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dc.contributor.authorKopanja, Lazaren_US
dc.contributor.authorTadić, Marinen_US
dc.contributor.authorKralj, Slavkoen_US
dc.contributor.authorŽunić, Jovišaen_US
dc.date.accessioned2020-07-13T09:37:17Z-
dc.date.available2020-07-13T09:37:17Z-
dc.date.issued2018-08-01-
dc.identifier.issn0272-8842-
dc.identifier.urihttp://researchrepository.mi.sanu.ac.rs/handle/123456789/3791-
dc.description.abstractDue to advances in electron microscopy and to the development of novel nanoparticle structures with different morphologies and the dependence of physical properties on the nanoparticle morphology, there is a need for a more precise analysis of nanoparticle structure and morphology. That should provide a simple and unambiguous comparison of nanoparticles‘ shapes and of material properties that depend on the shape, which has been lacking thus far. Here we study nanochains consisting of silica-coated iron oxide (maghemite, γ-Fe2O3) nanoparticle clusters covered by an additional layer of silica (core-shell structure). We have developed an algorithm for image segmentation and a quantitative analysis of nanochain shape from real TEM images. To that end we used two distinct measures of circularity and elongation measure (the aspect ratio measure). We show that the relative position and the area of the links, as well as the links‘ shape lead to significant differences in the measured aspect ratio of the entire nanochain (substantially influence the elongation of nanochains). We have also analyzed the core-shell structures in nanochains, and computed the shell's share in the overall area of observed nanochains. A Matlab code was developed and used for the computation of the elongation measure of shapes appearing in electron microscopy images. Here we have investigated magnetic properties of synthetic nanochains, that revealed superparamagnetic behavior at room temperature (SPION) with the possibility of tuning the magnetization values (approx. from 19 to 46 emu/g). We have compared of magnetization M(H) curves of the anisotropic nanochains and of isotropic nanoparticle (nanochain links), with the conclusion that the nanochains have a higher magnetic susceptibility, which fact can be understood as a consequence of their anisotropic shapes. The nanochains may be applied in biomedicine and magnetic separation, due to their morphology and magnetic properties.en_US
dc.publisherElsevieren_US
dc.relationMagnetic and radionuclide labeled nanostructured materials for medical applicationsen_US
dc.relationDevelopment of new information and communication technologies, based on advanced mathematical methods, with applications in medicine, telecommunications, power systems, protection of national heritage and educationen_US
dc.relationSlovenian Research Agency for research core funding No. (P2-0089)en_US
dc.relationNanotheranostics based on magneto-responsive materials (No. J1-7302 )en_US
dc.relationTunnelling nanotubes for innovative urinary bladder cancer treatments (No. J3-7494 )en_US
dc.relation.ispartofCeramics Internationalen_US
dc.subjectCircularity | Elongation | Image analysis | Superparamagnetism (SPION) | Surface effects | Synthesisen_US
dc.titleShape and aspect ratio analysis of anisotropic magnetic nanochains based on TEM micrographsen_US
dc.typeArticleen_US
dc.identifier.doi10.1016/j.ceramint.2018.04.021-
dc.identifier.scopus2-s2.0-85045079065-
dc.contributor.affiliationMathematical Institute of the Serbian Academy of Sciences and Artsen_US
dc.relation.grantno45015en_US
dc.relation.grantno44006en_US
dc.relation.firstpage12340-
dc.relation.lastpage12351-
dc.relation.issue11-
dc.relation.volume44-
dc.description.rankM21a-
item.grantfulltextnone-
item.cerifentitytypePublications-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.openairetypeArticle-
item.fulltextNo Fulltext-
crisitem.author.orcid0000-0002-1271-4153-
crisitem.project.projectURLhttp://www.mi.sanu.ac.rs/novi_sajt/research/projects/044006e.php-
crisitem.project.fundingProgramNATIONAL HEART, LUNG, AND BLOOD INSTITUTE-
crisitem.project.openAireinfo:eu-repo/grantAgreement/NIH/NATIONAL HEART, LUNG, AND BLOOD INSTITUTE/5R01HL044006-04-
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