Effect of pH on morphology and stability of silver nanorods synthesized by seed mediated growth method

Abstract

In this thesis, silver nanorods are prepared by seed mediated growth method. In this method, silver seeds are prepared first and then used as seeds for the preparation of the nanorods. The silver seeds were prepared by the reduction of silver ions with sodium borohydride in the presence of sodium citrate dihydrate as the stabilizer. Effect of pH on the morphology and stability of silver nanorods has been evaluated. Silver nanorods prepared at pH 10.6 are stable. At other pH, either no rods are formed or the synthesized nanorods are unstable and decay with time.