nano-tekkies: what is "foamy carbon"?

Great info, structuring silver on a matrix to whack back the viral linkage system like a structured charge instead of a shotgun approach...no offense, Dick Cheney. The cow protein link sounds a little argyria-ish to me. Don't wanna turn blue...SO what is PVP and what is "foamy carbon" and where can I get some? Thanks for the link. Very hip.