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Spinel Ferrite Core-Shell Nanostructures by a Versatile Solvothermal Seed-Mediated Growth Approach and Study of Their Nanointerfaces
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SYSNO ASEP 0477901 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Spinel Ferrite Core-Shell Nanostructures by a Versatile Solvothermal Seed-Mediated Growth Approach and Study of Their Nanointerfaces Author(s) Angotzi, M. S. (IT)
Musinu, A. (IT)
Mameli, V. (IT)
Ardu, A. (IT)
Cara, C. (IT)
Nižňanský, Daniel (UACH-T) ORCID, SAI, RID
Xin, H. L. (US)
Cannas, C. (IT)Source Title ACS Nano. - : American Chemical Society - ISSN 1936-0851
Roč. 11, č. 8 (2017), s. 7889-7900Number of pages 12 s. Language eng - English Country US - United States Keywords ferrite ; core-shell nanoparticles ; cofe2o4/nife2o4 ; EELS ; EDX Subject RIV CA - Inorganic Chemistry OECD category Inorganic and nuclear chemistry Institutional support UACH-T - RVO:61388980 UT WOS 000408520900038 EID SCOPUS 85028465405 DOI 10.1021/acsnano.7b02349 Annotation An easy, low-cost, repeatable seed-mediated growth approach in solvothermal condition has been proposed to synthesize bimagnetic spinel ferrite core-shell heterostructures in the 10-20 nm particle size range. Cobalt ferrite and manganese ferrite nanoparticles (CoFe2O4 and MnFe2O4) have been coated with isostructural spinel ferrites like maghe. mite/magnetite, MnFe2O4, and CoFe2O4 with similar cell parameters to create different heterostructures. The conventional study of the structure, morphology, and composition has been combined with advanced techniques in order to achieve details on the interface at the nanoscale level. Clear evidence of the heterostructure formation have been obtained (i) indirectly by comparing the Fe-57 Mossbauer spectra of the core shell samples and an ad hoc mechanical mixture and (ii) directly by mapping the nanoparticles' chemical composition by electron energy loss spectroscopy (EELS) and energy-dispersive X-ray spectroscopy (EDX) in the scanning transmission electron microscopy mode (STEM). In addition, chemical-sensitive electron tomography in STEM-EDX mode has been applied in order to obtain detailed 3D images with a sub-nanometer spatial resolution. Workplace Institute of Inorganic Chemistry Contact Jana Kroneislová, krone@iic.cas.cz, Tel.: 311 236 931 Year of Publishing 2018
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