(Color online) XRD pattern of the as-synthesized Fe@M nanoparticles with an overlay of the data obtained from the JSPDS reference powder diffraction patterns of α-iron, chromium, and nickel
(Color online) Room temperature VSM data plotted as magnetization (electromagnetic unit per gram) vs applied field (Oersted) for the Fe@M (M=Cr,Ni) core@shell nanoparticles.
TEM image of (a) Fe@Cr and (b) Fe@Ni core@shell nanoparticles synthesized by the reverse micelle technique. Both Fe@Cr and Fe@Ni nanoparticles are relatively uniform sized with an average diameter of 7 and 10 nm, respectively.
XPS survey scans of (a) Fe@Ni nanoparticles and (b) Fe@Cr nanoparticles. (c) Depth profile of Fe 2p region scans and (d) depth profile of Ni 2p regions scans of Fe@Ni core@shell nanoparticles.
The atomic percentage of each element present during various XPS depth profiling etch levels.
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