Hello! I'm a new one from Quebec Canada....
I'm interested to make Colloidale Gold, I just ordered from E Bay a 36 V-350 ma. Led Driver,and in a few days I will order a magnetic stirrer- Hot plate. I don't have gold wire but I have two 1 oz of pure gold bullion. If I understand well, I can just put the tip of my bullion ( anode ) in the solution and use a copper wire or silver or stainless for a large Cathode. But what if I use my other bullion for the cathode ( it will be wider, thicker and shorter than a large wire.)
My question is: Have it any difference with the kind of metal I use for the cathode : (gold, silver, copper or stainless) and have it a difference with a wide piece, thick piece, or thin piece, ( I suppose I need more current than a wire!!) or if a wire of any kind made any difference at all ( for the cathode)