Fractal patterns formed by thermal treatment in alkali halide crystals

We have succeeded in growing nanocrystals of Ag structured like fractals in several solid matrices (NaCl, KBr and KCl). These are shown to be diffusion-limited aggregates when fractal dimensions were evaluated. Depending upon the crystal in which the fractal structures were obtained, the fractal dimensions of the Ag nanoclusters were found to be between 1.73 and 1.81.