Influence of synthesis method on structural

Simple item page
dc.contributor.advisorNoukelag, Sandrine Kamdoum
dc.contributor.advisorNgqoloda, Siphelo
dc.contributor.advisorKotsedi, Lebogang
dc.contributor.authorNoukelag, Sandrine Kamdoum
dc.date.accessioned2024-06-12T07:09:11Z
dc.date.accessioned2024-10-30T10:23:35Z
dc.date.available2024-06-12T07:09:11Z
dc.date.available2024-10-30T10:23:35Z
dc.date.issued2023
dc.description>Magister Scientiae - MScen_US
dc.description.abstractThis contribution reports on the development of two versatile and efcient methods, namely the green and gamma radiolysis for Fe-Ag nanoparticles (NPs) synthesis, characterization, and further their growth inhibition potential on some spoilage microorganisms. Green Ag/Fe2O3 NPs were obtained at Fe-Ag [3:1], annealing temperature of 800 °C for 2 h, and gamma irradiated Ag/Fe3O4 NPs were obtained at Fe-Ag [7:1], a 50 kGy dose. The characterization techniques were performed with these two samples whereby the sizes from crystallographic and microscopic analyses were 39.59 and 20.00 nm for Ag/Fe2O3 NPs, 28.57 and 15.37 nm for Ag/Fe3O4 NPs, respectively. The polycrystallinity nature observed from X-ray diffraction was in accordance with the selected area electron difraction. The vibrational properties confrmed the presence of bimetallic Fe-Ag NPs with the depiction of chemical bonds, Fe–O and Ag–O from attenuated total refection-Fourier transform infrared spectroscopy and elements Ag, Fe, O from energy-dispersive X-ray spectroscopy analyses. The magnetic properties carried out using a vibrating sample magnetometer suggested a superparamagnetic behavior for the Ag/Fe2O3 NPs and a ferromagnetic behavior for the Ag/Fe3O4 NPs. Overall, the green Ag/Fe2O3 NPs successfully inhibited the growth of spoilage yeasts Candida guilliermondii, Zygosaccharomyces fermentati, Zygosaccharomyces forentinus, and spoilage molds Botrytis cinerea, Penicillium expansum, Alternaria alstroemeriae.en_US
dc.identifier.urihttps://hdl.handle.net/10566/16655
dc.language.isoenen_US
dc.publisherSpringeren_US
dc.rights.holderUniversity of the Western Capeen_US
dc.subjectRosmarinus officinalis leavesen_US
dc.subjectGamma radiolysisen_US
dc.subjectNanoparticlesen_US
dc.subjectMagnetic behavioren_US
dc.subjectAntimicrobialen_US
dc.titleInfluence of synthesis method on structuralen_US

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
noukalag_influence of Synthesis Method on structural_2023.pdf.pdf
Size:
1.22 MB
Format:
Adobe Portable Document Format
Description:
Article
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.71 KB
Format:
Plain Text
Description:
Download

Collections

Magister Scientiae - MSc (Physics)