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Title:SINTEZA NANODELCEV CuNi V REVERZNIH MICELAH ZA UPORABO V MAGNETNI HIPERTERMIJI
Authors:Schmidt, Janko (Author)
Ban, Irena (Mentor) More about this mentor... New window
Files:.pdf VS_Schmidt_Janko_2011.pdf (5,28 MB)
 
Language:Slovenian
Work type:Undergraduate thesis (m5)
Organization:FKKT - Faculty of Chemistry and Chemical Engineering
Abstract:Namen diplomskega dela je bil poiskati parametre sinteze z metodo obarjanja v reverznih micelah oz. mikroemulzijah in nadaljnje obdelave, ki bi dajali CuNi magnetne nanodelce, za uporabo v magnetni hipertermiji. Z uporabo titracijske metode in ternarnih faznih diagramov smo preverili obmocja stabilnosti mikroemulzij, ki vsebujejo prekurzorje, potrebne za sintezo. Sintetizirali smo CuNi magnetne nanodelce razlicnih sestav, katere smo nadalje termicno modificirali. Vzorcem smo dolocili velikost delcev in jih kvalitativno analizirali z rentgensko praškovno difrakcijo (XRD). S termogravimetricno analizo (TGA) smo vzorcem dolocili Curiejevo temperaturo (Tc). Morfologijo nanodelcev smo preucili s transmisijskim elektronskim mikroskopom (TEM). Na koncu smo izvedli še magnetne meritve na magnetometru z vibrirajocim vzorcem (VSM). Oblika histerezne krivulje kaže, da imajo sintetizirani, "as prepared", delci vzorca množinske sestave Cu30Ni70 histerezno zanko z majhno koercitivnostjo. Morfologija sintetiziranega vzorca je kazala na mocno aglomeracijo delcev. Ta vzorec, ki smo ga nadalje termicno izotermno obdelovali tri ure na 500 °C v Ar/H2 atmosferi, je imel željeno Curiejevo temperaturo 45 °C. Tako pripravljen vzorec bi bil najbolj primeren za uporabo v magnetni hipertermiji. Iz rezultatov sklepamo, da so potrebne dodatne raziskave v smeri zmanjšanja aglomeracije med sintezo delcev.
Keywords:reverzne micele, magnetni nanodelci, Curiejeva temperatura, kemijsko soobarjanje, magnetna hipertermija
Year of publishing:2011
Publisher:[J. Schmidt]
Source:Maribor
UDC:544.567:620.3(043.2)
COBISS_ID:15224854 Link is opened in a new window
NUK URN:URN:SI:UM:DK:26SSE9IX
Views:2045
Downloads:95
Metadata:XML RDF-CHPDL DC-XML DC-RDF
Categories:KTFMB - FKKT
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Secondary language

Language:English
Title:SYNTHESIS OF CuNi NANOPARTICLES WITHIN REVERSE MICELLES FOR THE APPLICATION IN MAGNETIC HYPERTHERMIA
Abstract:The purpose of this work was to find parameters of the synthesis by microemulsion method (in reverse micelles) with chemical coprecipitation and further modification, that would give CuNi magnetic nanoparticles that are appropriate for the application in the magnetic hyperthermia. With use of the titration method and ternary phase diagrams we checked area of stability of microemulsions that contain precursors needed in the synthesis. Nanoparticles (CuNi) of various compositions were synthesized. Later, they were thermal modified. Samples size measurements and characterization were done by x-ray diffraction (XRD) analysis. With modified thermogravimetric analysis (TGA), Curie temperatures of samples were determined. Morphology of nanoparticles was studied with transmission electron microscope (TEM). At the end magnetic measurements were made with vibrating sample magnetometer (VSM). The slope of hysteresis curve shows low coercitivity. Morphology of that sample indicated agglomeration of particles. This sample was further isothermally modified for three hours at 500 °C in Ar/H2 atmosphere. It showed Curie temperature of 45 °C, so this sample would be the most suitable for the use in magnetic hyperthermia. Results revealed that further researches are needed to lower degree of agglomeration in process of the synthesis.
Keywords:reverse micelles, magnetic nanoparticles, Curie temperature, chemical coprecipitation, magnetic hyperthermia


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