Core/Shell NP structure from EELS

Distinguishing the core from the shell in MnOx/MnOy and FeOx/MnOx core/shell nanoparticles through quantitative electron energy loss spectroscopy (EELS) analysis.
S. Estradé, Ll. Yedra, A. López-Ortega, M. Estrader, G. Salazar-Alvarez, M.D. Baró, J. Nogués, F. Peiró
Micron 43, 30 (2012)

(a) HAADF images of several core–shell NPs. (b) L3 peak position and (c) Mn L3/L2 intensity ratio along the lines highlighted in the HAADF images, for the three considered nanoparticles. (d) Elemental quantification for the three considered NPs, and simulation considering a 2 nm thick an MnFe2O4 spinel around a Fe3O4 core. (e) Cartoon of the structure of the NPs.