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(a) HRTEM image of Au nanoparticle embedded within a microgel template with measured lattice d-spacing of 0.236 nm; (b) the selected area electron diffraction (SAED) pattern from several Au nanoparticles; (c) HRTEM image of a magnified single Ag@Au nanocrystal with corresponding lattice parameters of Au and Ag; (d) SAED of Ag@Au nanoparticles.
