemical methods using a metal precursor (AgNO 3 , silver nitrate), a reducing agent (NaBH 4 , sodium borohydride) and a stabilizing/capping agent (sodium citrate, Na 3 C 6 H 5 O 7 ). 13,14 The results of the reaction were yellowish-brown AgNPs. 15,16 The optical density of the AgNPs suspension was measured at room temperature at a resolution of 1 nm using a Lambda 25 double beam UV-visible spectrophotometer (PerkinElmer, Waltham, MA, USA).…”

Section: Synthesis and Characterization Of Agnpsmentioning

confidence: 99%

Interaction of Silver Nanoparticles with Human Alpha-2-macroglobulin: Biochemical and Biophysical Investigation

Siddiqui

Zia

Muaz

et al. 2022

Mol Cell Biomed Sci

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Background: Silver nanoparticles (AgNPs) have a broad spectrum of applications in nanoscience and nanomedicine due to their flexible properties, such as antibacterial, antifungal, anti-inflammatory and anti-angiogenic. Present study investigated the interaction of chemically synthesized AgNPs with human major antiproteinase alpha-2-macroglobulin (α2M).Materials and methods: The first step of the study involved the synthesis and characterization of AgNPs using various biochemical and biophysical techniques, such as UV-visible spectroscopy, fluorescence quenching spectroscopy, synchronous fluorescence, and circular dichroism (CD). Different methods were used to explore the primary and secondary structural changes induced in α2M by the binding of AgNPs. Results: The UV-visible spectroscopy revealed hyperchromicity in the absorption spectra of α2M. The presence of a static quenching mechanism was indicated by the temperature-dependent fluorescence spectroscopy. The synchronous fluorescence revealed a change in the microenvironment of the tryptophan residues in α2M. The CD results showed the reduction in β-helical content of α2M. The activity of α2M decreased significantly with the increase of AgNPs concentration.Conclusion: Our result suggests that AgNPs cause modifications in the structure and functional activity of α2M. The interaction of nanoparticles with proteins is important for understanding their potential risks to human health. Keywords: alpha-2-macroglobulin, antiproteinase, silver nanoparticles, fluorescence quenching, FTIR, TEM

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“…It was apparent that the spectral sensitivity or relative shift in resonance wavelength with respect to the reflective index by varying neighboring materials has two controlling factors: the bulk plasma wavelength, a property reliant on the metal nature, and the aspect ratio of element which is a geometrical parameter. The optical band gap of Ag NPs from the absorption spectrum by the Tauc's relation is calculated by [14]:…”

Section: E Photometry (Ultraviolet Visible Spectroscopy (Uv-vis))mentioning

confidence: 99%

Low-Cost Synthesis and Characterization of Silver Nanoparticles for Diverse Sensing Application

Akhtar

Farid²,

Ahmed

et al. 2019

Eng. Technol. Appl. Sci. Res.

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Silver (Ag) nanoparticles (NPs) are synthesized and characterized by a low-cost chemical reduction method. Silver nanoparticles (Ag NPs) have pre-occupied the consideration of the scientific community due to their wide range of functions, utility and industrial applications, particularly in the fields of sensing technologies and medicine (particularly their efficiency against microbes, the ability of healing the wound and anti-inflammatory properties). Ag NPs are synthesized by a low-cost fabrication method. X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray diffraction (EDX) and photometry techniques are used in this work to identify their nature and potentiality for diverse applications in sensing technologies.

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Synthesis and characterization of silver nanoparticles by chemical reduction method

Cited by 14 publications

References 4 publications

Ag/ZnO Thin Film Nanocomposite Membrane Prepared by Laser-Assisted Method for Catalytic Degradation of 4-Nitrophenol

Ag/ZnO Thin Film Nanocomposite Membrane Prepared by Laser-Assisted Method for Catalytic Degradation of 4-Nitrophenol

Interaction of Silver Nanoparticles with Human Alpha-2-macroglobulin: Biochemical and Biophysical Investigation

Low-Cost Synthesis and Characterization of Silver Nanoparticles for Diverse Sensing Application

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