TEM images of two different types of single-crystal Ag seeds and Ag nanocubes obtained from these seeds: (A, B) spherical seeds and the resultant nanocubes, respectively; and (C, D) cubic seeds and the resultant nanocubes, respectively. In a typical synthesis, 200 μL AgNO3 (282 mM) was added to 50 μL of spherical (1.1×1012 particles/mL) or cubic (1.1×1012 particles/mL) seeds, and the reaction was terminated in 3 h.