EXPERIMENTAL-OBSERVATION OF LARGE-SIZE FRACTALS IN ION-CONDUCTING POLYMER ELECTROLYTE FILMS

We have succeeded in growing large-size fractals (approximately 2-3 cm ) in solution-casted ion-conducting polymer films of polyethylene oxid e doped with ammonium iodide. These are shown to be ''diffusion-limite d aggregates'' due to iodine ions in random walk. This mechanism is su pported by energy dispersive x-ray analysis, x-ray diffraction, optica l absorption, polarization, and complex impedance studies.