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Magnetic iron oxide@SiO2–Au@C particles with shapes of pseduocube, ellipsoid, and peanut, are synthesized using hematite as templates and precursors of magnetic iron oxide. The Au NPs of ~6 nm are uniformly distributed between the silica and carbon layers, preventing the aggregation and reduced the loss of the metal nanocrystals during recycling. Reprinted from Ref. [69]. Copyright 2015 American Chemical Society.
