Core-shell La.sub.1-x./sub.Sr.sub.x./sub.MnO.sub.3./sub. nanoparticles as colloidal mediators for magnetic fluid hyperthermia

0348786 - FZÚ 2011 RIV GB eng J - Journal Article
Pollert, Emil - Kaman, Ondřej - Veverka, Pavel - Veverka, Miroslav - Maryško, Miroslav - Závěta, Karel - Kačenka, M. - Lukeš, I. - Jendelová, Pavla - Kašpar, P. - Burián, M. - Herynek, V.
Core-shell La_1-xSr_xMnO₃ nanoparticles as colloidal mediators for magnetic fluid hyperthermia.
Philosophical Transactions of the Royal Society A-Mathematical Physical and Engineering Sciences. Roč. 368, č. 1927 (2010), s. 4389-4405. ISSN 1364-503X. E-ISSN 1471-2962
R&D Projects: GA AV ČR KAN200200651; GA AV ČR KAN201110651
Institutional research plan: CEZ:AV0Z10100521; CEZ:AV0Z50390512
Keywords : magnetic fluid hyperthermia * manganese perovskites * nanoparticles
Subject RIV: BM - Solid Matter Physics ; Magnetism
Impact factor: 2.457, year: 2010

Core-shell nanoparticles consisting of La_1-xSr_xMnO₃ cores covered by silica were synthesized by a procedure consisting of several steps, including the sol–gel method in the presence of citric acid and ethylene glycol, thermal and mechanical treatment, encapsulation employing tetraethoxysilane and final separation by centrifugation in order to get the required size fraction. Morphological studies revealed well-separated particles that form a stable water suspension. Magnetic studies include magnetization measurements and investigation of the ferromagnetic–superparamagnetic–paramagnetic transition. Magnetic heating experiments in ‘calorimetric mode’ were used to determine the heating efficiency of the particles in water suspension and further employed for biological studies of extracellular and intracellular effects analysed by tests of viability.
Permanent Link: http://hdl.handle.net/11104/0189216