Samoorganizacija i karakterizacija niklenih nanočestica u dielektričnoj matrici

doctoral thesis

• Title (english): Self-organization and characterization of nickel nanoparticles in dielectric matrix
• Author: Marko Jerčinović
• Mentor: Nikola Radić (mentor)
• Committee member: Krešo Zadro (predsjednik povjerenstva)
• Committee member: Nikola Radić (član povjerenstva)
• Committee member: Goranka Bilalbegović (član povjerenstva)
• Granter: University of Zagreb; Faculty of Science; (Department of Physics); Zagreb
• Defense date and country: 2014, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Physics
• Universal decimal classification (UDC): 53 - Physics

Abstract

U disertaciji je prikazano istraživanje samoorganizacije i fizičkih svojstava niklenih nano čestica unutar dielektrične matrice pripravljenih jednostavnom metodom naizmjenične magnetronske depozicije dvaju različitih slojeva. Deponirano je više serija različitih višeslojnih tankih filmova u kojima je variran jedan od parametara depozicije. Provedena su detaljna strukturna mjerenja korištenjem više metoda, a radi uvida u funkcionalna svojstva i moguću primjenu na odabranim uzorcima obavljena su magnetska mjerenja. Kombinacijom utjecaja difuzije i površinske morfologije mehanizam samoorganiziranog rasta nanočestica rezultira jednolikom veličinom nanočestica i njihovim pravilnim rasporedom u 2D/3D rešetku. Istražen je utjecaj pojedinih parametara depozicije: vrste matrice, debljine slojeva Ni, temperature podloge, udjela matrice u miješanim slojevima te broja slojeva, na oblik, unutrašnju strukturu i raspodjelu veličine nanočestica , te tip i pravilnost njihova uređenja u nanočestičnu rešetku. Magnetskim mjerenjima proučen je magnetski odziv formiranih nanočestičnih rešetki, s osvrtom na rezultate strukturnih mjerenja.

Abstract (english)

The dissertation presents the investigation of self-organization and physical properties of nickel nanoparticles within the dielectric matrix prepared by the simple method of sequential magnetron sputtering deposition of two alternating layers. We deposited several series of different multilayered thin films, with one deposition parameter varied in each series. A detailed structural characterization was performed using multiple complementary methods, while magnetic measurements were done on selected samples to gain insight into the functional properties and possible applications. The self-assembly mechanism of nanoparticle growth resulted in the uniform nanoparticle sizes and their regular arrangement in the 2D/3D lattice via the combination of diffusion and surface morphology effects. We studied the influence of certain deposition parameters including matrix type, Ni layer thickness, substrate temperature, matrix content in the mixed layers, and number of deposited layers on the nanoparticle shape, internal structure and size distribution, type of nanoparticle ordering in the lattices and the degree of their regularity. Using the magnetic measurements, we investigated the magnetic response of the formed nanoparticle lattices and its relation to the measured structural properties.

• Keywords: nanočestice Ni; samoorganizacija; magnetronsko rasprašenje; višeslojni tanki filmovi; GISAXS; Ni
• Keywords (english): Ni nanoparticles; self-organization; magnetron sputtering; multilayered thin films; GISAXS
• Language: croatian
• URN:NBN: urn:nbn:hr:217:230605
• Study programme: Title: Physics; Study programme type: university; Study level: postgraduate; Academic / professional title: doktor/doktorica znanosti, područje prirodnih znanosti, polje fizika (doktor/doktorica znanosti, područje prirodnih znanosti, polje fizika)
• Type of resource: Text
• Extent: 98 str.
• File origin: Born digital
• Access conditions: Open access
• Created on: 2017-08-22 10:32:22