thanks orac that vector was amusing.
This is a bit like you argument over "silver spoon" with Bill ;-)
Your information is a nice story you believe but it stops there with you ... here try wikipedia(
http://en.wikipedia.org/wiki/Silver_nanoparticles)
You may want to read the part about health concerns which are quite different to natural silver
Exposure to silver nanoparticles has been associated with "inflammatory, oxidative, genotoxic, and cytotoxic consequences"; the silver particulates primarily accumulate in the liver.[5] but have also been shown to be toxic in other organs including the brain.[6]
Silver loaded anti-bacterial paint is produced by the wet process to because they want the collide base on the nano-particles to bind into the paint.
As nano-technology has become a bad word to people like you they are investigating "green" more natural ways to do it but no commercialisation has been achieved.
Examples of attempts to green up the process:
http://www.ipcbee.com/vol5/74-X10024.pdfhttp://journals.tubitak.gov.tr/engineering/issues/muh-10-34-4/muh-34-4-7-1005-30.pdfhttp://www.chalcogen.infim.ro/369_Ankanna.pdfSo if you want to fool yourself that silver nano-particles are somehow natural knock yourself out.