PATTERN-FORMATION DURING THE ELECTRODEPOSITION OF A SILVER ANTIMONY ALLOY

It is described how during the electrodeposition of a silver-antimony alloy patterns can develop in the deposit. The patterns occur as movin g bands, target patterns, and spiral waves, and are characterized usin g various types of microscopy. For the patterns to develop, the hydrod ynamic conditions close to the electrode appear to be of prime importa nce. The wave characteristics are discussed in relation with recent st udies on patterns on (single crystal) catalyst surfaces and convection -induced chemical instabilities.