Influence of synthesis method on structural
dc.contributor.advisor | Noukelag, Sandrine Kamdoum | |
dc.contributor.advisor | Ngqoloda, Siphelo | |
dc.contributor.advisor | Kotsedi, Lebogang | |
dc.contributor.author | Noukelag, Sandrine Kamdoum | |
dc.date.accessioned | 2024-06-12T07:09:11Z | |
dc.date.accessioned | 2024-10-30T10:23:35Z | |
dc.date.available | 2024-06-12T07:09:11Z | |
dc.date.available | 2024-10-30T10:23:35Z | |
dc.date.issued | 2023 | |
dc.description | >Magister Scientiae - MSc | en_US |
dc.description.abstract | This 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.uri | https://hdl.handle.net/10566/16655 | |
dc.language.iso | en | en_US |
dc.publisher | Springer | en_US |
dc.rights.holder | University of the Western Cape | en_US |
dc.subject | Rosmarinus officinalis leaves | en_US |
dc.subject | Gamma radiolysis | en_US |
dc.subject | Nanoparticles | en_US |
dc.subject | Magnetic behavior | en_US |
dc.subject | Antimicrobial | en_US |
dc.title | Influence of synthesis method on structural | en_US |