Eco-friendly synthesis of silver and gold nanoparticles with enhanced antimicrobial, antioxidant, and catalytic activities

The present work is emphasised on the bio-fabrication of silver and gold nanoparticles in a single step by a microwave-assisted method using the leaf extract of Synedrella nodiflora as both reducing and stabilising agent. The synthesised nanoparticles are highly stable and show surface plasmon reson...

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Vydáno v:	IET nanobiotechnology Ročník 12; číslo 6; s. 850 - 856
Hlavní autoři:	Vijayan, Remya, Joseph, Siby, Mathew, Beena
Médium:	Journal Article
Jazyk:	angličtina
Vydáno:	England The Institution of Engineering and Technology 01.09.2018
Témata:	2,2‐diphenyl‐1‐picrylhydrazyl assay agar well diffusion method anthropogenic pollutant dyes Anti-Infective Agents - chemical synthesis Anti-Infective Agents - chemistry antibacterial activity antimicrobial activities antioxidant activities Antioxidants - chemical synthesis Antioxidants - chemistry area electron diffraction patterns Asteraceae - chemistry biofabrication catalysis Catalysis - drug effects catalytic activities Congo red crystal growth from solution dyes electron diffraction electron diffraction patterns eosin Y face‐centred cubic geometry field emission electron microscopy Fourier transform infrared spectroscopy Fourier transform spectra gold Gold - chemistry gold nanoparticles Green Chemistry Technology - methods infrared spectra Metal Nanoparticles - chemistry Microbial Sensitivity Tests microorganisms Microscopy, Electron, Transmission nanocomposites nanofabrication nanomedicine nanoparticles particle size pathogenic strains Plant Extracts - chemistry Plant Extracts - pharmacology Reducing Agents - chemistry Reducing Agents - pharmacology reduction (chemical) Research Article scanning electron microscopy silver Silver - chemistry silver nanoparticles Spectroscopy, Fourier Transform Infrared surface plasmon resonance Synedrella nodiflora synthesised nanoparticles transmission electron microscopy transmission electron microscopy images ultraviolet spectra UV–Vis spectrum visible spectra wavelength 413.0 nm wavelength 535.0 nm X-Ray Diffraction antibacterial activity particle size face-centred cubic geometry gold nanoparticles crystal growth from solution Ag nanofabrication X-ray diffraction catalysis pathogenic strains wavelength 413.0 nm nanocomposites visible spectra gold nanoparticles UV–Vis spectrum Congo red area electron diffraction patterns Au surface plasmon resonance transmission electron microscopy reduction (chemical) transmission electron microscopy images 2,2-diphenyl-1-picrylhydrazyl assay electron diffraction scanning electron microscopy antioxidant activities anthropogenic pollutant dyes eosin Y synthesised nanoparticles nanomedicine biofabrication catalytic activities dyes antimicrobial activities electron diffraction patterns Synedrella nodiflora ultraviolet spectra silver nanoparticles microorganisms field emission electron microscopy infrared spectra Fourier transform spectra silver Fourier transform infrared spectroscopy wavelength 535.0 nm agar well diffusion method
ISSN:	1751-8741, 1751-875X, 1751-875X
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Shrnutí:	The present work is emphasised on the bio-fabrication of silver and gold nanoparticles in a single step by a microwave-assisted method using the leaf extract of Synedrella nodiflora as both reducing and stabilising agent. The synthesised nanoparticles are highly stable and show surface plasmon resonance peak at 413 and 535 nm, respectively, for silver and gold nanoparticles in UV–Vis spectrum. The functional group responsible for the reduction of metal ions were obtained from Fourier transform infrared spectroscopy. The crystalline nature of nanoparticles with face-centred cubic geometry was confirmed by the X-ray diffraction and selected area electron diffraction patterns. The morphology and sizes of the silver and gold nanoparticles were obtained from transmission electron microscopy images. The nanoparticles exhibit effective antimicrobial activities against various pathogenic strains. These antimicrobial properties were analysed by employing agar well diffusion method. The nanoparticles show significant antioxidant properties, and it was determined using 2, 2-diphenyl-1-picrylhydrazyl assay. The nanoparticles also show potent catalytic activity in the degradation of anthropogenic pollutant dyes Congo red and eosin Y by excess NaBH4. Thus, the current study demonstrates the potential use of S. nodiflora as a reducing and stabilising agent for the synthesis of silver and gold nanoparticles and their relevance in the field of biomedicine and catalysis.
Bibliografie:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	1751-8741 1751-875X 1751-875X
DOI:	10.1049/iet-nbt.2017.0311