{"id":1001,"date":"2019-02-06T10:07:38","date_gmt":"2019-02-06T09:07:38","guid":{"rendered":"http:\/\/www.vincent.org.rs\/en\/?page_id=1001"},"modified":"2019-02-06T10:36:45","modified_gmt":"2019-02-06T09:36:45","slug":"engineering-and-optimization-of-specific-absorption-rates-of-fe-oxide-nanoparticles-in-magnetic-hyperthermia","status":"publish","type":"page","link":"http:\/\/www.vincent.org.rs\/en\/v_kuncser_abstract\/","title":{"rendered":"Engineering and optimization of Specific Absorption Rates of Fe oxide                          nanoparticles in magnetic hyperthermia"},"content":{"rendered":"\n<p><strong><a href=\"http:\/\/www.vincent.org.rs\/en\/v_kuncser\/\">V. Kuncser<\/a><\/strong><sup>1<\/sup>, N. Iacob<sup>1<\/sup>, A. Kuncser<sup>1<\/sup>, P. Palade<sup>1<\/sup>, C. Comanescu<sup>1<\/sup>, R. Turcu<sup>2<\/sup>, G. Schinteie<sup>1<\/sup><\/p>\n\n\n\n<p><em><sup>1<\/sup>National Institute of Materials Physics, 077125, Bucharest-Magurele, Romania<br \/> <sup>2<\/sup>National Institute of Isotopic and Molecular Technologies, Cluj-Napoca, Romania<\/em><\/p>\n\n\n\n<p>Issues related to the magnetic response\nof complex systems consisting of different types of Fe oxide nanoparticles\n(with different shapes and aspect rations, non-interacting or forming\nassembles, etc.) with respect to magnetic hyperthermia effects are emphasized\ntogether with proposed theoretical and experimental solving items. Specific\ncharacterization methodologies based on temperature and field dependent\nM\u00f6ssbauer spectroscopy and SQUID magnetometry deserving an adequate magnetic\ncharacterization of the nanoparticulate systems in respect to phase composition, local and\nlong-range magnetic structure, intra- and inter-particle magnetic interactions\nand mainly to the magnetic relaxation phenomena of interest for heat transfer\nmechanisms in magnetic hyperthermia are\nunderlined. The different methodologies for the correct evaluation of the specific\nabsorption rate (SAR) from real experimental data taking into account also\nenvironmental loss factors are critically\ndiscussed. Micromagnetic simulations and complementary analytical tools are\nused in order to search for optimal shapes and sizes of non-interacting Fe\noxide magnetic nanoparticles leading to enhanced specific absorption rates. A\nspecific attention is provided to the effects of inter-particle (dipolar type)\ninteractions on the magnetic relaxation effects in magnetic fluids of different\nvolume fractions. It has been proven by micromagnetic\nsimulations that the direct effect of the inter-particle dipolar interaction is\nnot only an increased particle anisotropy energy but also a decrease of the\ncharacteristic time constant \u03c4<sub>0<\/sub>, with direct influence on the\nefficiency of the heat transfer during potential hyperthermia treatments.\nExperimental determination of specific absorption rates on ferrofluids with\nsimilar nanoparticles but of different volume fractions as well as in case of\nferrofluids with different shapes and size of nanoparticles are presented and\ndiscussed.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>V. Kuncser1, N. Iacob1, A. Kuncser1, P. Palade1, C. Comanescu1, R. Turcu2, G. Schinteie1 1National Institute of Materials Physics, 077125, Bucharest-Magurele, Romania 2National Institute of Isotopic and Molecular Technologies, Cluj-Napoca, Romania Issues related to the magnetic response of complex systems consisting of different types of Fe oxide nanoparticles (with different shapes and aspect rations, non-interacting [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":[],"_links":{"self":[{"href":"http:\/\/www.vincent.org.rs\/en\/wp-json\/wp\/v2\/pages\/1001"}],"collection":[{"href":"http:\/\/www.vincent.org.rs\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"http:\/\/www.vincent.org.rs\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"http:\/\/www.vincent.org.rs\/en\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"http:\/\/www.vincent.org.rs\/en\/wp-json\/wp\/v2\/comments?post=1001"}],"version-history":[{"count":2,"href":"http:\/\/www.vincent.org.rs\/en\/wp-json\/wp\/v2\/pages\/1001\/revisions"}],"predecessor-version":[{"id":1020,"href":"http:\/\/www.vincent.org.rs\/en\/wp-json\/wp\/v2\/pages\/1001\/revisions\/1020"}],"wp:attachment":[{"href":"http:\/\/www.vincent.org.rs\/en\/wp-json\/wp\/v2\/media?parent=1001"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}