Oh this might be interesting info (or maybe not
) for other people.
My dad worked worked in a Lab and is a chemist. I asked him the question how is the size of the silver nano particles determined?
His answer was, the current of the electrolyse process and the temperature while doing the electrolyse and also the temperature during the reducing process.
The higher the current, the bigger the nano particles. Also the higher the temperature, the bigger the nano particles.