Synthetic procedure and TEM images and size distribution of Pd NPs. (a) Schematic illustration of the synthetic procedure used for the preparation of monodisperse Pd NPs with different sizes by stepwise seed-mediated solvothermal growth. TEM images of Pd NPs prepared after the first (b), second (c) and third growths (d).
Zhang et al. Nanoscale Research Letters 2012 7:312 doi:10.1186/1556-276X-7-312