Silver, Gold, and Silver-Gold Bimetallic Nanoparticle-Decorated Dextran: Facile Synthesis and Versatile Tunability on the Antimicrobial Activity

Diem, Phan Nu Ha; Phuong, Ton Nu My; Hiến, Nguyễn Quốc; Quang, Duong Tuan; Hòa, Trần Thái; Cuong, Nguyen Duc

doi:10.1155/2020/7195048

Cited by 18 publications

(7 citation statements)

References 51 publications

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“…The maximum absorbance due to the surface plasmon resonance of the (Au-Ag-10) 0.5 nanoparticles was observed at 498 nm. The position of SPR in the case of (Au-Ag-10) 0.5 lying between the SPRs of (Ag-10) 0.5 and (Au-10) 0.5 justifies the formation of Au-Ag bimetallic NPs [46]. Furthermore, the position of SPR in the case of (Au-Ag-10) 0.5 was blue-shifted as compared to that of Au-10 NPs, suggesting a decrease in size in the bimetallic form as compared to Au-10 NPs [47].…”

Section: Uv-visible Spectroscopic Analysesmentioning

confidence: 85%

The Fabrication of Gold–Silver Bimetallic Colloids by Microplasma: A Worthwhile Strategy for Counteracting the Surface Activity of Avian Influenza Virus

et al. 2023

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In the present project, fructose-stabilized gold, silver and gold–silver bimetallic colloids have been synthesized by the electrochemical reduction of HAuCl4·3H2O (Au precursor) and AgNO3 (Ag precursor), employing the atmospheric pressure microplasma technique. X-Ray Diffraction patterns of gold–silver bimetallic particles exhibit (111), (200) and (220) planes identical to gold and silver NPs depicting FCC structures. The decrease in the peak intensities of Au–Ag (111) and Au–Ag (200) as compared to those of Au (111) and (200) is due to the formation of Au–Ag alloys. The FE-SEM image of gold–silver bimetallic NPs has revealed an adequate change in morphology as compared to the morphology of gold NPs and silver NPs. The majority of the gold–silver bimetallic NPs are spherical and are uniformly dispersed. The EDS spectra of (Au–Ag) confirm the presence of metallic gold and silver. The appearance of a single Surface Plasmon Resonance (SPR) peak in the UV–VIS absorption spectra of gold–silver colloids and its position in between the SPR peaks of the UV–VIS absorption spectra of gold and silver colloids justify the formation of gold–silver bimetallic alloy particles. In DLS measurements, the size distribution of gold–silver bimetallic colloids carries a narrow range 55 to 117 nm as compared to the size distribution of gold and silver colloids. The compatibility of the sizes of these colloids and the influenza virus belonging to the Orthomyxoviruses family (size range 80–300 nm with different morphologies) are assumed to stand responsible for an effective bio-conjunction with Influenza viruses. Au–Ag bimetallic nanostructures have synergistically improved their antiviral activity against H9N2 influenza virus as compared to monometallic AuNPs and AgNPs. Thus, the Au–Ag nanostructured alliance has been proven to be more effective and is capable of manifesting high antiviral efficacy.

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Section: Uv-visible Spectroscopic Analysesmentioning

confidence: 85%

The Fabrication of Gold–Silver Bimetallic Colloids by Microplasma: A Worthwhile Strategy for Counteracting the Surface Activity of Avian Influenza Virus

et al. 2023

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“…Ag NPs and Au/Ag NPs with high content of Ag showed much higher activity than Au NPs. Besides, Au/Ag BMNPs showed a versatile tunability on the antimicrobial activity according to the Ag content at the surface of the NPs [ 74 ].…”

Section: Biological Activity Profile Of Au/ag Bmnpsmentioning

confidence: 99%

State of the Art on Green Route Synthesis of Gold/Silver Bimetallic Nanoparticles

et al. 2022

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Recently, bimetallic nanoparticles (BMNPs) blending the properties of two metals in one nanostructured system have generated enormous interest due to their potential applications in various fields including biosensing, imaging, nanomedicine, and catalysis. BMNPs have been developed later with respect to the monometallic nanoparticles (MNPs) and their physicochemical and biological properties have not yet been comprehensively explored. The manuscript aims at collecting the main design criteria used to synthetize BMNPs focusing on green route synthesis. The influence of experimental parameters such as temperature, time, reagent concentrations, capping agents on the particle growth and colloidal stability are examined. Finally, an overview of their nanotechnological applications and biological profile are presented.

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“…e outcomes show that the optical transmittance of the MgO nanoparticles prepared by biosynthesis MgO nanoparticle with blue colour is greater than that of chemically prepared MgO nanoparticle with red colour, for wavelength greater than 450 nm. e higher transmittance also indicates a lower defect density of the MgO nanoparticle since absorption of light in the longer wavelength region (>500 nm) is frequently caused by crystalline faults such as grain boundaries and dislocations [35,36].…”

Section: Uv-visible Spectrophotometer Analysismentioning

confidence: 99%

Green Synthesis of Datura stramonium (Asaangira) Leaves Infusion for Antibacterial Activity through Magnesium Oxide (MgO) Nanoparticles

Saka¹,

Jule²,

Gudata³

et al. 2022

Advances in Materials Science and Engineering

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The biosynthesized magnesium oxide nanoparticles were pigeon-holed with X-ray diffraction (XRD), ultraviolet-visible (UV-Vis) spectrophotometer, scanning electron microscope (SEM), and photoluminescence spectrometer (PLs) and antibacterial activity. Datura stramonium leaves extract has been used in the present work,; which has medicinal value, and we have synthesized magnesium oxide nanoparticles from both chemical and biosynthesis techniques. The XRD result indicates the realization of crystalline magnesium oxide nanoparticles, and again it is also inveterated with an ultraviolet-visible (UV-Vis) spectrophotometer. The superficial morphology expresses that magnesium oxide nanoparticles have a bulbous morphological shape for both biosynthesis and chemosynthesis. The antibacterial activity of magnesium oxide nanoparticles obtained from Datura stramonium leaves against E. coli and S. aureus was studied. The antibacterial activity also shows a good zone of inhibition. Both techniques are promising for the preparations of MgO nanoparticles in antibacterial activity and show the same result. This outcome demonstrates that the biosynthesized nanoparticles originate from having some medicinal uses and are biodegradable.

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Silver, Gold, and Silver-Gold Bimetallic Nanoparticle-Decorated Dextran: Facile Synthesis and Versatile Tunability on the Antimicrobial Activity

Cited by 18 publications

References 51 publications

The Fabrication of Gold–Silver Bimetallic Colloids by Microplasma: A Worthwhile Strategy for Counteracting the Surface Activity of Avian Influenza Virus

The Fabrication of Gold–Silver Bimetallic Colloids by Microplasma: A Worthwhile Strategy for Counteracting the Surface Activity of Avian Influenza Virus

State of the Art on Green Route Synthesis of Gold/Silver Bimetallic Nanoparticles

Green Synthesis of Datura stramonium (Asaangira) Leaves Infusion for Antibacterial Activity through Magnesium Oxide (MgO) Nanoparticles

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