Počet záznamů: 1  

Spinel Ferrite Core-Shell Nanostructures by a Versatile Solvothermal Seed-Mediated Growth Approach and Study of Their Nanointerfaces

  1. 1. 0477901 - UACH-T 2018 RIV US eng J - Článek v odborném periodiku
    Angotzi, M. S. - Musinu, A. - Mameli, V. - Ardu, A. - Cara, C. - Nižňanský, Daniel - Xin, H. L. - Cannas, C.
    Spinel Ferrite Core-Shell Nanostructures by a Versatile Solvothermal Seed-Mediated Growth Approach and Study of Their Nanointerfaces.
    ACS Nano. Roč. 11, č. 8 (2017), s. 7889-7900. ISSN 1936-0851
    Institucionální podpora: RVO:61388980
    Klíčová slova: ferrite * core-shell nanoparticles * cofe2o4/nife2o4 * EELS * EDX
    Kód oboru RIV: CA - Anorganická chemie
    Obor OECD: Inorganic and nuclear chemistry
    Impakt faktor: 13.709, rok: 2017

    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.
    Trvalý link: http://hdl.handle.net/11104/0275313