You need to construct a capacitive Voltrolysis reactor using graphite anode and graphite cathode. Build a high voltage(500KV) pulsed signal generator and oscillate it at high radio frequency(100MHz). In the capacitive reactor, mix the gold particle-aggregates with clean water as second dielectric medium. switch the reactor intermitently and get your gold nano-particles you desire. You call me if you like to hear my voice +2348060922286