Spiral waves consisted of deposited Ag and Sb were propagating two-dimensio
nally on a copper electrode surface while the electrochemical co-deposition
of the metals was proceeding. A rime course of this electrochemically driv
en wave-propagation was phenomenologically similar to the one driven by a h
omogeneous non-linear reaction in Belousov-Zhabotinsky (BZ) reaction-diffus
ion medium. The Ag/Sb co-deposition also formed a layered structure in the
depth, Finally it made a 3-dimensional super-structure on the electrode.