| 초록 |
Silver nanoplates with a high aspect ratio were successfully synthesized in a single step and in a high yield by reducing silver nitrate with poly(vinyl pyrrolidone) (PVP) in N,N-dimethylformamide. In the synthesis, the hydroxyl end groups of the PVP served as a mild reductant in the kinetically controlled synthesis, and DMF played a critical role as a reaction medium (solvent) for the formation and growth of the nanoplate morphology. Unlike the triangular and hexagonal nanoparticles prepared according to the previously reported protocols, the planar surfaces of the Ag nanoplates prepared here were asymmetric and irregular in shape. The formation of such large nanoplates with irregular shapes was explained as occurring via an edge-selective particle fusion process. Interestingly, the growth of the nanoplates proceeded along different pathways, as evidenced by variations in the shape evolution, depending on the PVP to AgNO3 weight ratio. |
