Size control over Ag nanocubes by adding different amounts of AgNO3 (the left volume), and single-crystal seeds (the right volume), respectively. (A–E) 10, 50, 75, 100, and 200 μL AgNO3 was added to 50 μL of spherical seeds (1.1×1012 particles/mL); (F–J) 300, 200, 100, 50, and 20 μL of the spherical seeds (1.1×1012 particles/mL) was used with 50 μL AgNO3 solution (282 mM).