Hi All,
As we already know not always evrything is without problems.
At this link you would find some clues and evidance that Silver Nanoparticles could be problematic.
http://www.nanowerk.com/spotlight/spotid=5966.php
Guy

PS
that leads to the conclusion that while dealing with biomaterial the first step should be to check the biocompetability of the material that is going to be used.