As an extremely simple and efficiency way to kill Gram-positive, -negative, -multidrug resistant bacteria, and in particular methicillin-resistant Staphylococcus aureus, gold nanoparticles were grown self-assembling to yield gold nanoshells on the surface of bacteria by the solution contained gold ion but no adding reductant. A starting unit starts an application for which the permission information is stored in the storage unit. The input of the diode is electrically connected to the pump stages in a configuration that allows the charge pump to apply a positive or negative voltage to the memory array or other load.