20.500.12556/DKUM-16373 SINTEZA NANODELCEV Cu-NI ZA UPORABO V MAGNETNI HIPERTERMIJI SYNTHESIS OF Cu-Ni NANOPARTICLES FOR THE APPLICATION IN MAGNETIC HYPERTHERMIA Namen diplomskega dela je bil ugotoviti, kateri način sinteze, bi bil bolj primeren za pripravo magnetnih nanodelcev Cu-Ni z ustrezno sestavo za nadaljno uporabo pri pripravi magnetnih tekočin, uporabljenih v magnetni hipertermiji. Nanodelce smo sintetizirali s pomočjo mletja in mikroemulzij. S pomočjo rezultatov rentgenske praškovne difrakcije (XRD) smo ocenili velikost nanodelcev CuNi in kvalitativno karakterizirali vzorce. S termogravimetrično analizo (TGA) smo pri kontroliranem segrevanju določali Curiejevo temperaturo vzorcev. Morfologijo nanodelcev smo preučevali s transmisijskim elektronskim mikroskopom (TEM). Na koncu so bile izvedene še magnetne meritve z VSM magnetometrom. Optimalna Curijeva temperatura (Tc) 45°C je bila izmerjena pri vzorcu sestave: Cu27,5Ni72,5, ki smo ga pripravili z mletjem. Magnetne meritve so pokazale, da vzorci nimajo koercitivnosti, kar kaže na superparamagnetne lastnosti magnetnih delcev. Morfologija nanodelcev posneta s pomočjo TEM, nam kaže manjše zaglomerirane delce, ki ležijo na večjih ploščicah. Nanodelci vzorca Cu27,5Ni72,5 , ki smo ga sintetizirali z mletjem, bi bili torej najbolj primerni za uporabo v magnetni hipertermiji. The aim of this work was to determine, which way of synthesis is more appropriate for preparation of magnetic nanoparticles CuNi with suitable composition for further preparation of magnetic fluids, which can be used in magnetic hyperthermia. The size of magnetic nanoparticles was estimated by Scherrer equation. Samples were characterized with XRD analysis. Curie temperatures of the samples were mesured with termogravimetric analysis (TGA), during controlled heating. The morphology of nanoparticles was studied with transmission electron microscopy (TEM). Further, the magnetic properties of the samples were measured with VSM magnetometer. The results showed that the optimal Curie temperature (Tc) of 45°C was measured at sample composition: Cu27,5Ni72,5, prepared by milling method. Magnetic measurements indicate that magnetic nanoparticles exhibit superparamagnetic properties. The morphology of nanoparticles showed small agglomerated particles, which are located on large plates. Nanoparticles of sample Cu27,5Ni72,5 synthesized by milling method, would be most suitable for use in magnetic hyperthermia. mehansko mletje metoda mikroemulzij Curiejeva temperatura magnetna hipertermija magnetni nanodelci ball milling method microemulsion method Curie temperature magnetic hyperthermia magnetic nanoparticles true true false [J. Erker] Slovenski jezik Angleški jezik Diplomsko delo 2010-10-13 11:17:54 2010-10-26 10:29:38 2022-04-13 08:06:46 2023-12-20 03:30:43 2010 0 Maribor 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 546.057:[546.72+546.74](043.2) 14581014 URN:SI:UM:DK:RBQCOX8M UNI_Erker_Jasmina_2010.pdf UNI_Erker_Jasmina_2010.pdf 1 EDC2452A252962678ABE17FA4611E135 0463edc02b28863ef24c8651fe29257243f3c7d6088c3e1106277261eddba267 a26780b1-7c04-11eb-bb7a-00155d0001ca 20.500.12556/dkum/c32792dc-017d-4af1-bb40-0da0c773897f https://dk.um.si/Dokument.php?lang=slv&id=18536 Fakulteta za kemijo in kemijsko tehnologijo 0 0 0