The influence of synthesis condition and aging process of silver nanocrystals on the formation of silver nanorods

► The particle size and crystal defect of seeds are determined by the synthesis methods. ► The differences in crystal defects determine the possibility of selective adsorption. ► The large and heavily aged nanocrystals are best suitable for acting as silver seeds. ► The use of seeds obtained by addition of NaBH4 all at once produces most Ag nanorods. ► Particle size, crystal defect and aging time of silver seeds are the key factors.