I thought colloidal meant 'smallest particle'. dee On 17 Dec 2009, at 16:33, [email protected] wrote:
> Rusty, > Nano refers to a certain size. > Separate atoms or ions of silver are well in the nano range. > Colloidal means a state of association or bunching of atoms or ions where > these clusters are suspended in a fluid (water) If the clusters are large > enough they will sink to the bottom of the container. If they are small > enough they "float" and take a long time to settle. > The popular wisdom is that small colloidal clusters are more effective. >
