Tailoring the cap’s morphology of electrodeposited gold micro-mushrooms

Ordered arrays of gold micro-mushrooms were electrodeposited inside lithographically patterned micro-pores with around 2μm in diameter and 1μm in depth. By using a commercial electrolytic gold bath and adjusting the deposition time (3–30 min) and potential (−0.8 to −1.3 V), one was able to tune the mushrooms’ morphology. Flattened caps with large grain sizes were obtained at lower potentials and short depositions; rounded caps with smaller...