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Schematic representation of the formation of Cu@Fe3O4 heterodimers with different morphologies based on the use of solvents of various polarity (top) and corresponding (HR-)TEM images of (a, b) cube-shape, (c, d) cloverleaf-shape Cu@Fe3O4 heterodimerparticles (bottom). Reproduced with permission from [57]. Copyright 2011 The Royal Society of Chemistry.
