Synthesis and Characterization of Hollow Magnetic Alloy (GdNi₂, Co₅Gd) Nanospheres Coated with Gd₂O₃

Figure 3

SEM image of (a) iron-silica composite nanospheres. (b) Composite hollow spheres (400 ± 5 nm). (c) Iron-gadolinium hollow nanospheres (485 ± 5 nm). (d) After reduction. (e) Cobalt-silica composite nanospheres and (f) removing silica cores (510 ± 5 nm). (g) Precursor nanospheres and (h) removing silica cores after reduction (530 ± 5 nm).

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