Self-organization of silver nanoparticles during synthesis of Ag–Au nanoalloy by UV irradiation method

Łukowiec, Dariusz; Radoń, Adrian

doi:10.1007/s10853-019-04136-w

Cited by 9 publications

(3 citation statements)

References 16 publications

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“…This coincides well with previous results (Kamli et al 2021). Figure 4b shows the SAED pattern which exhibits alternating dots and concentric rings, demonstrating that these NPs are polycrystalline (Łukowiec and Radoń 2020). SEM analyses showed that the particle shapes were spherically shaped, highly distributed, and polydisperse with uniform surfaces (Fig.…”

Section: Morphological Analysis Of Ag-febnpssupporting

confidence: 91%

A Novel Green Biosynthesis Approach and Structural Characterization of Ag–Fe Bimetallic Nanoparticles using the Red Alga Galaxaura rugosa

Ali,

Elsayed,

Shehawy

2023

Preprint

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A Novel green and eco-friendly approach has been used to biosynthesize Ag-Fe bimetallic nanoparticles (Ag-FeBNPs), mediated by an aqueous extract of the red alga species; Galaxaura rugosa. The surface plasmon resonance band is positioned at 264 nm for Ag-FeBNPs. X-ray diffraction analysis (XRD) illustrated the crystalline nature of biogenic nanoparticles. Transmission electron microscopy (TEM) and selected area electron diffraction (SAED) showed that the particles have a crystalline spherical shape with a size range from 14.3 to 22.1 nm. Scanning electron microscopy (SEM) and Energy dispersive analysis (EDAX) give the surface morphology and elemental composition of Ag-FeBNPs which is spherical in high intensity. Fourier transmittance infrared spectroscopy (FTIR) showed that the biomolecules are responsible for forming and stabilizing Ag-FeBNPs. Zeta potential values show − 15.7 mV. The findings of this study documented the great potentiality of Ag-FeBNPs that would significantly impact the field of nanobiotechnology and nanoscience in the future.

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Section: Morphological Analysis Of Ag-febnpssupporting

confidence: 91%

A Novel Green Biosynthesis Approach and Structural Characterization of Ag–Fe Bimetallic Nanoparticles using the Red Alga Galaxaura rugosa

Ali,

Elsayed,

Shehawy

2023

Preprint

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“…Other studies also showed the characterization of elemental composition of ZnONPs and their purity using EDX [53,54]. The formation of agglomerated spherically shaped AgNPs by the UV irradiation method have been reported previously [52]. However, there is no report which involves the C. equisetifolia leaf-extract-mediated synthesis of ZnONPs under the influence of UV-A and UV-C radiation.…”

Section: Energy-dispersive X-ray (Edx) Analysismentioning

confidence: 95%

Effect of UV Irradiation (A and C) on Casuarina equisetifolia-Mediated Biosynthesis and Characterization of Antimicrobial and Anticancer Activity of Biocompatible Zinc Oxide Nanoparticles

et al. 2021

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The green synthesis of nanoparticles has emerged as a simple, safe, sustainable, reliable and eco-friendly protocol. Among different types of NPs, green-synthesized zinc oxide NPs (ZnONPs) show various promising biological uses due to their interesting magnetic, electrical, optical and chemical characteristics. Keeping in view the dependence of the therapeutic efficacy of NPs on their physico-chemical characteristics, the green synthesis of ZnONPs using Casuarina equisetifolia leaf extract under UV-A and UV-C light was carried out in this study. UV-irradiation helped to control the size and morphology of ZnONPs by exciting the electrons in the photoactive compounds of plant extracts to enhance the bio-reduction of ZnO into ZnONPs. C. equisetifolia leaf extract was found enriched with phenolic (2.47 ± 0.12 mg GAE/g DW) and flavonoid content (0.88 ± 0.28 mg QE/g DW) contributing to its 74.33% free-radical scavenging activity. FTIR spectra showed the involvement of polyphenols in the bio-reduction, stabilization and capping of ZnONPs. Moreover, SEM-EDX and XRD analyses showed great potential of UV-C light in yielding smaller (34–39 nm) oval-shaped ZnONPs, whereas UV-A irradiation resulted in the formation of fairly spherical 67–71 nm ZnONPs and control ZnONPs were of mixed shape and even larger size (84–89 nm). Green-synthesized ZnONPs, notably CE-UV-C-ZnONPs, showed promising anti-bacterial activities against Bacillus subtilis, Pseudomonas fluorescens and Pseudomonas aeruginosa. Moreover, ZnONPs also enhanced ROS production which led to a significant loss of mitochondrial membrane potential and activated caspase-3 gene expression and caspase-3/7 activity in human hepatocellular carcinoma (HepG2) cells. CE-UV-C-ZnONP treatment reduced HepG2 cell viability to as low as 36.97% owing to their unique shape and smaller size. Lastly, ZnONPs were found to be highly biocompatible towards brine shrimp and human red blood cells suggesting their bio-safe nature. This research study sheds light on the plausible role of UV radiation in the green synthesis of ZnONPs with reasonable control over their size and morphology, thus improving their biological efficacy.

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“…Moreover, the different chemical structures of the polymers enable specific interactions with the metallic surface, triggering significant variations in the size and shape of the obtained metallic NPs [ 66 ]. Some studies have detailed the impact of various polymers on the characteristics of Ag NPs and Au NPs, such as poly(vinyl pyrrolidone) (PVP) [ 2 , 96 , 97 ], polymethacrylate (PMA) [ 98 ], poly-, mono-saccharides and proteins (chitosan, glucose, dextrose, gelatin) [ 41 , 89 , 94 , 96 ], sodium dodecyl sulfate (SDS) [ 99 ], and natural rubber (NR) latex [ 66 ]. Additionally, the experimental parameters determine the NP features and morphology, namely, the use and nature of the stabilizers, pH of the reaction medium, precursor concentration, exposure time, and, importantly, light source and wavelength [ 100 , 101 ].…”

Section: Photochemical Processesmentioning

confidence: 99%

Photochemical Synthesis of Gold and Silver Nanoparticles—A Review

et al. 2021

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Nanomaterials have supported important technological advances due to their unique properties and their applicability in various fields, such as biomedicine, catalysis, environment, energy, and electronics. This has triggered a tremendous increase in their demand. In turn, materials scientists have sought facile methods to produce nanomaterials of desired features, i.e., morphology, composition, colloidal stability, and surface chemistry, as these determine the targeted application. The advent of photoprocesses has enabled the easy, fast, scalable, and cost- and energy-effective production of metallic nanoparticles of controlled properties without the use of harmful reagents or sophisticated equipment. Herein, we overview the synthesis of gold and silver nanoparticles via photochemical routes. We extensively discuss the effect of varying the experimental parameters, such as the pH, exposure time, and source of irradiation, the use or not of reductants and surfactants, reagents’ nature and concentration, on the outcomes of these noble nanoparticles, namely, their size, shape, and colloidal stability. The hypothetical mechanisms that govern these green processes are discussed whenever available. Finally, we mention their applications and insights for future developments.

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Self-organization of silver nanoparticles during synthesis of Ag–Au nanoalloy by UV irradiation method

Cited by 9 publications

References 16 publications

A Novel Green Biosynthesis Approach and Structural Characterization of Ag–Fe Bimetallic Nanoparticles using the Red Alga Galaxaura rugosa

A Novel Green Biosynthesis Approach and Structural Characterization of Ag–Fe Bimetallic Nanoparticles using the Red Alga Galaxaura rugosa

Effect of UV Irradiation (A and C) on Casuarina equisetifolia-Mediated Biosynthesis and Characterization of Antimicrobial and Anticancer Activity of Biocompatible Zinc Oxide Nanoparticles

Photochemical Synthesis of Gold and Silver Nanoparticles—A Review

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