NO CS generator that uses electricty and water makes particles AT ALL. They emit ON LY ions [Ag+] and anions [OH-] "Particles" form after the ions and anions are emitted and come in *ranges of sizes* according to water conditions. Barring reactions with water contaminants, particles will consist of Silver Hydroxide [AgOH], Silver Oxide [AgO] and pure metallic silver [Ag]

In order for a silver ion to convert into pure metallic silver, it must pick up a free electron, but there are no free electrons in water....therefore there are two places that can happen.

One is the surface of the container where glass can act as a capacitor and the componants of the glass [which is mostly silicon ] can act as a lousy solar panel to deposit electrons gathered from external electromagnetic radiation onto the 'capacitor' for passing ions to pick up. 

The other is the electrode to water surface interface where electrons are flowing along the surface of the metal but not engaged in electro-chemical electron transport ie "Ion exchange" mechanisms [which is the only way electricity can travel through water]

The Scanning Electron Microscope can only see dried samples. If you dry ionic CS it oxidizes into silver oxide..so what the microscope sees is particles of silver oxide formed from individual ions and bears no relationship what-so-ever to the colloidal particle of pure silver they claim are there.

Those particles depicted were NEVER IN THE WATER. [makes the 'incredible' small numbers jump out nicely though]

Recent tests with more modern equipment [Malvern particle sizer] is much more accurate. Particle Size report PDF